BMW DTC P138A – Ion Ignition Coil Cylinder 6
DTC P138A meaning on BMW
DTC P138A for BMW refers to an issue with the Ion Ignition Coil Cylinder 6. This diagnostic trouble code indicates a problem with the ignition coil specifically for cylinder 6 in the engine.
BMW DTC P138A symptoms
Symptoms of BMW DTC P138A may include:
- Engine misfires
- Loss of power
- Rough idling
- Check Engine Light illuminated
BMW DTC P138A causes
Common causes of BMW DTC P138A include:
- Defective ignition coil
- Wiring issues
- Spark plug problems
- ECU (Engine Control Unit) malfunction
BMW DTC P138A seriousness
Ignoring BMW DTC P138A can lead to further engine damage, reduced fuel efficiency, and potential catalytic converter issues. It is important to address this code promptly to prevent more severe problems.
How to diagnose DTC P138A on BMW
To diagnose BMW DTC P138A, you can:
- Use a diagnostic scanner to read the code
- Inspect the ignition coil for cylinder 6
- Check the wiring and connections related to the ignition coil
- Perform a compression test on cylinder 6
How to fix DTC P138A on BMW
To fix BMW DTC P138A, you can:
- Replace the faulty ignition coil for cylinder 6
- Repair any damaged wiring or connections
- Replace spark plugs if necessary
- Reset the ECU after repairs
How to erase DTC P138A on BMW
To erase BMW DTC P138A, you can:
- Use a diagnostic scanner to clear the code
- Ensure the underlying issue has been resolved before clearing the code
- Drive the vehicle to allow the ECU to relearn parameters
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.