P204D – BMW DTC

BMW DTC P204D – Reductant Pressure Sensor Circuit High

DTC P204D meaning on BMW

DTC P204D on a BMW indicates a fault with the reductant pressure sensor circuit. The reductant pressure sensor is responsible for monitoring the pressure of the diesel exhaust fluid (DEF) in the reductant system. A high circuit voltage is detected, suggesting a potential issue with the sensor or its wiring.

BMW DTC P204D symptoms

Symptoms of DTC P204D on a BMW may include:

• Check Engine Light illuminated
• Reduced engine performance
• Possible DEF system warnings

BMW DTC P204D causes

Common causes of DTC P204D on a BMW include:

• Defective reductant pressure sensor
• Wiring or connector issues in the sensor circuit
• Corrosion or damage to sensor components

BMW DTC P204D seriousness

While DTC P204D may not cause immediate drivability issues, it is important to address the underlying problem to ensure proper operation of the DEF system. Ignoring this fault could lead to increased emissions and potential long-term damage to the vehicle’s exhaust system.

How to diagnose DTC P204D on BMW

To diagnose DTC P204D on a BMW, you can follow these steps:

1. Use a diagnostic scanner to retrieve the fault code and freeze frame data
2. Inspect the reductant pressure sensor and its wiring for any visible damage
3. Test the sensor’s voltage and resistance to determine if it is functioning correctly
4. Check for any related codes or issues in the DEF system

How to fix DTC P204D on BMW

To fix DTC P204D on a BMW, you can try the following:

1. Replace the reductant pressure sensor if it is found to be faulty
2. Repair any damaged wiring or connectors in the sensor circuit
3. Clean or replace any corroded sensor components
4. Clear the fault code and test drive the vehicle to ensure the issue is resolved

How to erase DTC P204D on BMW

To erase DTC P204D on a BMW, you can use a diagnostic scanner to clear the fault code from the vehicle’s memory. After making any necessary repairs, clearing the code will reset the Check Engine Light and allow you to monitor the system for any recurring issues.

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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