Diagnostic Trouble Code
P2135 — Throttle Position Sensor A/B Voltage Correlation
Throttle Position Sensor A/B Voltage Correlation
Definition
The ECM has detected that the voltage signals from throttle position sensors A and B do not correlate properly. These dual sensors are designed to mirror each other for safety verification, and a mismatch triggers immediate protective action.
Common Causes
- Failed electronic throttle body with integrated dual sensors
- Intermittent wiring fault in TPS circuits
- Connector pin corrosion causing signal degradation
- Water intrusion into the throttle body connector