Hello,
I have a flashing glow plug question - Audi A4 2015 Reg.
The problem initially started on a very cold morning. I was late for work so put the key in and drove off immediately. The flashing glow plug light came on and the car went into limp mode as I tried to accelerate. I stopped a few minutes later, re started the engine and the glow plug light didn't illuminate again.
I've had this problem a while now though. Every time I start the engine, and drive off, after a few minutes the glow plug light will begin to flash. I then stop the car after a few more minutes of driving, switch the engine off, and back on again and the glow plug light does not start flashing again once I start driving.
If I allow the car to idle for 10 minutes after initial start, so that the temperature has started to rise, the glow plug light does not flash when I start driving.
If I switch the engine off and park up for up to 4 hours or so, on re start (after a few minutes of driving) I do not get the glow plug light flashing. If I park up for 8 hours or more, I have the glow plug flashing light issue again.
I took it to the garage but the mechanic was stumped. Codes checked - I don't have the actual codes but he said he cleared "oil pressure" and "pressure sensor cylinder 3 (circuit malfunction". He also checked the glow plugs themselves which were working fine.
The glow plug lights up when you put the key in and extinguishes as expected. When the car is started, the glow plug light does not flash or illuminate. It only ever flashes after a few minutes of driving.
Any ideas?