P2135 Chevrolet - Throttle/Pedal Position Sensor/Switch 'A'/'B' Voltage Correlation
- Throttle Position Sensor harness is open or shorted
- Throttle Position Sensor circuit poor connection
- Faulty accelerator pedal position sensor
2008-2009 Chevrolet TrailBlazer
2008-2011 Chevrolet Avalanche, Colorado, Express, Silverado, Suburban, Tahoe
2008-2011 Chevrolet Tahoe Two-Mode Hybrid
2009-2011 Chevrolet Silverado Two-Mode Hybrid
Factory Service bulletin P2135
The throttle Position (TP) sensors 1 and 2 are potentiometer type sensors each with 3 circuits.
- A 5 - volt reference circuit.
- A low reference circuit.
- A signal circuit
The TP sensor are used to determine the throttle plate angle for various engine management systems. The control module provides each TP sensor a 5-volt reference circuit and a low reference circuit. The TP sensors then provide the control module whit signal voltage proportional to the throttle plate movement. Both TP sensor signal voltage are low at close throttle and increase as the throttle opens. When the control module detects that the TP sensor 1 signal and TP sensor 2 signals disagree or the signal voltages are outside the predetermined range, the P2135 code is set.
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