2012 manual Passat TDI ~220,000km Flashing glow plug light (engine control malfunction) came during middle of a ninety minute highway ride, under load. There was a sudden "chirp" with a jerk in the drive train then loss of power (smooth running but no power or revs). Fairly sure the chirp wasn't tires, sounded more like from under hood and pretty sure not violent enough jerk of drivetrain to have come from the tires. Pulling over several km later, shut off for five minutes, restarted all seemed well for I think couple km, definitely got through the gears with power but then recurred. Shut off briefly, restarted, recurred immediately or almost immediately. Never got revs after that. Motor still runs smoothly in "limp mode".
I put the car on 4 jackstands (was actually en route to do that anyway, was driving to store it for the winter when this occurred!). Then bought a level 2 scanner which showed P0299 turbo/supercharger underboost.
After clearing the code, was not able to reproduce it while running (in neutral) on the jackstands. Engine runs smoothly but max rev is 2500 rpm.
Could this be hpfp or is it definitively turbo? Note the symptom when failed was an audible chirp but not any real squeal.
I should also say I've been running for a long time with a NOX sensor heating circuit code error which I assume is unrelated and that if my "ash bucket" is full that could not be related.
Thanks in advance for knowledgable comment only please.
I put the car on 4 jackstands (was actually en route to do that anyway, was driving to store it for the winter when this occurred!). Then bought a level 2 scanner which showed P0299 turbo/supercharger underboost.
After clearing the code, was not able to reproduce it while running (in neutral) on the jackstands. Engine runs smoothly but max rev is 2500 rpm.
Could this be hpfp or is it definitively turbo? Note the symptom when failed was an audible chirp but not any real squeal.
I should also say I've been running for a long time with a NOX sensor heating circuit code error which I assume is unrelated and that if my "ash bucket" is full that could not be related.
Thanks in advance for knowledgable comment only please.
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