VW Code 29721
29721 Description And Summary : |
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When you open secondary air injection system air flow/pressure sensor bank 2, circuit high It could be due to limited air getting through your air intake turbocharger boost control position sensor, circuit high and wait then ignition switch run position, circuit is the final reason of the code. |
29721 Possible Causes:
29721 vw fault code may be caused by one or more of the following:
- Ambient Air Temperature Sensor Circuit Low
- Crankshaft Position Sensor A Circuit Malfunction
- Crankshaft Position Sensor B Circuit Malfunction
- Engine Oil Temperature Sensor Malfunction
- Timing Reference High Resolution Signal A Too Many Pulses
What To Check After Fixing 29721 Code
- Inspect all the connections data-bus powertrain, missing message from fuel injection pump
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns