leopold72

Not kosher

Yes I've watched it ...good bit of information!

Any links that work ?

Fyi....i decided that finding a fault like this is like finding a needle in a hay stack without a wiring diagram and pinout to the specifics of circuit 'A'...so this morning decided to take it to a mechanic, started the car and no flashing glow plug light ! But the cel light was on, drove really well, got it up to temp and drove it home, cleared the code which was the p0642 and the light went out....so far so good, thanks for all the input and suggestions 👍

Not a single link works

Where or what's your DM details 🤔

Need a pin out for BCM and ECU for my mk2 pd 170 ...to try and resolve my p0642 fault...can't seem to find one

With the battery at 12.9v and ignition on cleared the faults but p0642 still remained low voltage surely the sensors would be receiving enough power, each time I ran a scan the voltage seems to fluctuate I've noticed 4.8-3,6v (sensor voltage?) and 12.6-11.4( battery voltage ?)

I put the battery on charge and it went up to 12.9 volts....with the ignition on i connected vcds cleared the fault but it remained...took it for a spin to recalibrate steering,traction and tyre pressure but within 200 meters it cut out, but restarted started OK another 400m and cut out but restarted this time with the p3138 returning....cleared the faults again and just the p0642 was back

Thanks for trying, much appreciated, it's an odd one....most sensors I thought had a working range of + or - 0.2V and would still work at 4.8v...anyway on with the investigation!

Engine no. BMN750071 cheers mate!

Tested the battery... read 12.2v....ignition on 11.8....cranking flashed down to 9.? Engine running 14v

Fyi the first time the problem occurred was whilst driving, the engine cut out but restarted and drove as normal, no flashing glow plug light, I decided I needed to scan it so took the risk of driving 70 miles to pick up a vcds, which it seemed to do fine, then set off on my return journey and after quater of a mile the engine cut out again, it restarted and continued this time with a flashing glow plug symbol, after another 20 miles it cut out again, pulled over and restarted it and made it home, plugged in the vcds and got the p0642 code and haven't driven it since due to fear of breaking down....

I will check tomorrow and let you know !

No i have not, but the battery reads 12 volts and 14 with the engine running