MAF error code P0101

Old.Tony said:

It's possible. It's not a very common failure point at all - unfortunately it's an expensive item. Try getting one from a wrecker first, or even better still try borrowing one from someone on the understanding that you're giving it back to them once you're done testing.

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Fivefivezero said:

Hi Old.Tony, Yes they are pricey new. Looks like a third of the price from the wreckers.
When using the torque app, what do i need to look for with MAF, boost etc?

Q: driving this afternoon i experienced no issue.
Its been happening in the morning. Could it be a symptom of the car being cold i.e not warmed up enough before driving.

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Old.Tony said:

Torque has entries that directly query the MAFS - Mass Air Flow Rate (the one I use) and two others "Mass air flow sensor A" and "Mass air flow sensor B".

For boost, you could try "Intake Manifold Pressure" or the specifically designed "Turbo Boost & Vacuum Gauge".

I've described all of them exactly as they appear in the app so you can find 'em easier, because the app sorts them alphabetically.

Cold vs hot: the MAFS doesn't heat up appreciably, it's sitting in the air intake and when you're idling sure, the air temp in there will rise somewhat (particularly if you don't have a snorkel) but once you start moving (and especially if you have a snorkel) the temp will start to drop to ambient, so I doubt it's the problem.

Usually variances like that are caused by fuel system issues. Commonly leaks - easily spotted by trying to prime the fuel system but that's not so easy on the STX550. You can't spot the leaks unless the fuel system is overpressurised because the fuel delivery works on a low-pressure feed to the pump.

Something to try: check over the fuel system, and in particular the filter. Check that the water sensor (I'm assuming it has one in the filter, like the YD25s) is firmly seated, and check the hoses for any signs of cracking. Make sure the clamps are on tight enough to hold the hose firmly but not so tight it's pinching the hose.

I really wish they'd added a primer to the 550. It'd make life a lot easier. Fuel leaks (which are actually air leaks, where air is drawn into the fuel system and fuel is allowed to flow back to the tank) are easy to spot - just overprime it.

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Fivefivezero said:

Thanks. Just one more thing
Could a leaking intercooler be part of the issue?

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Fivefivezero said:

Torque app error code P0101- Technical Description Mass Air Flow (MAF) Circuit Range/Performance.


Also had a P2b00 error, but couldnt find anywhere what this means.

I gave the MAF a good clean. Cleared the error code and checked for faults again and came up clear.

Drove well after this for 10-15kms.

Got the limp mode again this morning, shows no logged faults, but same errors appeared under 'pending' faults.

Does this mean the MAF needs replacing?

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Nig said:

After you cleaned the MAF you should do a pump reset.

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