Intermittent CEL - 2002 A6q V6

[John Larson]

On 8/19/2013 7:24 AM, Tony Hoffman wrote:
> Time for a new MAF, IME. The hard downshift is the dead giveaway, as MAF
> info goes to the TCU as well.
>
> Tony
>
> On Mon, Aug 19, 2013 at 9:15 AM, <ZZracing at aol.com> wrote:
>
>> .  Sometimes, the
>> ESP light will clear, after which the car will throw a hard downshift when
>> coming to a stop.  If I clear the codes, problem returns within 4 or 5
>> miles.
>> I have replaced fuel pump and fuel pressure valve, and a few vacuum lines
>> which looked a bit dodgy, with no improvement.
>> VAG Com shows:
>> 16485 - Mass Air Flow Sensor (G70)
>>               P0101 - 008 - Implausible Signal - MIL ON
>> 16685 - Cylinder 1
>>               P0301 - 008 - Misfire Detected
>> 16688 - Cylinder 4
>>               P0304 - 008 - Misfire Detected
>> 16891 - Idle Control System RPM
>>               P0507 - 001 - Higher than Expected. - Intermittent
>> 16490 - Manifold / Barometric Pressure Sensor (G71) / (F96)
>>               P0106 - 008 - Implausible Signal
>> 17550 - Load Calculation Cross Check
>>               P1142 - 002 - Lower Limit Exceeded - Intermittent
>> Readiness: 0000 1100
>>
>> Any ideas?  Thanks in advance.
>>
>> Dave Zube
The smog guy next door to my now closed shop cleans 'em all the time, 
but I could never get cleaning to work very well, nor last very long.  
There is a special MAF cleaner aerosol, don't use carb or brake 
cleaner.  Frankly, I'd just replace the MAF and be done with it.  If you 
know someone with a Worldpac account, maybe you can get a deal.  If not, 
maybe I can help you out.

John