richi
Member
Hello gang. Here's the saga of my "stalling" PHEV. Posting here in the hope that someone has a smart suggestion. Here's the briefest summary I can muster:
From a stone-cold start, when the ECU first calls for the engine to turn, it runs for 25 seconds then stops, displaying EV System Service Required. A DTC is stored: P10DC, which appears to be generic.
Video: https://www.youtube.com/watch?v=P9Qaw3Qk1D8
After switching off then on again, engine operation is OK for the rest of the day. Even after being parked for several hours it's OK. The problem only re-occurs the next morning.
Problem began when the weather turned cold, on October 23. Vehicle is outdoors, not garaged.
Much head-scratching at Brighton Mitsubishi last week. Huge thanks to David Evans and Kevin. They retrieved three other DTCs: B1115, C1776 and C1753. The first makes no sense, because there's no issue with the cabin heating. It appears the other two are thrown because the ACC/FCM system sees the P10DC code.
Brighton Mitsubishi consulted MMCUK on Friday and was told it could be a fuel-contamination issue. But we don't think this theory fits the behaviour: engine is fine while driving in series and parallel modes (Brighton also did an extensive test drive).
Because I can't demonstrate the problem until after an overnight cold-soak, we didn't get any further, but we've eliminated the main engine relay (they substituted a known-good spare).
Because the problem began when weather was cold and damp, it seems like an ignition issue, so I investigated the coils. I've sprayed GT85 as a damp repellent over the area, but with no luck.
Otherwise, because it always stops 25 seconds into the initial fast-idle, it seems like the ECU is objecting to something a sensor is telling it. But I'd love to know why there's no DTC to say which sensor!
From a stone-cold start, when the ECU first calls for the engine to turn, it runs for 25 seconds then stops, displaying EV System Service Required. A DTC is stored: P10DC, which appears to be generic.
Video: https://www.youtube.com/watch?v=P9Qaw3Qk1D8
After switching off then on again, engine operation is OK for the rest of the day. Even after being parked for several hours it's OK. The problem only re-occurs the next morning.
Problem began when the weather turned cold, on October 23. Vehicle is outdoors, not garaged.
Much head-scratching at Brighton Mitsubishi last week. Huge thanks to David Evans and Kevin. They retrieved three other DTCs: B1115, C1776 and C1753. The first makes no sense, because there's no issue with the cabin heating. It appears the other two are thrown because the ACC/FCM system sees the P10DC code.
Brighton Mitsubishi consulted MMCUK on Friday and was told it could be a fuel-contamination issue. But we don't think this theory fits the behaviour: engine is fine while driving in series and parallel modes (Brighton also did an extensive test drive).
Because I can't demonstrate the problem until after an overnight cold-soak, we didn't get any further, but we've eliminated the main engine relay (they substituted a known-good spare).
Because the problem began when weather was cold and damp, it seems like an ignition issue, so I investigated the coils. I've sprayed GT85 as a damp repellent over the area, but with no luck.
Otherwise, because it always stops 25 seconds into the initial fast-idle, it seems like the ECU is objecting to something a sensor is telling it. But I'd love to know why there's no DTC to say which sensor!
