The P2137: Throttle/Pedal Position Sensor/Switch B / C Voltage Correlation refers to a discrepancy in the voltage signals between throttle/pedal position sensors ‘B’ and ‘C’. This can be caused by faulty sensors, wiring issues, or sensor calibration problems, leading to throttle response issues.
P2137 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P2137: Throttle/Pedal Position Sensor/Switch B / C Voltage Correlation |
| Is it serious? | Yes, it can affect throttle control and lead to drivability problems. |
| Possible causes | – Voltage correlation issues between throttle/pedal position sensors ‘B’ and ‘C’ – Faulty sensors or wiring – Sensor calibration issues |
| How to diagnose? | – Compare voltage readings between sensors ‘B’ and ‘C’ – Test both sensors and check for faults – Inspect wiring and connections |
P2137 Meaning
The P2137 code indicates that the voltage signals from throttle/pedal position sensors ‘B’ and ‘C’ do not correlate as expected. These sensors monitor the throttle and pedal positions and send corresponding signals to the engine control module (ECM). A mismatch in these signals can cause erratic throttle response, leading to performance and drivability issues.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for any other related codes that might provide more context or additional insights into the problem. | OBD-II Scanner |
| Compare Voltage Readings | Use a multimeter or diagnostic tool to measure and compare the voltage outputs from throttle/pedal position sensors ‘B’ and ‘C’. Verify that both sensors are providing readings within the manufacturer’s specifications and that the voltages correlate. | Multimeter, Diagnostic Tool |
| Test Sensors for Faults | Perform diagnostic tests on both sensors to ensure they are functioning correctly. Replace any faulty sensors. | Multimeter, Diagnostic Tool |
| Inspect Wiring and Connections | Visually inspect the wiring and connectors for both sensors ‘B’ and ‘C’ to check for any signs of damage, loose connections, or corrosion. Repair or replace as needed. | Flashlight, Multimeter |
| Verify Calibration Settings | Check that both sensors are properly calibrated according to the manufacturer’s specifications. If necessary, recalibrate the sensors. | Diagnostic Tool, Vehicle Manual |
| Clear the Code and Test Drive | After making repairs or adjustments, clear the code using an OBD-II scanner and take the vehicle for a test drive to ensure the issue is resolved. | OBD-II Scanner |
| Recheck for Codes | After the test drive, re-scan the vehicle to ensure the P2137 code has not returned. | OBD-II Scanner |
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Hi, I am Juraj “Yuri” Lukacko. I got frustrated by unhelpful and scammy mechanics, so I decided to learn everything about car diagnostics myself. I test dozens of new car diagnostic tools every month along with learning new strategies to fix and customize cars. About Juraj Lukacko (Yuri)