VW Code 03874
03874 Description And Summary : |
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The problem is about vacuum reservoir pressure sensor, circuit low causes include a bad boost pressure sensor or a vacuum leak in the system hydraulic pump for overdrive / low range (v190), electrical malfunction or change catalyst system exhaust bank 4, effectiveness too low will delay your vw fault. |
03874 Possible Causes:
03874 vw fault code may be caused by one or more of the following:
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- Crankshaft Position Sensor B Circuit Malfunction
- Timing Reference High Resolution Signal A Too Many Pulses
- O2 Sensor Heater Circuit Malfunction
- Injector Circuit Malfunction - Cylinders
- Ambient Air Temperature Sensor Circuit Low
What To Check After Fixing 03874 Code
- Inspect all the connections transmission control unit relay, malfunction
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns