Fault code P1352 – a step-by-step guide to diagnosing and fixing it

Error code P1352 is displayed and the check engine light is on - what does this mean?

The DTC P1352 is a manufacturer-specific fault code that is recognized by the OBD and EOBD systems and indicates a problem with the ignition coil or the ignition system. This trouble code mainly occurs in Ford vehicles and indicates a malfunction in the engine's ignition circuit.

What can cause this fault code?

• Defective ignition coil
• Damaged ignition cables or plug connections
• Faulty spark plugs
• Defective engine control unit (ECU)
• Corroded or loose ground connections
• Short circuit in the ignition coil circuit
• Interrupted wiring to the ignition system
• Defective crankshaft sensor

What symptoms occur in parallel with fault code P1352?

• Engine misfires: Irregular engine running and noticeable vibrations
• Loss of power: Reduced engine power, especially under load
• Starting problems: Difficult starting or longer starting times
• Increased fuel consumption: Poorer fuel efficiency
• Black smoke: Dark exhaust fumes from the exhaust pipe
• Check engine light: Permanently lit or flashing warning light

How to fix the problem of fault code P1352?

• Repairing fault code P1352 requires a systematic diagnosis of the ignition system.
• Replacement of the defective ignition coil after identifying the affected cylinder by resistance measurement and function test
• Complete inspection and replacement of all ignition cables and cleaning or replacement of the plug connections in the ignition circuit
• Replacement of the spark plugs with new, manufacturer-specific plugs with the correct heat value and electrode gap
• Repair or replacement of damaged wiring harnesses after a thorough continuity check of the entire ignition system wiring
• Cleaning and fixing all earth connections and checking the power supply to the ignition system
• Diagnosis and, if necessary, replacement of the engine control unit if internal defects are confirmed