P0672

Symptoms

• Difficulty starting a diesel engine at low temperatures
• The Check Engine light comes on
• White smoke from the exhaust pipe during cold start
• Unstable idle after starting in cold weather
• Glow plug indicator on the dashboard

Causes

• Burnt out glow plug cylinder 2
• Broken glow plug power wire
• Oxidation or damage to the spark plug connector
• GPCM module malfunction
• Damage to the wiring from the GPCM to the spark plug

How to Fix

1. Read error codes with OBD-II scanner
2. Measure the resistance of the glow plug of cylinder 2 (standard: 0.5–2 Ohm)
3. Inspect the wiring and spark plug connector for damage and oxidation.
4. Check the voltage at the spark plug terminal when the ignition is turned on.
5. Replace a faulty glow plug
6. Check the GPCM module if the error appears again

Related codes

Error P0672 by Vehicle Brand