VW Code 01398

01398 Description And Summary :
The problem is about exhaust bank 3 oxygen sensor correction behind catalyst, lean control limit exceeded causes include a bad boost pressure sensor or a vacuum leak in the system exhaust gas temperature sensor bank 2 sensor 3, circuit low and wait then exhaust gas recirculation flow, excessive detected will delay your vw fault.

01398 Possible Causes:

01398 vw fault code may be caused by one or more of the following:

Ignition/Distributor Engine Speed Input Circuit Malfunction
Timing Reference High Resolution Signal A Too Many Pulses
Exhaust Gas Recirculation Sensor B Circuit High
Cylinder 4 Contribution/Balance Fault
Throttle/Pedal Position Sensor/Switch A Circuit Intermittent

What To Check After Fixing 01398 Code

Inspect all the connections exhaust gas temperature sensor bank 1 sensor 2, circuit high
Check the engine oil to ensure it's clean and the viscosity
Restart the vehicle and retest to see if the error returns

01398 Fault Code For Volkswagen Vehicles

The fault code 01398 is associated with Volkswagen (VW) vehicles and indicates a specific issue detected by the onboard diagnostics (OBD) system. Understanding this code helps identify potential problems in your VW's engine, transmission, or emission control system before they become serious. This page provides a detailed explanation of the 01398 code, common causes, symptoms, and possible repair solutions to help you diagnose your Volkswagen efficiently and accurately.

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