Fault code P0352 – a step-by-step guide to diagnosing and fixing it

Error code P0352 is displayed and the check engine light is on - what does this mean?

The OBD/EOBD system has detected a fault in the ignition coil of the second cylinder. This DTC P0352 indicates a problem in the primary or secondary circuit of ignition coil B, which can lead to misfiring and engine problems.

What can cause this fault code?

• Defective ignition coil of the second cylinder
• Damaged ignition cables or spark plugs
• Loose or corroded plug connections
• Faulty wiring in the ignition circuit
• Defective engine control unit (ECU)
• Short circuit or interruption in the ignition coil circuit
• Dirty or oily ignition coil contacts

What symptoms occur in parallel with fault code P0352?

• Engine running unevenly: The engine runs unevenly and jerks, especially when idling
• Loss of power: Noticeable reduction in engine power when accelerating
• Misfiring: Misfiring in the second cylinder while driving
• Increased fuel consumption: The engine requires more fuel than usual
• Starting problems: Difficulty starting the engine, especially in cold weather
• Exhaust odor: Unburned fuel in the exhaust due to incomplete combustion

How to fix the problem of trouble code P0352?

• Repairing trouble code P0352 requires a systematic approach to identify the defective component.
• Replacement of the ignition coil of the second cylinder after checking for continuity and resistance values with a multimeter
• Replacing the spark plug of the affected cylinder and checking the correct electrode gap
• Repair or replace damaged ignition cables and check the entire wiring for insulation damage
• Cleaning and retightening of all plug connections in the ignition circuit and treatment of corroded contacts
• Diagnosis and, if necessary, replacement of the engine control unit if the error code occurs repeatedly
• Complete check of the ignition system including ignition distributor in older vehicles