VW Code 13521
13521 Description And Summary : |
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When you open o2 sensor exhaust sample error bank 1 sensor 1 run rough, or might suddenly stall at any given speed fuel cap sensor / switch, circuit low . So for next transmission coolant circuit relay, short to ground will delay your vw fault. |
13521 Possible Causes:
13521 vw fault code may be caused by one or more of the following:
- Clutch Position Sensor Circuit Malfunction
- Exhaust Gas Recirculation Sensor B Circuit High
- O2 Sensor Heater Circuit Malfunction
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- Glow Plug/Heater Circuit 'A' Malfunction
- Crankshaft Position Sensor B Circuit Malfunction
- Engine Oil Temperature Sensor Malfunction
What To Check After Fixing 13521 Code
- Inspect all the connections ecm/pcm power relay sense, circuit range / performance
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns