BMW DTC P24E8 – NH3 Sensor Heater Circuit High
DTC P24E8 meaning on BMW
DTC P24E8 on a BMW refers to a fault in the NH3 (ammonia) sensor heater circuit. The NH3 sensor is a crucial component in the vehicle’s emissions control system, responsible for monitoring the level of ammonia in the exhaust gases to ensure compliance with emissions regulations.
BMW DTC P24E8 symptoms
Symptoms of DTC P24E8 on a BMW may include:
- Check Engine Light (MIL) illuminated
- Reduced engine performance
- Increased fuel consumption
- Possible ammonia smell from the exhaust
BMW DTC P24E8 causes
Common causes of DTC P24E8 on a BMW include:
- Faulty NH3 sensor heater
- Wiring or connector issues in the NH3 sensor circuit
- Software glitches in the engine control module (ECM)
BMW DTC P24E8 seriousness
DTC P24E8 should not be ignored as it can lead to increased emissions and potential harm to the environment. Additionally, prolonged driving with this fault may cause damage to other emission control components.
How to diagnose DTC P24E8 on BMW
To diagnose DTC P24E8 on a BMW, a mechanic would typically:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the NH3 sensor and its wiring for any visible damage
- Test the NH3 sensor heater circuit for proper voltage and resistance
- Check for any software updates for the ECM related to the NH3 sensor
How to fix DTC P24E8 on BMW
To fix DTC P24E8 on a BMW, the following steps may be taken:
- Replace the faulty NH3 sensor if it is determined to be the cause
- Repair any damaged wiring or connectors in the NH3 sensor circuit
- Update the ECM software to the latest version
- Clear the fault codes and perform a test drive to ensure the issue is resolved
How to erase DTC P24E8 on BMW
To erase DTC P24E8 on a BMW, the fault codes can be cleared using a diagnostic scanner. After the repair has been completed, the mechanic can reset the codes, and the Check Engine Light should turn off if the issue has been successfully resolved.
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.