Question about 2005 Pontiac Grand Prix

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Reduced engine power signal throwing out codes p1125 and p2138. what do i do to fix the problem?

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  • Anonymous Mar 26, 2014

    Getting reduced engine power message after replacing battery

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There is a GM service bulletin on this particular item. basically covers both codes your getting.
#07-06-04-019A: 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)

Posted on Jul 03, 2009

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2005 GRAND PRIX IT SHUTS OFF WHEN TAKEN OF FAST (REDUCE ENGINE POWER) ???????

Posted on Jun 26, 2011

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6ya6ya
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Posted on Jan 02, 2017

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08 grand prix reduced power codes p1125 p2120 p2138 replaced acc pedal 4/27/16 fixed till now doing it again...


What brand part did you use ? Dorman ? OE ? Did you test the circuitry ? Did you just read the code an replace the part ? 2009 Chevy Silverado P2138 Accelerator Pedal Position Chevy is same as pontiac ! Drive by Wire training

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04 chevy trailblazer Reduced engine power


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Need to know what some codes r for a 2006 pontiac grand prix


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P1125 and P2138 are both accelerator pedal position sensor codes

Feb 25, 2015 | 2006 Pontiac Grand Prix

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HELP!! Many codes..


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May 06, 2014 | 2006 Pontiac Grand Prix

3 Answers

Error code p2138


Here is the definition. You may need to have someone check the accelerator pedal position sensor and the circuit.

P2138 NISSAN Description The Accelerator Pedal Position (APP) sensor is installed on the upper end of the accelerator pedal assembly. The sensor detects the accelerator position and sends a signal to the Engine Control Module (ECM).
Accelerator pedal position sensor has two sensors. These sensors are a kind of potentiometers which transform the accelerator pedal position into output voltage, and emit the voltage signal to the ECM.
In addition, these sensors detect the opening and closing speed of the accelerator pedal and feed the voltage signals to the ECM. The ECM judges the current opening angle of the accelerator pedal from these signals and controls the throttle control motor based on these signals.
Idle position of the accelerator pedal is determined by the ECM receiving the signal from the accelerator pedal position sensor. The ECM uses this signal for the engine operation
such as fuel cut.
Read more: http://engine-codes.com/p2138_nissan.html#ixzz26J3D2x8s

Sep 12, 2012 | 2010 Nissan Versa 1.8

1 Answer

I have p0700 and p0705 codes, p0455, p1125, and p2125 and p2138 codes


P0700

The transmission of a vehicle which has suffered a transmission problem will send the P0700 code to the vehicle engine control module (ECM)

P0705 Transmission Range Sensor Circuit Malfunction

Possible causes

- Open or short park/neutral position switch circuit
- Poor park/neutral position switch circuit connection
- Misadjusted park/neutral position switch
- Park/neutral position switch may be faulty

P0455. A code p0455 most likely means one or more of the following has happened:

A loose or improperly affixed gas cap

A non-conforming gas cap (i.e. not factory/original brand)

Other leak or damaged piece in EVAP system

P1125 Accelerator Pedal Position (APP) System

P2125 Throttle/Pedal Position Sensor/Switch "E" Circuit

P2138 Throttle possition sensor


Jun 23, 2011 | Chevrolet Equinox Cars & Trucks

1 Answer

The sunroof leaked and soaked the inside of my 06 equinox .when I started it the next day the reduced engine power & traction control light came on.I scanned it & got P0700 mil along with...


SOUNDS TO ME LIKE YOU MIGHT HAVE ELETRICAL ISSUES,700 IS A TRANSMISSION CODE,1125 IS REDUCED POWER AND 120 IS YOUR TPS,I WOULD CHECK THE TPS FIRST IT CAN CAUSE ALL OTHER CODES ASWELL,LET ME KNOW.









TIM

Dec 25, 2010 | 2006 Chevrolet Equinox

1 Answer

I have a p2138 code and when engine light comes on it starts losing power and you to shut off engine and restart and it will go for awhile and it will happen again. next day no problem


There is a GM Technical Service Bulletin (TSB) on this issue, below is a summary;

#07-06-04-019A: 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 a brief period. 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 or inside the IP. Water intrusion into these areas could cause an electrical short in the APP circuits setting a P2138 code.

Correction

Note: Make sure that no add-on/aftermarket equipment is electrically connected to the APP signals or to the other ECM/PCM five volt reference or return lines. These can generate false P2138 and/or other ETC System DTCs. If there are other engine DTCs besides P2138, such as MAP sensor faults (i.e. P0107, P0108), resolve these first before attempting to diagnose P2138 DTCs.

Important: Refer to DTC P2138 in SI to confirm that the ETC pedal is operating correctly.

Locate the IP to body harness connector, which may be located in and around the left hand kick panel area or inside the IP. Check to see if there is a water leak into the area and repair as necessary. Use a water hose to determine the source of a water leak and effectiveness of repair. Some examples of potential water leaks are: A-pillar seals, sunroof drain lines (if so equipped) and windshield/cowl sealing. Finally, repair or replace the IP to body harness connector, making sure no corrosion or debris is left on or between the terminals.

Sep 07, 2010 | Chevrolet TrailBlazer Cars & Trucks

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