Code Definition

P2136 — Throttle Position Sensor / Switch A/C Voltage Correlation

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P2136

P2136 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P2136 is stored, the module has detected a correlation fault — two sensors that should track each other have diverged beyond tolerance; and a sensor-related fault — the reported value from the named sensor is out of spec.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P2136 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The Powertrain Control Module (PCM) continuously compares the voltage signals from Throttle Position Sensor (TPS) circuits A and C to verify they maintain a fixed, calibrated relationship across the full throttle range. DTC P2136 is set when the PCM detects that the correlation between TPS A and TPS C deviates beyond the allowable tolerance for a specified period. On electronic throttle control systems the two sensors are built into a shared TPS assembly on the throttle body and typically sweep in opposite directions or on different slopes so that any single failure can be recognised as an imp...

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