Error P066F on Great Wall все модели

Symptoms

• Difficulty starting a diesel engine in cold weather
• The Check Engine light comes on
• Extended warm-up time before starting
• White smoke from exhaust pipe on cold start
• Unstable engine operation at idle

Causes

• Short circuit of the glow plug control wire of cylinder 3 to power
• Open ground circuit in control circuit
• Glow Plug Control Module (GPCM) Malfunction
• Damage to control circuit wiring or connectors
• Internal ECU fault

How to Fix

1. Read error codes with an OBD-II scanner, capture a freeze frame of the data
2. Inspect the wiring and connectors of the cylinder 3 glow plug and GPCM
3. Measure the voltage in the spark plug control circuit of cylinder 3
4. Check the ground circuit for open circuit with a multimeter
5. Check signal wire for short circuit to power
6. If the wiring is working properly, diagnose and replace the GPCM or ECU

FAQ

Error P066F on other vehicles