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Service engine light on, error code p2138 and p2122, throttle pedal positioning sensor on a 2003 infiniti m45

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Typically on these vehicle the throttle body will need to be replaced to correct the issue . There is a sensor built into the throttle body assembly that measures throttle angle to send to various modules . Sometime if you have a good mechanic they can desconnect the throttle body . Clean the inside of the housing carefully plug everything back up and use a scan tool which has Nissan software to RE learn the throttle position at idle. I have done this many many times but sometimes the parts are just bad . Goodluck

Posted on Nov 13, 2014

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Posted on Jan 02, 2017

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I change the App on a 2008 Acura tl and the check engine light came back with the same codes p2138 p2122 what else can cause the codes to come back on


code p 2138 refers to throttle position (TP) sensor/switch D/E-- voltage correlation=== causes --- wiring -- tp sensor /switch

code p 2122 refers to accelerator pedal (APP) sensor /switch D --low input===causes --wiring short to ground --APP sensor/ switch

also refers to engine control module (ECM) , idle control ---high input===causes ---wiring short to positive --TP sensor--ETS control valve (ETS----electronic throttle system)

Jan 10, 2017 | Acura Cars & Trucks

1 Answer

Accelerator pedal position sensor


have the throtthle body cleaned and then decide if you need it replaced may be dirty

Oct 08, 2013 | 2004 Dodge Durango

1 Answer

I HAVE A 2005 NISSAN MICRA ESSENZA CAR,,,,, when


this one will work. http://www.ebay.co.uk/itm/2003-Nissan-Micra-Electronic-Accelerator-Pedal-/321195223272?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item4ac8ba28e8 dont know if you are in the uk

Oct 07, 2013 | Nissan Micra Cars & Trucks

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

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

P2121 and p2122


P2121 Code is throttle/pedal position sensor/switch D circuit range/performance
P2122 throttle/pedal position sensor/switch low circuit
Bad pedal maybe, does it return to idle?

Jun 05, 2012 | Cars & Trucks

2 Answers

I have a 2010 Chevy impala. Reduced engine power and check engine light also comes on but won't stay on. Codes are P2138 P2122 P0455


Hi Rosalee_IM,
The codes your vehicle is storing are for low voltage from your accelerator pedal position sensor and a gross evaporative emission leak. The code P2122 and P2138 are directing you to test the accelerator pedal position circuit and/ or sensor. This is the cause of the reduced power concern you are feeling.The P0455 is telling you there is a large leak in the evaporative emission system. The most common cause for this code is a loose or incorrectly installed gas cap.I hope this helps clarify the concerns you are experiencing. If you'd like more information on how to trouble shoot the problems,drop me a line. Please include the model Impala you have,(LS,LT or LTZ) and the engine size. I will do my best to get back to you as soon as possible.Thanks, Chuck

May 03, 2012 | 2010 Chevrolet Impala

2 Answers

Code p2138


P2138 is Throttle Pedal Position Sensor/ Switch D / E Voltage Correlation. Replace the Throttle Pedal Position Sensor/Switch.Remember to have the set code Cleared from the cars computer, this will turn off the check engine light and reset it. Good Luck and have a good XMASS.

Dec 17, 2010 | 2006 Nissan Altima

2 Answers

I have a Nissan Frontier with accelerator & throttle problems. I have sensor codes p2122 & p2138. How do i fix this problem? Is it a self fix problem? HELP!


Throttle/Pedal Position Sensor/Switch "D" Circuit Low
P2122 - APP Sensor 1 Low Input

Probable Causes:
1 - Failed APP Sensor 1
2 - Open or short circuit condition
3 - Poor electrical connection

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

P2138 - APP Sensor Performance Condition Fault

Probable Causes:
1 - Failed APP Sensor
2 - Open or short circuit condition
3 - Poor electrical connection
I hope this helps you and thank you

Feb 14, 2010 | Nissan Frontier Cars & Trucks

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