Need Help Lots of CEL's
07-06-2015, 01:11 PM
#1
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Need Help Lots of CEL's
Hey I have a 2000 A6 2.7t that last night started misfiring/cutting out especially under load. CEL came on solid than a about 2 miles latter flashed for about 10-20 seconds went back to solid. Pulled the codes as follows this morning.
*Mass Air Flow Sensor Signal too Low
*Charge Pressure Control Negative Deviation
*Exhaust Temperature Sensor 1 open or short to Plus
*Exhaust Temperature Sensor 2 open or short to Plus
*Fuel Trim Bank 2 System too Rich
*O2 Sensor Bank 2 Sensor 1 Internal Resistance too High
*Random/Multiple Cylinder Misfire Detected
*Cylinder 3 Misfire Detected
*Cylinder 4 Misfire Detected
Also have a ABS sensor light on the digital display in the dash that has came on.
I think I am going to start with the MAF and hope it will clear out some of the other codes but I'm looking to see if I'm on the right track or if anyone has a better idea of whats going on.
Thank you all for your time,
MAXXO6
*Mass Air Flow Sensor Signal too Low
*Charge Pressure Control Negative Deviation
*Exhaust Temperature Sensor 1 open or short to Plus
*Exhaust Temperature Sensor 2 open or short to Plus
*Fuel Trim Bank 2 System too Rich
*O2 Sensor Bank 2 Sensor 1 Internal Resistance too High
*Random/Multiple Cylinder Misfire Detected
*Cylinder 3 Misfire Detected
*Cylinder 4 Misfire Detected
Also have a ABS sensor light on the digital display in the dash that has came on.
I think I am going to start with the MAF and hope it will clear out some of the other codes but I'm looking to see if I'm on the right track or if anyone has a better idea of whats going on.
Thank you all for your time,
MAXXO6
07-07-2015, 02:42 AM
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No luck
Put a new MAF in last night and cleared the codes, no luck. Car is still running like crap, missfiring especially under load, low/no/inconsistent boost. Anyone have some thoughts?
07-08-2015, 05:42 AM
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Making Progress
Okay new MAF, Spark Plugs, and Plug Boots. Missfire and CEL's are cleared, but no boost with low power.
Checked the Diverter Vales they are in working order. Checked the (N75) Diverter Valve Solenoid I think its called? But than I broke off the vacuum line that goes to the vacuum distribution piece.
Running the car with that piece broken I now have boost but no pressure release.
I'll be putting a new N75 solenoid on soon seeing its broken now anyway. Can you guys help me how to test the N249 Diverter Valve sensor? Also the names I would use to order these would be fantastic! Any other input or things I should look into would be great thank you all.
Checked the Diverter Vales they are in working order. Checked the (N75) Diverter Valve Solenoid I think its called? But than I broke off the vacuum line that goes to the vacuum distribution piece.
Running the car with that piece broken I now have boost but no pressure release.
I'll be putting a new N75 solenoid on soon seeing its broken now anyway. Can you guys help me how to test the N249 Diverter Valve sensor? Also the names I would use to order these would be fantastic! Any other input or things I should look into would be great thank you all.
Last edited by MAXXO6; 07-08-2015 at 05:46 AM. Reason: Also moved cilinder 3 coil to 6 misfire didn't follow
07-08-2015, 05:43 AM
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07-08-2015, 09:06 AM
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N75
Called around, dealership prices are crazy compared to online for the N75. Does someone have a link to a site they bought their's they would recommend? Also I think I am going to need the N249, a link for that would be greatly appreciated. Thank you.
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07-08-2015, 06:57 PM
#8
Sorry, not a turbo expert.
The point is when you have a lot of error codes at the same time look for a common cause.
Very often a loose connector, bad battery/charging system and/or a bad ground can cause a lot of different codes all at the same time.
The point is when you have a lot of error codes at the same time look for a common cause.
Very often a loose connector, bad battery/charging system and/or a bad ground can cause a lot of different codes all at the same time.
Last edited by N_Jay; 07-08-2015 at 07:53 PM.
07-13-2015, 10:36 AM
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Moving to new thread for new trouble shooting
Have the car running with no CEL's, starting a new thread for trouble shooting unknown fault. N_Jay thank you for your input.
https://www.audiworld.com/forums/a6-.../#post24704985
https://www.audiworld.com/forums/a6-.../#post24704985
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