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Dan
Dan, Technician
Category: Chevy
Satisfied Customers: 23590
Experience:  Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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I have a 2007 Chevy Impala LT3, 3.9l engine and have gotten

Customer Question

Hi, I have a 2007 Chevy Impala LT3, 3.9l engine and have gotten a P2135 error code, the error code indicates a throttle position sensor malfunction, but the parts guys at all 3 of my 3 local parts stores say I don't have a TPS, but need an accelerator pedal position sensor. Are they right? Is it just the same thing with a different name? I found TPS listings online for my car.
Submitted: 8 months ago.
Category: Chevy
Expert:  Dan replied 8 months ago.

Hello, my name is***** throttle position sensor is built into the throttle body assembly. This is about a $400 job to have repaired at a shop otherwise you can buy throttle body off ebay and install yourself for cheapest option. Let me know if you have more questions or if you would like replacement instructions. Thanks!

Customer: replied 8 months ago.
are you saying I need a throttle body assembly and not a accelerator position sensor? Do they have different error codes?
Expert:  Dan replied 8 months ago.

Yes, you need the throttle body assembly and not the accelerator position sensor. If accelerator position sensor was problem you wouldn't be getting this code. This code set when ECM detected the throttle position indicated by TP sensor 1 exceeded the throttle position indicated by TP sensor 2 by more than a predetermined value. The Throttle Actuator Control (TAC) system monitors the throttle position with a pair of sensors. Let me know if you have more questions, thanks.