Reduced Power Mode? See here first - Chevy Colorado & GMC Canyon
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post #1 of 72 (permalink) Old 03-14-2008, 03:52 AM Thread Starter
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Reduced Power Mode? See here first

#08-06-04-014: MIL/SES, DTCs P060E, P1516, P2135 and/or P2138 with Reduced Engine Power (Test and Charge Battery) - (Mar 4, 200

Subject: MIL/SES, DTCs P060E, P1516, P2135 and/or P2138 with Reduced Engine Power (Test and Charge Battery)


Models: 2004-2007 Chevrolet Colorado

2004-2007 GMC Canyon

2006-2007 HUMMER H3

with 2.8L, 2.9L, 3.5L or 3.7L Engine (VINs 6, 8, 9, E -- RPOs L52, LK5, LLV, LLR)

Condition:
Some customers may comment on an MIL/SES light Illuminated with the" Reduced Engine Power" message or indicator displayed. A technician may find two or more of the following DTCs stored in the ECM:

• P060E : Control Module Throttle Position (TP) System Performance

• P1516 : Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance

• P2135 : Throttle Position (TP) Sensor 1-2 Correlation

• P2138 : Accelerator Pedal Position (APP) Sensor 1-2 Correlation

Cause:
A battery voltage drop during the cranking cycle may cause the codes to set and place the vehicle into the reduce engine power mode.

Correction:
Test and charge the battery using the steps below.

Important: A low voltage condition may cause at least two of the following DTCs to set.

• P060E : Control Module Throttle Position (TP) System Performance

• P1516 : Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance

• P2135 : Throttle Position (TP) Sensor 1-2 Correlation

• P2138 : Accelerator Pedal Position (APP) Sensor 1-2 Correlation


Perform a Diagnostic System Check. Refer to Diagnostic System Check - Vehicle in SI.
Check for DTCs and review the Freeze Frame/Failure Records to determine if sufficient ignition voltage was present when the DTC set.
• If the ignition voltage was low, then check for a possible battery drain. Refer to Battery Electrical Drain/Parasitic Load Test.

• If the ignition voltage was sufficient when the code set, proceed with normal SI diagnosis for the code(s) set.

Test and recharge the battery using Bulletin 02-06-03-009 or latest version on "Battery Charging Tips'.
Clear all DTCs.


OK after looking again i found 5.23 volts should be the minimum battery voltage during cranking, otherwise you might have the issues listed in this TSB. Pretty much a weak battery might cause this.


#07-06-04-019: Intermittent MIL/SES, DTC P2138 with Reduced Engine Power (Repair Instrument Panel (IP) to Body Harness Connector) - (Jun 21, 2007)

Subject: Intermittent MIL/SES, DTC P2138 with Reduced Engine Power (Repair Instrument Panel (IP) to Body Harness Connector)


Models: 2005-2008 GM Passenger Cars and Light Duty Trucks (Including Saturn)

2005-2008 HUMMER H2

2006-2008 HUMMER H3

2005-2008 Saab 9-7X




--------------------------------------------------------------------------------

Condition:
Some customers may comment on an intermittent MIL/SES light Illuminated with a message center or an indicator that displays Reduced Engine Power. DTC P2138 - Accelerator Pedal Position (APP) Sensor 1-2 Correlation may be set. The voltage difference between APP sensor 1 and APP sensor 2 exceeds a predetermined value for more than 2 seconds. Refer to DTC P2138 in SI for further diagnostics.

Cause:
On some vehicles, the IP to body harness connector, which carries the APP signal to the ECM/PCM, is located in the left hand kick panel area and if the kick panel is not sealed properly, water enters and causes a short in the APP circuits setting a P2138 code.

Correction:
Important: Do Not replace the accelerator pedal assembly.

Locate the IP to body harness connector, which may be located in and around the left hand kick panel area. Check to see if there is a water leak into the area and repair as necessary.





#07-06-04-003: LSJ, L61, LK5, L52, LL8 Engine - Reduced Engine Power, MIL/SES Light, DTC P1516, P2135, P2138 (Replace PCM) - (Jan 19, 2007)

Subject: LSJ, L61, LK5, L52, LL8 Engine -- Reduced Engine Power, MIL/SES Light, DTC P1516, P2135, P2138 (Replace PCM)


Models: 2005-2006 Chevrolet Cobalt, Cobalt SS, Malibu

2006 Chevrolet Colorado, TrailBlazer

2006 GMC Canyon, Envoy

2006 HUMMER H3

2005-2006 Saturn ION, ION Red Line

2006 Saab 9-7X

with ECOTEC™ 2.0L, 2.2L I-4 Cylinder Engine (VINs P, F-- RPOs LSJ, L61) or

VORTEC™ 2.8L I-4, 3.5L I-5, 4.2L I-6 Cylinder Engine (VINs 8, 6, S -- RPOs LK5, L52, LL



Attention: The following bulletin information is only to be used if the customer has returned for REPEAT repairs for DTCs P1516, P2135 and/or P2138.



--------------------------------------------------------------------------------

Condition:
Some customers may comment on engine operation in the Reduce Engine Power mode with the MIL/SES light illuminated. This condition may be repeated and upon investigation, the technician may find the following DTCs set as current or in history:

• DTC P1516 Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance

• DTC P2135 Throttle Position (TP) Sensor 1-2 Correlation

• DTC P2138 Accelerator Pedal Position (APP) Sensor 1-2 Correlation

Cause:
This condition of a repeat DTC P1516, P2135 and/or P2138 may be caused by an internal concern with the PCM.

Correction:
Important: DO NOT replace the APP sensor. Inspect the PCM build date first.

Before following the diagnostic information in SI on DTCs P1516, P2135 and/or P2138, an inspection of the PCM serial number year and Julian (PCM build) date will be necessary to determine if the PCM will need to be replaced to correct the repeat DTC P1516. Refer to Engine Control Module Replacement in SI in order to remove the PCM. Refer to the above graphic illustration (1) for the location of the PCM serial number.

The serial number is read left to right. The last digit of the year is the 9th character and the Julian date is comprised of the 10th, 11th and 12th characters and is used to determine the PCM build date. Refer to the example below to read a build date from the PCM serial number:

* 8 6 Y N AU K 1 5 3 2 5 0 R P N *

If the PCM year and Julian dates are between 5182 and 5304 , replace the PCM. Refer to the Part Catalog to order the correct PCM for your vehicle application, if necessary.

Vehicles with PCM built outside the dates should refer to SI diagnostics for DTCs P1516, P2135 and/or P2138.



FYI the APP sensor is the Accelerator Pedal Position sensor.

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post #2 of 72 (permalink) Old 04-21-2008, 07:52 PM
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Re: Reduced Power Mode? See here first

Very good information, as always, Izzy! :D
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post #3 of 72 (permalink) Old 05-20-2008, 01:41 AM
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Re: Reduced Power Mode...

IzzY you have done it again! More relavent info the colly / canyon owners need to know!
I just wish the twins had the Vortec 4300 my s-10 had... call it what you may, I liked my 4.3 V6.

Close is only good in horseshoes, grenades, and nuclear warheads...
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post #4 of 72 (permalink) Old 05-20-2008, 04:18 AM
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Re: Reduced Power Mode? See here first

hey izzy, as a side note to this...have you ever seen where a colorado will climp to 1500rpms, level, climb to 2100rpms, and then flake out, drop to 600rpms and go into reduced power mode? I was thinking it might me a power issue, so thats why im throwing it in here. Its totally random but will only do it on startup and idle. feel free just to pm me.
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post #5 of 72 (permalink) Old 05-23-2008, 04:10 AM Thread Starter
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Re: Reduced Power Mode? See here first

Runblade im not sure man, I would have to be there to look at it I suppose but no i've never seen that yet.

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post #6 of 72 (permalink) Old 06-02-2008, 06:36 PM
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Re: Reduced Power Mode? See here first

OMG My pcm just blow out and thx to Izzy problem solved...





Thx man







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post #7 of 72 (permalink) Old 06-02-2008, 11:27 PM Thread Starter
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Re: Reduced Power Mode? See here first

Sweet bro, I hope they're replacing it under PCM 80k mile warranty?

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post #8 of 72 (permalink) Old 06-03-2008, 12:59 AM
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Re: Reduced Power Mode? See here first

Yes and many thx again Izzy





Bubbawho

2005 Colly 4 x 4 LS sport I5 Ext cab 5 speed Good mark 2 inch cowl debadged [color=#FF0000]

Efan, cold air intake, Magnaflow Cat back 15845 Viper 320 HV alarm SS billet grill/mirrors smooth steel pan 17 inch American racing wheels Domintor Teflon Black BS 5.5 Huskey liners , Shaved door handles / tailgate, Iron bull front bumper, Bushwacker fender flares front/back. HP tuned. Custom : header, CTS caddy console, interior blue led. Nitto Terra Grappler 285/70/17 ~ 32.7 / 11.0


Supported by : THE WOLF ( shifter black chrome, crossmember cap ) , Supermodulation (3rd brake light, interior lighting, skid plate )




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post #9 of 72 (permalink) Old 08-26-2008, 11:03 PM
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Re: Reduced Power Mode? See here first

i keep getting a P2138 and P060E DTC....battery has been replaced & tested...voltage & ignition have been monitored
no voltage drops..... IP to body harness connector..never got a drop of water on it...and my PCM's year and Julian date
is outside of range specified for replacing the PCM....what else could be making my truck throw P2138 & P060E....
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post #10 of 72 (permalink) Old 12-24-2008, 06:49 PM Thread Starter
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Re: Reduced Power Mode? See here first

Quote:
Originally Posted by SilentJ
ugh...blew into the "Reduced Power" mode again. I'll print this off and have it in hand when I go back to the dealership...mine has only ever done this when it's below -25C and did it yesterday for the first time while driving.

funny thing is that I stopped to disconnect the battery cable, it was all good when I started back up except I was showing a CEL and I had the thing where the power door locks and drivers side window don't work! wtf. so whack. So I threw the OEM intake back on so when I take it in they'll actually look at it. I really wish I wasn't still paying for it... :(
I moved the remainder of this topic into a new thread so that if anyone else runs into this they can see this. Hope you don't mind.

viewtopic.php?f=8&t=67344

Quote:
Originally Posted by radix10
i keep getting a P2138 and P060E DTC....battery has been replaced & tested...voltage & ignition have been monitored
no voltage drops..... IP to body harness connector..never got a drop of water on it...and my PCM's year and Julian date
is outside of range specified for replacing the PCM....what else could be making my truck throw P2138 & P060E....
OK sorry I just barely saw this, my bad.

Ok after re-reading this thread a few times the only thing i can say is if the IP connector checks out ok with no moisture and your positive your battery is good then perhaps your Accelerator Pedal Position (APP) Sensor may be faulty. The APP of course is the gas pedal so maybe try swapping it out with a new one.

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post #11 of 72 (permalink) Old 01-20-2009, 08:25 PM
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Re: Reduced Power Mode? See here first

Please check my post on the throttle body thread (should be just below thos thread I suspect).
I had slow cranking, 05 Colly I5 w/orig. battery.
Codes I had were P1516 and P2101. They also said battery "connections were loose" (which I would deny, I've used the colly to jump other vehicles many times), and failed load test. Normally it cranks fine, just these last few days of last week were a little slow, but sheeesh it was -20f.
So I am now wondering, if the voltage just took a diver on me on this start up and tossed it in to limp home, and really a better battery and a reset would have fixed it? $476 was the damages on the throttle actuator.

Other thing on the work order:
During service, LF power window and power door locks quit working

Suspect logic lock in left front power window master switch assembly

Checked power lock and window circuits-all OK, reset power to master switch assembly and both problems were gone. Suspect internal problem with master switch assembly.

What does this mean "reset", did they blow a fuse or is there more to it than I realize, sounds fishy.

Gilly

Waiting for all you Guinea Pigs to make GM get them sorted out before I buy.
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post #12 of 72 (permalink) Old 01-21-2009, 09:45 PM
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Re: Reduced Power Mode? See here first

mine done the reduced power mode today and sputtered like crazy. i had to turn it off. i waited about 10mins, turnd it back on, ran fine with a check engine light. went to work and plugged it in. i had a maf code, throttle body sensor code, crank sensor code, and something else that didnt activate while the reduced power mode happened, but were set BEFORE i bought the vehicle, the guy i work with said it prolly just took time for the codes o make stuff act stupid. this is the only time i had a problem with my truck. the codes he remembered to write down were P0017b, p0068a and p0106b. this weekend im doing a tune up to my truck since i dont know what the previous owners done to it and will plug it back into the scan tool tomorrow to see if any returned. hope it isnt anyhing major.

im up there.
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post #13 of 72 (permalink) Old 05-14-2009, 12:05 AM
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Re: Reduced Power Mode? See here first

Ok so I am getting a 2101 and a 2610. Took the PCM out after replacing the battery took it to the dealership and they looked it over said its fine and uploaded new updates. So instead of buying a new throttle body I took the one off my dads 09 canyon and slapped it on mine after letting it sit with no power for about 40 minutes and it still runs like poo. I am recently laid off and don't have a ton of money to get my truck running and need it to look for a new job!

When it starts it idles so ruff I just shut it off it seems like it is getting ready to die everytime. O and its an 06 Canyon 3.5 with auto. Any help would be awesome.
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post #14 of 72 (permalink) Old 05-14-2009, 04:26 PM Thread Starter
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Re: Reduced Power Mode? See here first

Quote:
Originally Posted by barman84
Ok so I am getting a 2101 and a 2610. Took the PCM out after replacing the battery took it to the dealership and they looked it over said its fine and uploaded new updates. So instead of buying a new throttle body I took the one off my dads 09 canyon and slapped it on mine after letting it sit with no power for about 40 minutes and it still runs like poo. I am recently laid off and don't have a ton of money to get my truck running and need it to look for a new job!

When it starts it idles so ruff I just shut it off it seems like it is getting ready to die everytime. O and its an 06 Canyon 3.5 with auto. Any help would be awesome.
2601 - This diagnostic applies to internal microprocessor integrity conditions within the powertrain control module (PCM). This diagnostic also addresses if the PCM is not programmed.

2101 - The commanded throttle position (TP) is compared to the actual TP. Both values should be within a calibrated range of each other. The powertrain control module (PCM) continuously monitors the commanded and actual TPs. This DTC sets if the values are greater than the calibrated range.


Well I don't think your problems have anything to do with this topic of REDUCED POWER MODE however 2610 should only set if there was a problem with the PCM and since you already had it looked at.... i would just bite the bullet and take the truck into the dealer and havem look at it. The PCMs are covered under emissions warranty and the cylinder head is covered under 100k mile warranty so if you do have the cylinder head valve seat issue you should be ok. But that sounds like a faulty PCM to me if it doesn't see its programming or thinks a known good throttle body/TPS is bad.

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post #15 of 72 (permalink) Old 05-14-2009, 10:19 PM
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Re: Reduced Power Mode? See here first

Quote:
Originally Posted by turbizzy
Quote:
Originally Posted by barman84
Ok so I am getting a 2101 and a 2610. Took the PCM out after replacing the battery took it to the dealership and they looked it over said its fine and uploaded new updates. So instead of buying a new throttle body I took the one off my dads 09 canyon and slapped it on mine after letting it sit with no power for about 40 minutes and it still runs like poo. I am recently laid off and don't have a ton of money to get my truck running and need it to look for a new job!

When it starts it idles so ruff I just shut it off it seems like it is getting ready to die everytime. O and its an 06 Canyon 3.5 with auto. Any help would be awesome.
2601 - This diagnostic applies to internal microprocessor integrity conditions within the powertrain control module (PCM). This diagnostic also addresses if the PCM is not programmed.

2101 - The commanded throttle position (TP) is compared to the actual TP. Both values should be within a calibrated range of each other. The powertrain control module (PCM) continuously monitors the commanded and actual TPs. This DTC sets if the values are greater than the calibrated range.


Well I don't think your problems have anything to do with this topic of REDUCED POWER MODE however 2610 should only set if there was a problem with the PCM and since you already had it looked at.... i would just bite the bullet and take the truck into the dealer and havem look at it. The PCMs are covered under emissions warranty and the cylinder head is covered under 100k mile warranty so if you do have the cylinder head valve seat issue you should be ok. But that sounds like a faulty PCM to me if it doesn't see its programming or thinks a known good throttle body/TPS is bad.
I bought my 06 in February of 06 they started doing the 100k warranties about 6 months later. So the head isn't covered honestly if it was the head I would have had problems then just one morning right. Heck I pulled my boat the day before no problems at all. Woke up the next morning and its no good. This is the very first issue I have had with this truck and it sucks hardcore. I am going to limp it if I can to the kwik car up the street to have it put on a real diagnostics machine.

I have a really close friend who works at the dealership and he told me if its not one of those two parts which I already voted out its probably the gas pedal? or a bad 02 sensor but I have never had a car do this with a bad o2 before.
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post #16 of 72 (permalink) Old 05-15-2009, 03:25 AM Thread Starter
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Re: Reduced Power Mode? See here first

The PCM code i don't understand why thats commin up but the TPS code could very well be the APP or accelerator pedal position sensor (gas pedal). Im suspecting your PCM being faulty causing issues... i'd seriously have it looked at a dealer rather than an independant shop.

Also, all 04-06s have the 100k mile cylinder head warranty FYI.

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post #17 of 72 (permalink) Old 05-15-2009, 08:42 AM
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Re: Reduced Power Mode? See here first

Quote:
Originally Posted by turbizzy
The PCM code i don't understand why thats commin up but the TPS code could very well be the APP or accelerator pedal position sensor (gas pedal). Im suspecting your PCM being faulty causing issues... i'd seriously have it looked at a dealer rather than an independant shop.

Also, all 04-06s have the 100k mile cylinder head warranty FYI.
I didn't know they were covered for the cylinder head thats awesome to know is there any information on that in case it is the cylinder head? I have had dealers in the past try to rip me off on service and not want to cover it under warranty before. Its going to the dealership tomorrow.
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post #18 of 72 (permalink) Old 05-15-2009, 04:35 PM Thread Starter
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Re: Reduced Power Mode? See here first

Quote:
Originally Posted by barman84
Quote:
Originally Posted by turbizzy
The PCM code i don't understand why thats commin up but the TPS code could very well be the APP or accelerator pedal position sensor (gas pedal). Im suspecting your PCM being faulty causing issues... i'd seriously have it looked at a dealer rather than an independant shop.

Also, all 04-06s have the 100k mile cylinder head warranty FYI.
I didn't know they were covered for the cylinder head thats awesome to know is there any information on that in case it is the cylinder head? I have had dealers in the past try to rip me off on service and not want to cover it under warranty before. Its going to the dealership tomorrow.
Well if you read the stickey i made a while back, i know its alot to read, it talks about everything people experienced.

viewtopic.php?f=43&t=26513&hilit=P0300

Also try searching CYLINDER HEAD, P0300 and MISFIRE there are tons of threads on this.

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post #19 of 72 (permalink) Old 04-09-2010, 08:56 PM
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Re: Reduced Power Mode? See here first

New to the forum, just wanted to thank Izzy for posting this info. Saved me a lot of hassel at the GM dealership just knowing enough that they didn't try to BS me on replacing the PCM on my 06 Colorado. {one of the bad ones} Keep up the good work aqnd agian, my thanks
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post #20 of 72 (permalink) Old 04-30-2010, 03:27 AM
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Re: Reduced Power Mode? See here first

Reading through these posts reminds me of how my 05 Colly ran for 6 months. I thought it was the battery, the computer, the loom, the MAF, gremlins.... I was arranging to buy a new Alternator after a "Mechanic" assured me this was the answer (even though I was there when it tested fine).

I stopped at Autozone and bought a $3 can of Throttle Body cleaner, just on a whim... pulled the air-pipe and sprayed it for 30 seconds. Put the pipe back on so the MAF wouldn't monkey the idle and started her up.

Smooth as a baby's butt. No engine light, no rough idle, big pickup at the lights, donuts in the parking lot. $3.

It happened again 6 months later, sprayed it all over inside for 60 seconds and got the same instant fix. Sticky throttle plate was screwing up the whole engine and electrical system, go figure!

That was a year ago. No engine problems since.
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