P0123 – Land Rover DTC

Land Rover DTC P0123 – Throttle Position Sensor High Out of Range Fault

DTC P0123 meaning on Land Rover

1. DTC P0123 indicates a fault with the Throttle Position Sensor (TPS) on a Land Rover.
2. The TPS is responsible for monitoring the position of the throttle valve and sending this information to the engine control module (ECM).
3. A high out of range fault means that the signal from the TPS is higher than expected by the ECM.

Land Rover DTC P0123 symptoms

• Check Engine Light (CEL) illuminated on the dashboard.
• Reduced engine power or acceleration response.
• Stalling or rough idling.

Land Rover DTC P0123 causes

• Faulty Throttle Position Sensor.
• Wiring or connector issues in the TPS circuit.
• ECM malfunction.

Land Rover DTC P0123 seriousness

1. Ignoring DTC P0123 can lead to drivability issues and potential safety concerns.
2. Continued driving with a faulty TPS can cause further damage to the engine or other components.

How to diagnose DTC P0123 on Land Rover

1. Use a diagnostic scanner to retrieve the trouble code and check for any additional codes present.
2. Inspect the TPS wiring and connector for any visible damage or corrosion.
3. Test the TPS using a multimeter to verify its resistance values and signal output.

How to fix DTC P0123 on Land Rover

• Replace the Throttle Position Sensor if it is found to be faulty.
• Repair any damaged wiring or connectors in the TPS circuit.
• If the ECM is determined to be the issue, it may need to be reprogrammed or replaced.

How to erase DTC P0123 on Land Rover

1. After fixing the underlying issue causing DTC P0123, use a diagnostic scanner to clear the trouble code from the ECM’s memory.
2. Ensure that the repair has been successful by driving the vehicle and checking for any recurrence of the fault code.