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Re: Trouble Code P1171 Posted by sam96CS [Email] ![]() ![]() In Reply to: Re: Trouble Code P1171, skibumm100 ![]() |
Make sure if you haven't already that there are no leaks in the exhaust system between the exhaust manifold and the first O2 sensor.
For OBDII diagnostic purposes it is better to have the plugs set at 1.0 mm. The plugs and DIC need to be in good shape because a P1171 can be caused by misfiring.
Another source of vacuum leaks is the EVAP system. The EVAP purge valve should be closed when no electrical current is applied.
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