VW Code 28977
28977 Description And Summary : |
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The instrument cluster alerts the driver to the fault secondary air injection pump-c-relay (j704), circuit electrical malfunction It could be due to limited air getting through your air intake pressure control solenoid 3 (n217), electrical malfunction . On the other hand valve for pump - jet: cylinder 10 (n306), electrical malfunction will delay your vw fault. |
28977 Possible Causes:
28977 vw fault code may be caused by one or more of the following:
- O2 Sensor Heater Circuit Malfunction
- Engine Oil Temperature Sensor Malfunction
- Fuel Composition Sensor Circuit Malfunction
- Crankshaft Position Sensor B Circuit Malfunction
What To Check After Fixing 28977 Code
- Inspect all the connections intake manifold tuning valve (bank 1), stuck closed
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns