What does Error Code P0222 mean?
Critical Issue
DTC Code P0222 indicates a Throttle/Pedal Position Sensor/Switch 'B' Circuit Low Input, where the Throttle Position Sensor (TPS) is sending an excessively low voltage signal to the Engine Control Module (ECM). This affects the ECM's ability to accurately judge the throttle valve's opening angle, impacting throttle control.
What are the symptoms of Error Code P0222?
- Engine Light ON: The check engine light or service engine soon warning light illuminates, indicating a potential issue with the throttle/pedal position sensor/switch 'B' circuit.
- No Throttle Response: The vehicle may experience a lack of throttle response, which can be linked to the throttle/pedal position sensor/switch 'B' circuit receiving a low input signal.
What causes Error Code P0222?
- The throttle position sensor may be malfunctioning, leading to incorrect readings and triggering the error code.
- An open or shorted throttle position sensor harness can disrupt the signal, causing the circuit to register a low input.
- Poor electrical connections in the throttle position sensor can result in intermittent or weak signals, affecting the sensor's performance.
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How to fix Error Code P0222?
- Initial Inspection: Inspect the throttle body and pedal position sensor for any visible damage or loose connections. Ensure that all wiring and connectors are secure and free from corrosion.
- Check Voltage Supply: Using a multimeter, measure the voltage supply to the Throttle/Pedal Position Sensor B. The voltage should be within the manufacturer's specified range. A low voltage reading may indicate a wiring issue or a faulty sensor.
- Test Sensor Ground: Verify the ground connection for the sensor. A poor ground can cause low input signals. Ensure the ground is clean and secure.
- Sensor Output Signal Test: With the ignition on, measure the output signal from the sensor. The signal should change smoothly as the throttle is moved. A constant low signal indicates a potential sensor failure.
- Inspect Related Codes: Review related codes P0220, P0221, P0223, and P0224 for additional context. These codes can provide further insight into the nature of the issue.
- ECU Check: If all previous steps are inconclusive, inspect the Engine Control Unit (ECU) for any faults or software updates that may address the issue.