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Author Topic: P1171 code  (Read 439 times)

Offline Johnaitken83

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P1171 code
« on: April 07, 2020, 08:45:33 pm »
As description I have a p1171 code coming up on the reader my car is -25 fuel trim, changed lambda sensors both map sensors crankshaft sensor, checked numerous times for a boost leak or vac leak found nothing, the car is pinging and don’t want to drive it any help would be greatly appreciated

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    Offline mac1944

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    Re: P1171 code
    « Reply #1 on: April 09, 2020, 08:17:48 am »
    In the old days this was described as Pinking usually caused by weak mixture and/or ignition timing, you need to get the engine on a proper diagnostic scanner.

    Offline Matt_dab

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    Re: P1171 code
    « Reply #2 on: April 10, 2020, 05:32:27 pm »
    As description I have a p1171 code coming up on the reader my car is -25 fuel trim, changed lambda sensors both map sensors crankshaft sensor, checked numerous times for a boost leak or vac leak found nothing, the car is pinging and don’t want to drive it any help would be greatly appreciated

    Did you use good quality lambda sensors?
    As above, it needs putting onto a diagnostics and doing live running.

    Fiat specifies P1171 as "Lambda 1 mixt. strength below cat"

    -25 trim if memory serves right means the ECU is pulling the fuelling back as its running rich!

    Has it been remapped? I would check Injectors and see what each of those are doing

    Offline Johnaitken83

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    Re: P1171 code
    « Reply #3 on: April 22, 2020, 10:36:58 pm »
    Thanks guys sent all injectors off for cleaning it’s still doing it, every sensor and o2 has been genuine Bosch it’s costing a lot now just put new plugs and coil packs in and also a new fuel pump