P24E4 – BMW DTC

BMW DTC P24E4 – NH3 Sensor Circuit High

DTC P24E4 meaning on BMW

DTC P24E4 on a BMW indicates a high circuit condition in the NH3 (ammonia) sensor. The NH3 sensor is responsible for monitoring the level of ammonia in the exhaust system, which is crucial for the operation of the selective catalytic reduction (SCR) system.

BMW DTC P24E4 symptoms

Symptoms of DTC P24E4 on a BMW may include:

• Check Engine Light (CEL) illuminated
• Reduced engine performance
• Possible increase in emissions

BMW DTC P24E4 causes

Common causes of DTC P24E4 on a BMW include:

• Faulty NH3 sensor
• Wiring or connector issues in the NH3 sensor circuit
• Software or calibration issues

BMW DTC P24E4 seriousness

DTC P24E4 should not be ignored as it can lead to increased emissions and potential engine performance issues. It is important to address this fault promptly to ensure proper operation of the SCR system and to maintain compliance with emissions regulations.

How to diagnose DTC P24E4 on BMW

To diagnose DTC P24E4 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 NH3 sensor and its wiring for any visible damage or corrosion
3. Perform a circuit test to check for continuity and proper voltage levels
4. Check for any software updates or calibrations related to the NH3 sensor

How to fix DTC P24E4 on BMW

To fix DTC P24E4 on a BMW, you can try the following:

1. Replace the NH3 sensor if it is found to be faulty
2. Repair any wiring or connector issues in the NH3 sensor circuit
3. Update the software or calibration related to the NH3 sensor

How to erase DTC P24E4 on BMW

To erase DTC P24E4 on a BMW, you can use a diagnostic scanner to clear the fault code after the underlying issue has been addressed. Once the fault code is cleared, you can monitor the system for any reoccurrence of the fault.

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

Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.