Question about 2001 Volkswagen Beetle

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Had Qxygen Sensor replaced, but "Check Engine" light keeps on

2001 VW Beetle "Check Engine" light keeps coming back on after having Bank 1 Oxygen Sensor and Coolant Temp Sensor replaced with thermostat & seal done with flush and fill cooling system. The reason for repairs was 2 computer codes; P1296 P0171. Did the mechanic fix the right things? Car won't pass state inspection.

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  • johnnebesney Jun 22, 2009

    Is this MAF sensor costly; will it mean just a vacuum hose and how many sensors do I have to go through to get the Check Engine light out?



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System Too Lean -
Off the top of my head, I believe that fault is a lean running condition. My suggestion is to bring it to the dealer. In my experience, the most likely cause is a faulty MAF (mass air flow) sensor or a vacuum leak. Many places & websites say it can be cleaned using MAF cleaner - however the only way to know if it is working properly is to check it with an oscilloscope.

Replace your MAF sensor to get rid of this code.


COOLANT INPUT TEMPERATURE HIGH - indicates a cooling system malfunction. Is the vehicle warming up properly & reaching operating temp in a normal manner? Usually it is something like a stuck open thermostat that makes it take too long for the engine to warm up. It could also be a problem with the coolant temp sensor.

DO NOT return to this mechanic - as neither of these codes has to do with emissions!

Thanks for using FixYa - if you require further clarification - please use the "Continue with this Expert" option so we are connected in the future.

Thanks :D

Posted on Jun 21, 2009

  • blueextc3221
    blueextc3221 Jun 22, 2009

    MAF sensor is HERE - $199.99 plus $45.00 core charge.

    Coolant temp sensor is HERE - $6.99

    These should be the only 2 sensors you require.

    The MAF sensor will need 4 cycles (hot and cold) to callibrate. Your CEL will stay lit, and just go back after a few days to have the codes erased and reset it.




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