Look up BMW diagnostic trouble codes (DTC) and get detailed explanations. This tool helps you understand what your BMW's computer is telling you.
Enter your BMW's diagnostic code below to get detailed information and possible solutions.
Here are some frequently encountered diagnostic codes in BMW vehicles.
Bank 1
The engine is running too lean on Bank 1. Common causes include vacuum leaks, faulty MAF sensor, or fuel delivery issues.
Severity: Moderate
Bank 2
Similar to P0171 but affects Bank 2. Often occurs alongside P0171 in V6/V8 engines. Check for intake leaks and fuel system issues.
Severity: Moderate
Multiple Cylinders
Random misfires detected across multiple cylinders. Can be caused by ignition coils, spark plugs, or fuel delivery problems.
Severity: High
Bank 1
Catalytic converter efficiency below threshold. May indicate failing catalytic converter or oxygen sensor issues.
Severity: Moderate
BMW Specific
VANOS (Variable Valve Timing) system malfunction. Common in BMW engines, often requires VANOS solenoid or actuator replacement.
Severity: High
Off Idle Bank 1
System running lean off idle conditions. Often related to carbon buildup in intake valves or fuel injection issues.
Severity: Moderate
Learn what different code types mean and when you should seek professional help.
Engine, transmission, and emissions-related codes. These affect your BMW's drivability and emissions compliance. Range: P0000-P3999.
Body control systems including lighting, climate control, security, and comfort features. Range: B0000-B3999.
Communication network codes for CAN bus, wiring, and module communication issues. Range: U0000-U3999.
Chassis systems including ABS, stability control, steering, and suspension. Range: C0000-C3999.
While this tool provides helpful information, professional diagnosis is often necessary for proper repair.
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