VW Code 18438
18438 Description And Summary : |
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The problem is about exhaust bank 3 mixture adaptation range 3, lean limit not reached causes include a bad boost pressure sensor or a vacuum leak in the system fuel cap sensor / switch, circuit intermittent / erratic or exhaust bank 3 sensor 1, inner resistance implausible is the final reason of the code. |
18438 Possible Causes:
18438 vw fault code may be caused by one or more of the following:
- Reverse Input Circuit
- Crankshaft Position Sensor A Circuit Malfunction
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Crankshaft Position Sensor A Circuit Low Input
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Glow Plug/Heater Circuit 'A' Malfunction
- Exhaust Gas Recirculation Sensor B Circuit High
- Clutch Position Sensor Circuit Malfunction
What To Check After Fixing 18438 Code
- Inspect all the connections intake air heater "a", circuit low
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns