Member Since: 03 Sep 2018
Location: Staffordshire
Posts: 567
Probably MAF?
Ah the joys...
Finished a 12 hour night shift this morning at 7am. Started the motor and "restricted performance" popped up. Just what you want when you're tired and just want to go home.
Plugged the GapIID tool in and read the faults. Pictures of faults attached. There's a big list!
It drove to work absolutely fine and is parked under cover. Never had any issue like this before or any tell tale signs.
Am I right, thinking to try cleaning the maf first?
And if so, anyone got a link to an idiots guide?
Cheers in advance as always.
13th Mar 2023 8:03 pm
M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8072
A poorly battery can throw up all sorts of faults, after the engine has got warmed up (3-4 minutes running) switch off and restart, cranking a cold engine can pull the battery threshold voltage below necessary requirements and throw faults up, it’s a little bit like the flow of blood to our hands and feet being restricted when the body gets cold.
First thing to do is delete faults and then read them again when you get to work tonight and post what you find.
The voltage shown shows the alternator is charging at max for an AGM battery. It can when others can't,
It will when others won't,
It goes where others don't.
13th Mar 2023 8:12 pm
jamez79
Member Since: 03 Sep 2018
Location: Staffordshire
Posts: 567
Hi, I tried turning it off and back on again. I had fired up the remote fbh 10 mins before leaving. I cleared the faults and read them again and the same list came back.
The battery is reasonably new (12 months or so). I'll pop it on charge tonight just in case and try reading the codes again once cleared after charging.
Cheers
13th Mar 2023 8:41 pm
jamez79
Member Since: 03 Sep 2018
Location: Staffordshire
Posts: 567
Been on charge all day and battery is full. Took the maf sensor off and cleaned. Put back and cleared faults and started the motor. Still showing restricted performance and engine warning light.
Read the faults again and just this one comes up (screenshot below).
Is there a way to test the maf sensor?
Live data showed a reading of 20.7g/s at idle - whatever that means and it rises when the engine is revved.
I'm at a bit of a loss as to what the fault is.
Any help greatly appreciated.
Jim
14th Mar 2023 4:57 pm
jamez79
Member Since: 03 Sep 2018
Location: Staffordshire
Posts: 567
For the benefit of anyone else searching for this fault in the future:
The below video shows the fault and the most probable cause.
&t=583s
I have swapped mine over and the fault changes to the other side so I'm quietly confident this is at fault. Cleaning didn't fix it either.
I've ordered a new one and will confirm it's fixed once installed.
Part number PHF500090
Jim
15th Mar 2023 3:25 pm
jamez79
Member Since: 03 Sep 2018
Location: Staffordshire
Posts: 567
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