P2135 – Throttle/Pedal Position Sensor A/B Voltage Correlation

Description

The ECM detects inconsistent voltage signals between TPS/APP sensor A and B, which prevents accurate throttle control.

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Symptoms

Limp mode
Poor acceleration
Unstable idle
No throttle response

Causes

Faulty TPS/APP sensors
Wiring faults
Throttle body failure
PCM/ECM signal error

Diagnosis

Check TPS/APP sensor voltages
Inspect wiring
Test throttle body movement
Scan for related ETC codes

Repair

Replace TPS/APP sensors
Replace throttle body
Repair wiring
Replace PCM/ECM if needed