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Thread: Fault code advice 1.8T: Last post please

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    Paid Member Finite's Avatar
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    Default Fault code advice 1.8T: Last post please

    So I've found another A3 8L 1.8T, but this one has only been off road 2 months and is a run out 03.

    It seems to run static ok, but has frequently lit the EML and lately EPC. The DIS unfortunately unreadable.

    4 Faults Found:
    17705 - Pressure Drop between Turbo and Throttle Valve (check D.V.!)
    P1297 - 35-10 - - - Intermittent
    17925 - Main Relay (J271): Electrical Malfunction
    P1517 - 35-10 - - - Intermittent
    17545 - Fuel Trim: Bank 1 (Add): System too Rich
    P1137 - 35-10 - - - Intermittent

    Not much recent service history, but the oil didn't smell to bad and the top end is quiet at 90°C compared the the 150K motor I looked at before.

    Not too concerned about the Pressure Drop, but the Fuel Trim: System too Rich is a bit of a concern.
    Last edited by Finite; Yesterday at 13:40.
    1989 5dr MK II 8v Helios Blue Bodyguards® 4 Nitrile Edition. 21 years of ownage.

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    Paid Member Finite's Avatar
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    Search results better this morning with the right terms.

    It could all be simple as the dipstick tube is loose and can be pulled up. The air filters must be over due along with the oil, but it could be expensive also.
    1989 5dr MK II 8v Helios Blue Bodyguards® 4 Nitrile Edition. 21 years of ownage.

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    Paid Member Finite's Avatar
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    Right I guess this is the crux of the matter. How likely is it to pass the emissions with this:

    17545 - Fuel Trim: Bank 1 (Add): System too Rich
    P1137 - 35-10 - - - Intermittent

    It is an alleged low mileage engine. No sign or smell of significant over fuelling at the exhaust or hunting.
    1989 5dr MK II 8v Helios Blue Bodyguards® 4 Nitrile Edition. 21 years of ownage.

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    Paid Member Finite's Avatar
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    This might be a go again. As I've read these fault codes are associated with limp mode. Is it possible to have them without limp mode?

    17705 - Pressure Drop between Turbo and Throttle Valve (check D.V.!)
    P1297 - 35-10 - - - Intermittent
    17545 - Fuel Trim: Bank 1 (Add): System too Rich
    P1137 - 35-10 - - - Intermittent

    Cheers.
    1989 5dr MK II 8v Helios Blue Bodyguards® 4 Nitrile Edition. 21 years of ownage.

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    Dump Valve is fubared or there is a leak in the charge pipe such that the system cannot achieve desired load and you might find your Lambda control is at -25 or attempting to pull fuel put at the limit, due to a poor FPR or lack of air measurement from the MAF.

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