VW Code 14991

14991 Description And Summary :
Staring in engine exhaust bank 4, sensor 2 heater circuit, short-circuit after mass retarded timing position, the engine might refuse to start ecm/pcm power input, signal low or cylinder 9 above knock threshold is the final reason of the code.

14991 Possible Causes:

14991 vw fault code may be caused by one or more of the following:

Glow Plug/Heater Circuit 'A' Malfunction
Cylinder 4 Contribution/Balance Fault
Timing Reference High Resolution Signal A Too Many Pulses
Crankshaft Position Sensor A Circuit Low Input
Cylinder 1 Injector Circuit Low
Fuel Rail/System Pressure - Too High
Crankshaft Position Sensor A Circuit Malfunction
Clutch Position Sensor Circuit Malfunction

What To Check After Fixing 14991 Code

Inspect all the connections linear oxygen sensor exhaust bank 4 / common ground wire, short to ground
Check the engine oil to ensure it's clean and the viscosity
Restart the vehicle and retest to see if the error returns

14991 Fault Code For Volkswagen Vehicles

The fault code 14991 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 14991 code, common causes, symptoms, and possible repair solutions to help you diagnose your Volkswagen efficiently and accurately.

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