Code P2127

Tiny
EZEX
  • MEMBER
  • 2009 CHEVROLET IMPALA
  • 3.9L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 95,000 MILES
Received error code p2127 'Throttle/Pedal Position Sensor/Switch 'E' Circuit Low 'in my car about 3 months ago. Replaced the gas pedal. It fixed the problem for a few months but now it just came back again. Any ideas?
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Sunday, October 10th, 2021 AT 9:16 PM

2 Replies

Tiny
SQM
  • EXPERT
Hello,

The code: P2127- Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage

When the ECM detects that the APP sensor 2 voltage is less than 0.16 volt it will trigger that code.
There is a good change the issue is wiring related.

https://www.2carpros.com/articles/how-to-check-wiring

I have attached the trouble shooting steps for the code P2127 below.

Please go thru the steps as it can help you determine the issue.

Let me know of any questions.
Thank you.
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Sunday, October 10th, 2021 AT 10:37 PM
Tiny
JIS001
  • EXPERT
Hi, just to jump in. Sometimes correlation faults like this will be due to dirty throttle body bores. The voltage may not update on the throttle fast enough from the gunk verses what the computer sees at the pedal.

I would start with a throttle body service first since it is the easiest and cheapest repair. If you can remove the throttle without unplugging it that would be even better. In fact, I would recommend you disconnect the battery as well. Here is a link on how to service it:

https://www.2carpros.com/articles/throttle-actuator-service

Let us know if this help.
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Monday, October 11th, 2021 AT 12:46 PM

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