Vdash with Scanmatk3
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@T5-T6-Schnappi thanks, here is the history leading to this, In October at around 135K I had the haldex service, oil change and gearbox oil changed, the car had a squeak that I thought was a belt squeaking. I took it in had timing and belts done. The squeak remained. The guy at the time said he could blank the EGR and have the ECU map it out. I had a LR Disco 2 and this same procedure was done there so I agreed. Car ran OK for a short spell then codes started appearing of which the same tech managed to remove but the performance was not correct.
I had them remove the blank and at the same time I had the squeak sorted, this turned out to be Manifold Gasket and loose bolts. At the same time all oil seals were replaced at back of engine. Car ran well for a short time and then same performance issues, so I had the stock Map put back on ECU from the back up.
Since then the turtle. I took to a different garage and they put a scope into the Inlet and carbon was bad, so we replaced the EGR Valve and Cooler and did a Walnut Blast. Still the tortoise and P0100.
I tried a MAF from Ebay, same issue, It then got a new MAF from Volvo same issue and the logging I am doing says the EBAY MAF and the New MAF are very much the same.
The Scanner used was Autel and this only registers the P0100 fault, I will check with the garage again to see if any thing else appears.
The only aftermarket sensor is the MAP, thats a Bosch one, I replaced because original was coked up, but no fault reading for that one.
I am capturing the RAW HEX, I will run capture after clearing all adaptions and see what I can get as the fault appears.
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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.
