OBD 2 help
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Joined: Sep 2005
Posts: 13,664
RE: OBD 2 help
Strange. Could be a bad ECU. If you take the knee pannel out, the OBD port/wiring to it will be exposed. Check that out. There are 2 small plates that cover up a couple bolts on each side of the steering wheel on the pannel, then 1 or 2 by the fuse pannel. The knee pannel should slide out and check the wiring to the obd port on the left. If your knee pannel was ever taken out for whatever reason, they might had forgotten to hook the obd port wiring back up.
Site Moderator
Joined: Feb 2007
Posts: 9,004
From: Nor Cal
RE: OBD 2 help
The OBD wiring doesn't come apart from the connector, if they for got to put the connetor on there would be a huge hole where the port should be. Stick your flashlight inside the connetor end of the OBD port and make sure no pins have been bent or corroded. If thats ok you NEED to get access to a VAG COM or factory scanner to check sporatic miss fires, and you need access the miss-fire counter on data block 15 or 16. From there you can find out if the car is really miss firing or if its the ECM iscreating miss fire codes that don't exist on the engine. Now if you don't find any miss-fires registered on data block 15 or 16 with the engine running then you need to get the ECM coding checked by the dealer to make sure it hasn't changed, when an ECM has internal shorts sometimes it won't recognize the VIN and give a coding of 0, or some bogus number. When it does that 9 times out of 10 the ECM has to be replaced.
Site Moderator
Joined: Sep 2005
Posts: 13,664
RE: OBD 2 help
ORIGINAL: auditech79
The OBD wiring doesn't come apart from the connector, if they for got to put the connetor on there would be a huge hole where the port should be. Stick your flashlight inside the connetor end of the OBD port and make sure no pins have been bent or corroded. If thats ok you NEED to get access to a VAG COM or factory scanner to check sporatic miss fires, and you need access the miss-fire counter on data block 15 or 16. From there you can find out if the car is really miss firing or if its the ECM iscreating miss fire codes that don't exist on the engine. Now if you don't find any miss-fires registered on data block 15 or 16 with the engine running then you need to get the ECM coding checked by the dealer to make sure it hasn't changed, when an ECM has internal shorts sometimes it won't recognize the VIN and give a coding of 0, or some bogus number. When it does that 9 times out of 10 the ECM has to be replaced.
The OBD wiring doesn't come apart from the connector, if they for got to put the connetor on there would be a huge hole where the port should be. Stick your flashlight inside the connetor end of the OBD port and make sure no pins have been bent or corroded. If thats ok you NEED to get access to a VAG COM or factory scanner to check sporatic miss fires, and you need access the miss-fire counter on data block 15 or 16. From there you can find out if the car is really miss firing or if its the ECM iscreating miss fire codes that don't exist on the engine. Now if you don't find any miss-fires registered on data block 15 or 16 with the engine running then you need to get the ECM coding checked by the dealer to make sure it hasn't changed, when an ECM has internal shorts sometimes it won't recognize the VIN and give a coding of 0, or some bogus number. When it does that 9 times out of 10 the ECM has to be replaced.
