The P2136: Throttle/Pedal Position Sensor/Switch A / C Voltage Correlation refers to an issue where the voltage signals between throttle/pedal position sensors ‘A’ and ‘C’ do not match as expected. This can be caused by faulty sensors, wiring problems, or calibration issues, affecting throttle control and vehicle performance.
P2136 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P2136: Throttle/Pedal Position Sensor/Switch A / C Voltage Correlation |
| Is it serious? | Yes, it can lead to throttle control issues and drivability problems. |
| Possible causes | – Voltage correlation issues between throttle/pedal position sensors ‘A’ and ‘C’ – Faulty sensors or wiring – Sensor calibration issues |
| How to diagnose? | – Compare voltage readings between sensors ‘A’ and ‘C’ – Test both sensors and check for faults – Inspect wiring and connections |
P2136 Meaning
The P2136 code indicates that there is a discrepancy in the voltage signals from throttle/pedal position sensors ‘A’ and ‘C’. These sensors are responsible for monitoring throttle or pedal positions and sending corresponding signals to the engine control module (ECM). When the signals don’t correlate properly, it can lead to throttle control issues, affecting acceleration and drivability.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for additional codes that may provide more context or reveal related issues. | OBD-II Scanner |
| Compare Voltage Readings | Use a multimeter or diagnostic tool to measure and compare the voltage outputs from throttle/pedal position sensors ‘A’ and ‘C’. Ensure the readings are within the manufacturer’s specified range and correlate properly. | Multimeter, Diagnostic Tool |
| Test Sensors for Faults | Use the diagnostic tool to test both sensors for proper functionality. Ensure there are no signal irregularities or faults in either sensor. | Multimeter, Diagnostic Tool |
| Inspect Wiring and Connections | Visually inspect the wiring and connectors for both sensors ‘A’ and ‘C’ to check for any signs of damage, loose connections, or corrosion. | Flashlight, Multimeter |
| Verify Calibration | Ensure that the sensors are calibrated correctly according to the manufacturer’s specifications. Recalibrate the sensors if necessary. | Diagnostic Tool, Vehicle Manual |
| Clear the Code and Test Drive | After performing repairs or adjustments, clear the code using an OBD-II scanner and take the vehicle for a test drive to verify that the issue is resolved. | OBD-II Scanner |
| Recheck for Codes | After the test drive, re-scan the vehicle to ensure the P2136 code has not returned. | OBD-II Scanner |
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