1.6tDi, Inlet press sensor low volts, ESP and Start/Stop fault

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Fluffykins
Posts: 3
Joined: Sun Apr 21, 2013 8:11 am
Passat model: B7

1.6tDi, Inlet press sensor low volts, ESP and Start/Stop fault

Post by Fluffykins » Fri Jan 26, 2018 11:44 am

Odd intermittent problem with a Passat B7 1.6Tdi Bluemotion 2012.

Symptoms:
Traveling at a steady ~50 on a clear road.
Glowplug indicator started flashing and car went into limp mode.
Got to where we were going and restarted a few hours later: Car seemed fine.
Booked it in to be looked at. (Independent VW specialist)
He did an ODB scan and advised he saw “Low manifold pressure” (from memory) which suggested air leak in the intake system
He checked hoses, ducts and pipework and found no problem. Cleared the fault and a test drive didn’t throw it up again.

A few days later:
Waiting in queue at gas station. Space came clear and I rolled forward the last yard with clutch down, no brake needed and just canme to a stop at the pump.
Glowplug indicator started flashing, message on console display “ESP fault”, followed by “Start Stop fault” (From memory)
Fault cleared on restart.

A few days later:
Going round roundabout gently (full 180 degree turn at small roundabout)
Glowplug indicator started flashing, message on console display “ESP fault”, followed by “Start Stop fault” (From memory)and car went into limp mode
Fault cleared on restart
Booked it in to be looked at again.
Had “Low voltage on boost sensor” (from memory)
Changed sensor, test drive without incident.

Going home later that day
Just driving along <20mph, Glowplug indicator started flashing, message on console display “ESP fault”, followed by “Start Stop fault” (From memory)and car went into limp mode
Back to garage and code scan still gave “Low voltage on boost sensor” (from memory)
Diagnostics advice for “ESP fault” and “Start Stop fault” suggest checking the engine management computer (which could implicate whatever caused the boost sensor fault)

We now wonder whether there is damaged wiring somewhere between the EMC and the boost sensor. The guy proposes to run new wiring and isolate old cables.

Anyone have any ideas?

Many thanks

mrderv
B1
Posts: 149
Joined: Tue Apr 18, 2017 1:35 pm
Passat model: B7
Location: Durham

Re: 1.6tDi, Inlet press sensor low volts, ESP and Start/Stop fault

Post by mrderv » Fri Jan 26, 2018 11:52 am

ESP fault indicates there is a problem with the ESP/ABS, and therefore why it would accompany a StopStart fault warning (as it uses the ABS speed signal to determine when to turn off the engine).

Your garage needs VCDS or similar to look into the other modules of the car, Not just the engine ECU.

My mate had this issue with his 2011 A4, same symptoms. His turned out to be a fault with the Electronic Handbrake, which once replaced, was all back to normal.
2013 VW Passat Sport 2.0 TDI Stage 2 192-bhp 415-Nm

Fluffykins
Posts: 3
Joined: Sun Apr 21, 2013 8:11 am
Passat model: B7

Re: 1.6tDi, Inlet press sensor low volts, ESP and Start/Stop fault

Post by Fluffykins » Mon Jan 29, 2018 9:47 am

Hi

The man says VCDS reports code p0237

32110
B1
Posts: 102
Joined: Tue Jan 08, 2013 12:19 pm
Passat model: b7

Re: 1.6tDi, Inlet press sensor low volts, ESP and Start/Stop fault

Post by 32110 » Mon Jan 29, 2018 2:27 pm


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