Error Code P2135
Critical Issue
DTC Code P2135 indicates a discrepancy between Throttle Position Sensors 1 and 2, where the Engine Control Module (ECM) detects a disagreement in their readings exceeding 7-10% for more than 1 second. This code is triggered when the throttle position sensor signals, transmitted from the throttle body to the ECM, are not plausible.
What symptoms indicate Error Code P2135?
- Engine Light ON: The check engine light or service engine soon warning light illuminates, indicating a potential issue with the throttle position sensors.
- Reduced Engine Performance: The vehicle may experience reduced power or sluggish acceleration due to the throttle position sensors providing inconsistent data to the engine control module.
- Erratic Idle: The engine may idle erratically, with fluctuations in RPMs, as the throttle position sensors fail to provide accurate readings.
- Poor Fuel Economy: Inaccurate throttle position sensor readings can lead to inefficient fuel usage, resulting in decreased fuel economy.
What causes OBD code Error Code P2135?
- The throttle body assembly may be malfunctioning, leading to inconsistent readings from the throttle position sensors.
- An open or shorted throttle body harness can disrupt the communication between the sensors and the ECM, causing the error code.
- Poor electrical connections in the throttle body circuit can result in intermittent or incorrect signals being sent to the ECM.
- A faulty Engine Control Module (ECM) can misinterpret sensor data, leading to the detection of implausible throttle position readings.
How to fix OBD code Error Code P2135?
- Initial Inspection: Inspect the throttle body and connectors for any visible damage or corrosion. Ensure that the wiring harness is intact and properly connected.
- Check Throttle Position Sensors: Use a multimeter to measure the voltage output of both Throttle Position Sensors (TPS) 1 and 2. Compare the readings to the manufacturer's specifications to ensure they are within range.
- Verify Sensor Alignment: Ensure that the throttle position sensors are properly aligned and calibrated. Misalignment can cause discrepancies in sensor readings.
- Test Sensor Circuitry: Perform a continuity test on the wiring between the TPS and the Engine Control Module (ECM) to check for any open or short circuits.
- Examine Related Codes: Review related codes such as P0120, P0122, P0123, P0220, P0222, and P0223 to identify any additional issues with the throttle or accelerator pedal position sensors.
- ECM Evaluation: If all sensors and wiring are functioning correctly, consider evaluating the ECM for any faults or software updates that may resolve the issue.