P2142 – BMW DTC

BMW DTC P2142 – EGR Throttle Control Circuit ‘A’ High

DTC P2142 meaning on BMW

The Diagnostic Trouble Code (DTC) P2142 for BMW refers to an issue with the EGR (Exhaust Gas Recirculation) Throttle Control Circuit ‘A’ being detected as high. This means that the signal voltage in the EGR throttle control circuit ‘A’ is registering higher than the specified range, indicating a potential problem with the EGR system’s operation.

BMW DTC P2142 symptoms

Symptoms associated with DTC P2142 on a BMW may include:

• Check Engine Light (MIL) illuminated on the dashboard
• Reduced engine performance or power
• Increased fuel consumption
• Engine stalling or rough idling

BMW DTC P2142 causes

Common causes of DTC P2142 on a BMW can include:

• Faulty EGR throttle control sensor
• Wiring or connector issues in the EGR throttle control circuit
• Carbon buildup in the EGR system
• Software or calibration issues

BMW DTC P2142 seriousness

While DTC P2142 may not always result in immediate drivability issues, it is important to address this problem promptly to prevent potential damage to the engine or emissions system. Ignoring this fault could lead to more severe issues over time.

How to diagnose DTC P2142 on BMW

To diagnose DTC P2142 on a BMW, a mechanic would typically perform the following steps:

1. Use a diagnostic scanner to retrieve the fault code and freeze frame data
2. Inspect the EGR throttle control sensor and related wiring for any visible damage or corrosion
3. Check the EGR system for carbon buildup or blockages
4. Perform a voltage test on the EGR throttle control circuit to verify the high signal voltage

How to fix DTC P2142 on BMW

To fix DTC P2142 on a BMW, the following steps may be taken:

1. Replace the faulty EGR throttle control sensor if necessary
2. Repair any damaged wiring or connectors in the EGR throttle control circuit
3. Clean the EGR system to remove any carbon buildup or blockages
4. Update the software or perform calibration adjustments as needed

How to erase DTC P2142 on BMW

After addressing the underlying issue causing DTC P2142 on a BMW, the fault code can be erased using a diagnostic scanner. This will clear the code from the vehicle’s memory and turn off the Check Engine Light. It is important to ensure that the repair has been successful before clearing the code to prevent it from reoccurring.

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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