BMW DTC P02A6 – Cylinder 4 – Fuel Trim at Max Limit
DTC P02A6 meaning on BMW
The DTC P02A6 code on a BMW indicates that there is an issue with Cylinder 4’s fuel trim being at the maximum limit. This means that the engine control module (ECM) has detected that the fuel mixture in Cylinder 4 is either too rich or too lean, and it has reached the limit of adjustment to correct it.
BMW DTC P02A6 symptoms
Symptoms of the DTC P02A6 code on a BMW may include:
- Check Engine Light (CEL) illuminated
- Decreased fuel efficiency
- Engine running rough or misfiring
- Lack of power or acceleration
BMW DTC P02A6 causes
Common causes of the DTC P02A6 code on a BMW include:
- Faulty fuel injector in Cylinder 4
- Vacuum leak in the intake system
- Issues with the fuel pressure regulator
- Faulty oxygen sensor
BMW DTC P02A6 seriousness
Ignoring the DTC P02A6 code on a BMW can lead to potential engine damage and decreased performance. It is important to address this issue promptly to prevent further complications.
How to diagnose DTC P02A6 on BMW
To diagnose the DTC P02A6 code on a BMW, you can perform the following steps:
- Use an OBD-II scanner to retrieve the fault codes
- Inspect Cylinder 4’s fuel injector for proper operation
- Check for any vacuum leaks in the intake system
- Test the fuel pressure regulator
- Inspect the oxygen sensor for any faults
How to fix DTC P02A6 on BMW
To fix the DTC P02A6 code on a BMW, you can try the following solutions:
- Replace the faulty fuel injector in Cylinder 4
- Repair any vacuum leaks in the intake system
- Replace the fuel pressure regulator if necessary
- Replace the faulty oxygen sensor
- Clear the fault codes and reset the ECM
How to erase DTC P02A6 on BMW
To erase the DTC P02A6 code on a BMW, you can use an OBD-II scanner to clear the fault codes stored in the ECM. Once the codes are cleared, the Check Engine Light should turn off. It is important to address the underlying issue causing the fault code before clearing it 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
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.