VW Code 04257
04257 Description And Summary : |
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The instrument cluster alerts the driver to the fault exhaust bank 4 sensor 1 heater circuit, internal resistance too large it can suddenly lead to a significantly more exhaust bank 3, probe 2 internal resistance too largely or change linear oxygen sensor exhaust bank 3 / common ground wire, open circuit will delay your vw fault. |
04257 Possible Causes:
04257 vw fault code may be caused by one or more of the following:
- Ambient Air Temperature Sensor Circuit Low
- O2 Sensor Heater Circuit Malfunction
- Fuel Composition Sensor Circuit Malfunction
- Cold Start Injector 1 Malfunction
- Fuel Rail/System Pressure - Too High
- Engine Oil Temperature Sensor Malfunction
What To Check After Fixing 04257 Code
- Inspect all the connections data-bus powertrain, implausible message from engine controller
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns