2005 Honda Pilot P0137, P2138, P0300 & P0302-P0306 Misfire Issues: Diagnosis and Fixes
Hello, I recently encountered multiple engine trouble codes on my 2005 Honda Pilot, which have been causing significant driving issues. Using an OBD-II scanner, I retrieved the following diagnostic trouble codes (DTCs): - P0137: O2 Sensor Circuit Low Voltage - Bank 1, Sensor 2 - P2138: Throttle/Pedal Position Sensor/Switch D/E Voltage Correlation Issue - P0300: Random/Multiple Cylinder Misfires Detected - P0302, P0-than 6: Cylinder 2, 3, 4, 5, and 6 Misfire Detected My mother typically drives the vehicle and reported that at times the car suddenly loses acceleration, begins to slow down, and all dashboard warning lights illuminate. This behavior aligns with symptoms associated with the P2138 code. As a non-technical user, I’m seeking advice on how to diagnose and resolve these issues. Any insights or step-by-step troubleshooting tips would be greatly appreciated. Thank you for your help.
Start by addressing the P2138 code, as it is likely contributing to the vehicle's performance issues.\n\nRefer to this forum thread for detailed causes and solutions related to P2138:\n\nPotential Causes of P2138 DTC:\n- Corroded or loose female terminals on the throttle body pigtail connector\n- Bare wires in the pigtail causing a short to ground\n- Distorted throttle body top cover, preventing proper gear movement\n- Faulty electronic throttle body assembly\n- Failed accelerator pedal sensor or its wiring\n- Engine control module (ECM) failure\n- TPS sensors failing to correlate within a few seconds; the ECM may require relearn phase cycling or dealer reprogramming to restore throttle response.\n\nFor troubleshooting steps, ensure the throttle body is clean and properly connected. Check for visible damage or corrosion on wiring harnesses. If issues persist, consider visiting a dealership for professional diagnosis and repair.\n\nRead more: P2138