Question about 2001 Volkswagen Beetle
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.
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!
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Posted on Jun 21, 2009
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Posted on Jan 02, 2017
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