P1231 – BMW DTC

BMW DTC P1231 – Fuel Tank Pressure/Temperature Sensor Circuit/Open

DTC P1231 meaning on BMW

DTC P1231 on a BMW indicates a fault with the Fuel Tank Pressure/Temperature Sensor Circuit, specifically an open circuit. This means that the sensor is not providing the expected data to the engine control module, which can lead to issues with fuel delivery and emissions control.

BMW DTC P1231 symptoms

Symptoms of DTC P1231 on a BMW may include:

• Check Engine Light illuminated
• Possible decrease in fuel efficiency
• Engine running rough or stalling
• Issues with starting the vehicle

BMW DTC P1231 causes

The common causes of DTC P1231 on a BMW include:

• Faulty Fuel Tank Pressure/Temperature Sensor
• Wiring or connector issues in the sensor circuit
• Corrosion or damage to sensor components

BMW DTC P1231 seriousness

While DTC P1231 may not cause immediate drivability issues, it can affect the performance and emissions of the vehicle. Ignoring this fault can lead to potential long-term damage and increased fuel consumption.

How to diagnose DTC P1231 on BMW

To diagnose DTC P1231 on a BMW, you can follow these steps:

1. Use a diagnostic scanner to retrieve the fault code
2. Inspect the wiring and connectors related to the Fuel Tank Pressure/Temperature Sensor
3. Test the sensor for proper operation using a multimeter
4. Check for any signs of physical damage or corrosion on the sensor

How to fix DTC P1231 on BMW

To fix DTC P1231 on a BMW, you can try the following:

1. Replace the Fuel Tank Pressure/Temperature Sensor if faulty
2. Repair any damaged wiring or connectors in the sensor circuit
3. Clean or replace any corroded sensor components

How to erase DTC P1231 on BMW

To erase DTC P1231 on a BMW, you can use a diagnostic scanner to clear the fault code from the engine control module’s memory. Once the issue has been fixed, clearing the code will reset the Check Engine Light.

Recommended tools & DTC Scanners for BMW

Best Diagnostic App for modern BMWs: BimmerLink

Recommended Bluetooth adapter for Bimmerlink: OBDLink CX

Cable adapter for Bimmerlink: Enet Cable USB Type C

For older BMWs we recommend: Autel AutoLink AL319 (2024 version)

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

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