P2137 OBD-II Trouble Code: A Camshaft Position Actuator Control Circuit Low Bank 2

Check Engine Light

What the P2137 code means?

P2137 is an OBD-II generic code for the engine control module (ECM) detecting the throttle pedal position sensors B and C voltages do not correlate to each other for return voltage to the ECM.

What causes the P2137 code?

  • The ECM monitors the throttle position sensor (TPS) and has detected the B and C sensors signal return to the ECM do not correlate with each other.

  • One of the sensors has an internal fault.

  • The sensor circuit or connector has a loose or broken connection.

What are the symptoms of the P2137 code?

  • The Check Engine light will be illuminated and the code is set in ECM memory as a fault. The light will stay on unless the problem goes away for more than three running cycles.

  • The TPS has redundant sensors for the throttle position and may not have a drive complaint on some vehicles.

  • On some vehicles, the vehicle may go into limp home mode and limit the throttle opening and throttle response.

How does a mechanic diagnose the P2137 code?

  • Scans for codes and documents the code in the ECM and looks at the freeze frame data for failure.

  • Checks the TPS wiring and connection for loose or corroded connectors.

  • Scans and views data from the TPS while operating throttle to see which sensor is failing or not correlating.

  • Follows the manufacturer pinpoint tests for the diagnosis and replacement of the TPS.

  • On some vehicles, the two TPS sensors B and C may be inside the same sensor and would be replaced as a single unit.

Common mistakes when diagnosing the P2137 code?

  • Clearing ECM memory codes before checking the freeze frame data for the main failure problem, so the failure may be duplicated and repaired

  • Failing to clear the ECM codes after the codes are fixed

  • Replacing the TPS without verifying the sensor has a problem

How serious is the P2137 code?

Code P2137 is a problem with the TPS and this can cause no throttle control problems and should be fixed immediately. The TPS is needed to control the throttle opening and closing.

What repairs can fix the P2137 code?

  • Replace the TPS assembly if it is a single unit for both sensors or replace the failed sensor if they are two separate sensors.

  • Repair the connector pins of corrosion or loose connections at the TPS or the ECM.

Additional comments for consideration regarding the P2137 code

Code P2137 is for a code that two TPS sensor signals do not agree with each other on throttle movement. Most vehicles will have a single sensor assembly that houses multiple sensors in one. It is replaced as an assembly.

Need help with a P2137 code?

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The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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