Question about 2006 GMC Yukon

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Code p2120 and P2125 on GMC Yukon 5.3 2006 with low engine power message. can you please tell me whats that .

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OBD-II code P2120 What does it mean? Throttle/Pedal Position Sensor/Switch "D" Circuit

Poooooooooo2125
ThrottlP2125
ThrP2125
Throttle/Pedal Position Sensor/Switch "E"ottle/Pedal Position Sensor/Switch "E"e/Pedal Position Sensor/Switch "E"

Posted on May 27, 2010

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P2125. 2003 Yukon. Replaced wiring harness. not voltage from app


This code can also mean there is a failed throttle actuator or failed throttle position switch. Not sure what you mean by "app no voltage". Was a meter used to confirm no power at the switch?

Jul 26, 2016 | 2003 GMC Yukon

1 Answer

What fixes codes p1515


Throttle Body Sensor or your accelerator pedal is the cause of code P1515. Your GMC or Chevy truck gas pedal is controlled by the vehicle's computer. I know what a idiotic feature.. But replace that & clean or replace your mass airflow sensor as well... Problems resolved!!!

Jul 04, 2014 | 2003 GMC Yukon Denali

2 Answers

Reduced engine power, service traction control, service stabilitrak


First of all a scan tool is need for this not a code reader, you need to view scan data after you find what code is stored in the PCM. It could have a problem with the powertrain control module, wiring, or the Accelerator Pedal Position (APP) Sensors. Here are a few codes that could set .
DTC P2120: Accelerator Pedal Position (APP) Sensor 1 Circuit

DTC P2122: Accelerator Pedal Position (APP) Sensor 1 Circuit Low Voltage

DTC P2123: Accelerator Pedal Position (APP) Sensor 1 Circuit High Voltage

DTC P2125: Accelerator Pedal Position (APP) Sensor 2 Circuit

DTC P2127: Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage

DTC P2128: Accelerator Pedal Position (APP) Sensor 2 Circuit High Voltage

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

Oct 02, 2012 | 2008 Chevrolet Tahoe LS

1 Answer

2004 GMAC Yukon - check engine light went on while driving followed by lack of vehicle power. What might the problem be?


Go to your local parts store,(Advance Auto, Napa, Autozone) and get the codes read for free and they can help somewhat of what the code means. If they can't tell you what the code means tell us what the code is and we can help from there.

Jun 10, 2011 | 2003 GMC Yukon Denali

1 Answer

What does rfa2 battery low mean on 03 Yukon


Some remotes are numbered 1 or 2 on the back.

(Driver 1, Driver 2)

Remote - Function - Actuation (RFA)

Time to replace the battery soon on the remote, it set a code in the BCM and all its doing now is reminding you. Every time you use the remote, it will set another code and keep doing until it gets a different code indicating the remote has a good battery in it.
Thank you for using fixya and good luck.

May 17, 2010 | 2003 GMC Yukon

1 Answer

Check engine lite is on, power lost lite is on. code p1276comes up. replaced throttle body, but no change. volts at vac fuse 14 both sides. will not accelerate over 1800 rpm's. 2004 trailblazer with 6cyl.


Your CODE P1276 refer to the Acelerator Pedal Position, Sensor 1 Circuit Range Performance.

Probable cause: Wiring, APP or ECM


GM - P1271 Accelerator Pedal Position Sensor 1-2 Correlation

I also found this... though its for Trailblazers... but may give you a clue:
Reduced Engine Power Message and/or Check Engine Light with any Combination of the following DTCs: P0107 P0112 P0122 P0452 P1120 P1220 P1221 P1271 P1275 P1280 P1481 P1515 P1540 P1633 P1635 P1639 P1682 #PIP3192 - (Oct 18, 2004)

Reduced Engine Power Message and/or Check Engine Light with any Combination of the Following DTCs: P0107 P0112 P0122 P0452 P1120 P1220 P1221 P1271 P1275 P1280 P1481 P1515 P1540 P1633 P1635 P1639 P1682 PCM Repeat.

The following diagnosis might be helpful if the vehicle exhibits the symptom described in the PI.

Condition/Concern:
Reduced engine power message and/or check engine light with any combination of the following DTCs: P0107 P0112 P0122 P0452 P1120 P1220 P1221 P1271 P1275 P1280 P1481 P1515 P1540 P1633 P1635 P1639 P1682

Recommendation/Instructions:
If the SI diagnostics did not isolate a concern, the following information may be helpful:
- Inspect the main engine wiring harness between the PCM and the generator assembly for a potential short to ground. There is a metal wiring harness retainer in this area that secures the main engine harness. If the harness conduit is mispositioned, some of the wiring may become exposed and chaff on the harness retainer. This may eventually cause the exposed circuit to short to ground.

- Inspect the 3 harnesses that connect to the PCM for potential shorts to ground on the metal PCM mounting bracket, just below the PCM. There are plastic harness retainers on the PCM bracket that secure the harnesses to the PCM bracket. If the harness conduit is mispositioned, some of the wiring may become exposed and chaff on the PCM bracket. This may eventually cause the exposed circuit to short to ground.

- If a chaffed circuit is found in either of the above locations, repair the circuit using the necessary SI procedures. Once the circuit is repaired, tape the area of the affected area of the harness to prevent the wires from becoming exposed in the future and secure the harness using the original harness retainer.

This applies to 04:
- 4.2L 5.3L LL8 LM4 Engine with DTC - P2120 or P2122 or P2123 or P2125 or P2127 or P2128 - kw low MIL pedal power reduced #PI01746 - (Feb 17, 2004)
- 4.2L 5.3L LL8 LM4 Engine with DTC - P2120 or P2122 or P2123 or P2125 or P2127 or P2128.

When servicing the vehicle with the VIN you entered, the following diagnosis might be helpful if the vehicle exhibits the described symptoms.

Condition/Concern:
MIL light on. Reduced Power message on DIC. Possibles DTCs P2120 and/or P2122, P2123, P2127, and P2128.

Recommendation/Instructions:
The APP harness is clipped to the accelerator pedal bracket. The harness may chaff on the upper portion of the accelerator pedal causing a short to ground. Verify the harness is not chaffing on the accelerator pedal. After repairing the short, reposition the harness to ensure no contact between the harness and the accelerator pedal.

Hope helpes.

Feb 09, 2010 | 2004 Chevrolet TrailBlazer

1 Answer

My engine light comes on and I get an


well you need to go to local part house and get the code out most will let you know what the codes are but sound like your truck is going in to limb mode to save tranmission or somthig any way come back with the code can help better

Sep 28, 2009 | 2003 GMC Yukon XL

2 Answers

Check engine light on 2005 gmc youkon


engine lght is on - lack of power

Jul 04, 2008 | 2005 GMC Yukon

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