Question about Volkswagen Beetle
PO121 is Throttle Position Sensor problem. Check the connections at the TPS. Check for shorts, loose or corroded connection. Make sure there is no moisture in the connection. Inspect the sensor for cracks or damage. If all looks well then replace the TPS and reset the light with a OBD2 scan tool.
Posted on May 05, 2010
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Posted on Jan 02, 2017
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