Multiple fault codes

[phil 9289]

Having an issue with my car ATM where it idles rough and then cuts out, or goes into limp mode on boost before cutting out.

Scanned it last night and got all the fallowing codes:

P1289, turbo bypass valve short to ground
P1421, sai valve short to ground
P1435, sai pump short to ground
P1117, ho2s sensor bank 1 sensor 2 short to ground
P1114, ho2s sensor bank 1 sensor 2 resistance too high
P1425, tank ventilation short to ground
P1225, injector 1 short to ground
P1226, injector 2 short to ground
P1227, injector 3 short to ground
P1228, injector 4 short to ground
P0102, maf low input.


Only things to change on car recently are n249 bypass and fpr swapped.

Any help welcome as I'm lost
Cheers
Phil

 

[ntcupra]

Had this problem before and turned out to be a fuse, maybe different in your case but worth checking them over.......

 

[phil 9289]

Checked all my fuses and they seem fine. Got a replacement maf to try later today. If that isn't the issue I'm stumped at what else it could be.

 

[Tucker157]

Could be a bad earthing point, or possibly the 249 bypass has done something, how was it carried out?


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[phil 9289]

What other earth points other than behind battery and beside coilpacks? Carried out bypass following martyns guide in faq section.

 

[Ziggydan]

There's normally an earth on the gearbox i think, usually attached to one of the bolts that secure it to the block. I think theres also normally a sizeable earth to the back of the internal fusebox. It might be worth lifting the scuttle panel off and having a look around the ecu, there is a drain leading into the wing that can sometimes get blocked and cause water to pool around the ecu.


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[phil 9289]

Only one i didn't get was gearbox but got four others. Main one behind battery, beside the coilpacks and two under the scuttle panel.

Cleaned them all up and swapped over maf and all cleared. Not sure which was the cure but problems solved.