Renault 1.9dci P0670 Glow Plug Control Circuit/Open Fault - Fix and Cost
Hi, I'm experiencing issues with my Renault 1.9dci diesel engine. The 'Injection Fault' and 'Red Stop' warning lights are frequently coming on, causing the vehicle to enter limp mode. My friend used an EOBD reader and found fault code P0670: Glow Plug Control Circuit/Open. I'd like to know how to fix this issue and what the approximate repair cost would be. The car is a 1.9dci diesel model, and I'm concerned about cold weather starting performance as well.
It's important to note that an EOBD reader alone may not diagnose the root cause of your issue. The glow plug control module likely needs replacement. However, a faulty module can make cold starts difficult—especially in temperatures below freezing—and may fail to trigger the red warning light properly. To get an accurate diagnosis, please provide more details: the vehicle's year, exact warning lights displayed, driving behavior (e.g., loss of power, misfiring), and whether you've had a professional OBD2 diagnostic performed on your Renault 1.9dci.