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Hey guys, please help with these codes in my new car...

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Old 12-29-2005, 04:54 AM
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Default Hey guys, please help with these codes in my new car...

What I don't get is the Short to Ground and Open Circuit for the N75... Also how I can run too rich then too lean... Could the misfires be because of my plugs I just installed? NGK V-Power BKR6E's but they are resistor plugs and don't know if that matters... In all seriousness, I think that 99% of these have to do with the Split Second boost controler that is in there which I am taking out and hope that no one butchered the stock wire harness too much for the ECU!! Oh yeah, and the car has a random miss/hesitation/lack of power too!! Never felt limp mode before but I am guessing this is it!? But I only got a CEL for the first set and no CEL for the 2nd... So I guess it isn't limp cause the CEL never came on... But I go to floor it and feels like NO boost at all or even like the engine is on!? I just want to get the car fixed and chipped the right way!



8 Faults Found:
17955 - Boost Pressure Regulation Valve (N75): Short to Ground
P1547 - 35-10 - - - Intermittent
16795 - Secondary Air Injection System: Incorrect Flow Detected
P0411 - 35-00 - -
17545 - Fuel Trim: Bank 1 (Add): System too Rich
P1137 - 35-00 - -
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-00 - -
16685 - Cylinder 1 Misfire Detected
P0301 - 35-00 - -
17536 - Fuel Trim: Bank 1 (Mult): System too Lean
P1128 - 35-10 - - - Intermittent
16687 - Cylinder 3 Misfire Detected
P0303 - 35-00 - -
16686 - Cylinder 2 Misfire Detected
P0302 - 35-00 - -
2 hours later after clearing other codes....
17956 - Boost Pressure Regulation Valve (N75): Open Circuit
P1548 - 35-10 - - - Intermittent
17545 - Fuel Trim: Bank 1 (Add): System too Rich
P1137 - 35-00 - -
17736 - Knock-Control: Cylinder 4: Regulation Limit Exceeded
P1328 - 35-10 - - - Intermittent
17734 - Knock-Control: Cylinder 2: Regulation Limit Exceeded
P1326 - 35-10 - - - Intermittent
17536 - Fuel Trim: Bank 1 (Mult): System too Lean
P1128 - 35-10 - - - Intermittent
Old 12-29-2005, 04:59 AM
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Default If the wiring is hacked I'd take it to a reputable facility and have it repaired

Unless you have a service manual with wiring diagrams and want to repair the wiring yourself.
Old 12-29-2005, 05:09 AM
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Default Well, I do wiring for a living so that won't be a problem, It will just take up time I don't it to..

Plus, I think they just use wire taps...
Old 12-29-2005, 05:10 AM
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Oh yeah, car is a late 2001 A4 1.8tqm with 86k miles, dp, borla, K&N, split second boost control
Old 12-29-2005, 07:44 AM
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put the car back to stock. then post the codes.
Old 12-30-2005, 01:32 PM
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and ditch the k&n!
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