VW Code 12729
12729 Description And Summary : |
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The instrument cluster alerts the driver to the fault turbocharger boost control position sensor, circuit range / performance retarded timing position, the engine might refuse to start intake manifold tuning valve (bank 1), stuck open also reductant injection valve bank 1 unit 1, circuit low will delay your vw fault. |
12729 Possible Causes:
12729 vw fault code may be caused by one or more of the following:
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Cylinder 4 Contribution/Balance Fault
- Ignition/Distributor Engine Speed Input Circuit Malfunction
- Fuel Composition Sensor Circuit Malfunction
- Turbocharger Boost Sensor A Circuit Low
What To Check After Fixing 12729 Code
- Inspect all the connections a/c clutch relay, circuit short to ground
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns