Audi Q7 ECU/Throttle fault and engine seals
Discussion
My Audi Q7 3.0TDi showed a engine fault (flashing glow plug icon) and Stability Program warning message on dash display. VAGCOM diagnosis at secondary service garage showed Throttle Position Sensor Circuit (TPSC) fault traced to pedal sensor and DPF needs regenerating (no DPF warning on dash display). Wouldn't allow regen without pedal replacement.
Pedal and sensor replaced and ran without problem for a few weeks then engine fault and Stab Prog warning again.
Took it to Audi main dealer for diagnostic. TPSC fault plus ABS and Suspension, plus rear offside passenger door lock and offside AC fault listed all with similar Unlearning Counter/Drive Cycle numbers (215-255) - (does this mean they all stared at the same time???) Do they all share a similar wiring loom/connector?
Drove car away to follow-up with first garage but broke down within a mile or so - no throttle response - would creep along on tickover.
Recovered to Audi - who checked out the TSPC and now say it is the ECU that needs replacing.
However, main cost is oil leaks from rear casing and sump and at least one injector seal - requiring engine out and full reseal.
Are the seal failures due to back pressure from a blocked DPF/oil pump/whatever???
2011, 90k miles, owned by me 4 years bought from Audi main dealer as approved used car - obviously out of warranty now.
Any guidance before commissioning work would be appreciated!!!
Pedal and sensor replaced and ran without problem for a few weeks then engine fault and Stab Prog warning again.
Took it to Audi main dealer for diagnostic. TPSC fault plus ABS and Suspension, plus rear offside passenger door lock and offside AC fault listed all with similar Unlearning Counter/Drive Cycle numbers (215-255) - (does this mean they all stared at the same time???) Do they all share a similar wiring loom/connector?
Drove car away to follow-up with first garage but broke down within a mile or so - no throttle response - would creep along on tickover.
Recovered to Audi - who checked out the TSPC and now say it is the ECU that needs replacing.
However, main cost is oil leaks from rear casing and sump and at least one injector seal - requiring engine out and full reseal.
Are the seal failures due to back pressure from a blocked DPF/oil pump/whatever???
2011, 90k miles, owned by me 4 years bought from Audi main dealer as approved used car - obviously out of warranty now.
Any guidance before commissioning work would be appreciated!!!
Edited by colinbryant on Tuesday 10th April 17:04
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