'03 1.8T Quattro.... I have a feeling something is wrong.

I was getting this code last week,

1 Fault Found:
16487 - Mass Air Flow Sensor (G70): Signal too High
P0103 - 001 - Upper Limit Exceeded - Intermittent - MIL ON
Readiness: 0000 1001

cleared it to see if it would come back, and no problems until early this-morning when all hell broke loose. Any ideas?


Address 01: Engine
Part No SW: 8E0 909 518 AF HW: 8E0 909 018 A
Component: 1.8L R4/5VT G 0001
Coding: 0016701
Shop #: WSC 12592

6 Faults Found:
18062 - Please check DTC Memory of Instrument Cluster
P1654 - 004 - No Signal/Communication - Intermittent
16486 - Mass Air Flow Sensor (G70): Signal too Low
P0102 - 002 - Lower Limit Exceeded - MIL ON
16683 - Boost Pressure Regulation: Control Range Not Reached
P0299 - 002 - Lower Limit Exceeded - Intermittent
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 001 - Upper Limit Exceeded - MIL ON
16688 - Cylinder 4: Misfire Detected
P0304 - 001 - Upper Limit Exceeded - MIL ON
16687 - Cylinder 3: Misfire Detected
P0303 - 001 - Upper Limit Exceeded
Readiness: 0000 0000

Address 03: ABS Brakes
Part No: 8E0 614 517 H
Component: ABS/ESP allrad 2328
Coding: 04275
Shop #: WSC 06435

1 Fault Found:
18265 - Load Signal: Error Message from ECU
P1857 - 35-00 - -

Address 17: Instruments
Part No: 8E0 920 900 L
Component: KOMBI+WEGFAHRS. RB4 D35
Coding: 03300
Shop #: WSC 94826
WAULC68EX3A152676 AUZ6Z0B0221473

1 Fault Found:
01039 - Coolant Temperature Sensor (G2)
30-10 - Open or Short to Plus - Intermittent

 

damn

 

I think if the maf signal is too high that would cause you to run rich which could cause all the other codes.

 

Would cleaning the maf sort this problem out or am I looking at a bigger project?

 

It may help, but only for a while. Cleaning is normaly a temporary fix.

 

I've heard to some ppl unplugging the maf to isolate the problem, is this a wise move? Will my car run okay with it unplugged?

 

If you have 75K mi with the origonal MAF replace it.
www.ecstuning.com



https://www.audiforums.com/m_99381/tm.htm

 

If you unplug it youll run rich, so if you unplug it and you notice no change, its probably the maf. But a dying maf can have off and on performance so thats not necessarily the best troubleshooting method unless yours is completely dead.

 

Would a boost leak somewhere cause these problems.... Shortly after I got chipped I noticed the car wasn't idle'n as smooth as it used to. I'm about to try unplugging the maf, (will post results) but would a leak test be prudent?

 

Quick update: With the maf plugged in my CEL blinks, with the maf unplugged it stays solid. (perhaps nothing, but thought I'd mention it) and when my key is in the ingition turned almost all the way I hear some clicking noises followed by a strange almost grinding sound. I'm thinking I should just have it towed to the dealer. :-(