Fault code P1316 – a step-by-step guide to diagnosing and fixing it

Error code P1316 is displayed and the check engine light is on - what does this mean?

The DTC P1316 is a manufacturer-specific fault code that is recognized by the OBD and EOBD systems and indicates a problem with the ignition coil monitoring or the ignition system. This trouble code mainly occurs in Ford vehicles and indicates a fault in the ignition coil diagnostics or in the primary circuit of the ignition system.

What causes can this fault code have?

• Defective ignition coil
• Damaged ignition coil cable or plug connection
• Faulty spark plugs
• Defective engine control unit (PCM/ECM)
• Short circuit in the ignition coil primary circuit
• Interrupted wiring to the ignition system
• Defective crankshaft sensor
• Problems with the voltage supply to the ignition coils

What symptoms occur in parallel with fault code P1316?

• Engine running unevenly: The engine runs unevenly or jerks when idling
• Misfiring: Noticeable misfiring while driving, especially under load
• Loss of power: Reduced engine power and poor acceleration
• Increased fuel consumption: The engine requires more fuel than normal
• Starting problems: Difficult starting or longer starting times
• Exhaust problems: Black or white smoke from the exhaust

How to fix the problem of fault code P1316?

• Repairing fault code P1316 requires a systematic diagnosis of the ignition system.
• Check ignition coils individually and replace defective coils - costs: €50-150 per coil
• Check all spark plugs and replace if worn or damaged - costs: €30-80 for a set
• Check the wiring and plug connections of the ignition coils for damage and repair them
• Check engine control unit (PCM) for functionality and replace if defective - costs: €500-1500
• Test crankshaft sensor and replace if necessary - costs: €80-200
• Measure ignition system voltage supply and rectify electrical problems
• Reset OBD system and carry out test drive to confirm repair