VOLVO
ECM-6661 - Glow relay control. Faulty signal
System
Engine Control Module (ECM)
Volvo models this fault code applies to
This fault code has different meanings depending on model, model year or engine. Select the meaning that applies to your car.
Applies to the following models:
4 modelsC30 (2007–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
Show models by year and engine (10)
- Volvo C30 (2007–2013)2007Engine D5244T8, D5244T9 only
- Volvo C30 (2007–2013)2008–2010Engine D5244T13, D5244T8, D5244T9 only
- Volvo C70 (2006–2013)2007Engine D5244T8, D5244T9 only
- Volvo C70 (2006–2013)2008–2010Engine D5244T13, D5244T8, D5244T9 only
- Volvo S40 (2004–2013)2006Engine D5244T8 only
- Volvo S40 (2004–2013)2007Engine D5244T8, D5244T9 only
- Volvo S40 (2004–2013)2008–2010Engine D5244T13, D5244T8, D5244T9 only
- Volvo V50 (2004–2013)2006Engine D5244T8 only
- Volvo V50 (2004–2013)2007Engine D5244T8, D5244T9 only
- Volvo V50 (2004–2013)2008–2010Engine D5244T13, D5244T8, D5244T9 only
What does this fault code mean?
The engine control module drives glow plug 1 and stores the fault code when it finds a fault in that particular glow plug. The fault may be caused by poor contact in the connectors, an open circuit in the signal wire or a damaged glow plug relay.
Possible causes
- Contact resistance or oxidation in the connectors
- Open circuit in the signal wire
- Damaged glow plug relay
What you can do
- 1Check that the connections and wiring are secure, with no play, contact resistance or oxidation
- 2Use a multimeter to check that the wire between the glow plug relay and glow plug 1 has no open circuit
- 3Have a workshop measure the resistance of each glow plug
- 4Replace the glow plug relay or the glow plug if damaged, then clear the fault code
Symptoms you may notice2
- A message appears in the text display
- The engine is hard to start when cold
General guidance for car owners. Diagnosis on the car can point to a different cause.