Question

2010 Chevrolet HHR with engine code P2135. Service traction control light shoots on reduced engine speed RPMs and transmission rattle while turning over

Answer 1

Hi there,

This code indicates an issue with the throttle/pedal position sensor. Here is some info for you.

P2135 CHEVROLET - Throttle/Pedal Position Sensor/Switch 'A'/'B' Voltage Correlation
Read more: https://www.autocodes.com/p2135_chevrolet.html