Vdash with Scanmatk3
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This is the latest run after clearing the P0100 and the adaptions on Throttle and EGR:
the exact fault sequence with raw hex:
17:56:48 — EGR still working (54.5%, raw 8B), MAP at 255 (FF), speed 53 mph
17:56:54 — EGR drops to 2.35% (raw 06), EGR Error -3.91% (raw 7B), MAP drops to 110
17:56:59 — EGR goes to 0.0% (raw 00) — this is the kill moment. RPM 2700, MAP 221, MAF 109.6 g/s, pedal 49%
17:57:05 — EGR stays 0.0%, Engine Load drops to 0.0% (raw 00) — tortoise mode active, speed 49 mph but decelerating, pedal
releasedThe exact trigger sequence at raw level:
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The problem seems to start when to the EGR is closing. As your MAF is reporting different values, this part is working and not the cause of your problem. Your data is lacking the pressure from the MAP sensor(s). There is one in the intake manifold that you should a look at as described here https://d5t5.com/article/vea-d5-clogged-boost-pressure-sensor and there is maybe a second one in the intercooler, that you should also clean. Then you should do a smoke test of whole intake and charge pipe system. There seems to be leak, or it's just the MAPs are dirty, also take a closer look at the EGR pipes. These are known to crack from time to time.
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It's also possible that your EGR isn't working properly or stuck open when the ECM demands it to be fully closed.
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Thanks, We just replaced the EGR Valve and Cooler, cleaned all pipes, it has been smoke tested and the MAP sensor is a new Bosch Sensor in the intake manifold. I will give that a clean and perhaps get a Volvo one.
Smoke test was done the only leak and very slight was oil filler cap, I can replace that also, I have replace the rubber seal, but while better tiny bit of air passing by it.
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@Ctrl-alt-delete what's the mileage of the car? Maybe the PCV is leaking or clogged.
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140K that was done also its inside the plastic Valve / injector cover that was also replaced, this was done with all other work. I also checked receipts for parts the oil filler cap was replaced.
I am going to have to book into Volvo, it pains me to do so but I don't think I have another option.
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@T5-T6-Schnappi do you have a diagram of the thin pipe that can get blocked , back of engine, Volvo tells me to check that and if blocked replace that and Banjo. They said common MAF fault is EMAP pressure related.
Do you know if can be removed and cleaned using same banjo or do I need to replace?
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@Ctrl-alt-delete https://volvoparts.barrybourke.com.au/a/Volvo_2018_XC60-20l-4-cylinder-Turbo-Diesel/_51507_12286919/Compressor-exhaust/GR-466266.html
Should be nr. 33-37 in the diagram. There are several videos on youtube. Just search XC60 EMAP pipe. -
@T5-T6-Schnappi I had the pipe replaced today, so far no more limp mode, thank you!
