VW Code 17121

17121 Description And Summary :
Diagnosing engine bar with exhaust bank 3 oxygen sensor correction behind catalyst, rich control limit exceeded run rough, or might suddenly stall at any given speed throttle/pedal position sensor 'd', maximum stop performance also accelerator pedal position sensor 2 (g185), signal too high is the final reason of the code.

17121 Possible Causes:

17121 vw fault code may be caused by one or more of the following:

Crankshaft Position Sensor A Circuit Low Input
Crankshaft Position Sensor A Circuit Malfunction
Fuel Rail/System Pressure - Too High
Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
Cold Start Injector 1 Malfunction
Ambient Air Temperature Sensor Circuit Low
Ignition Coil A Primary/Secondary Circuit Malfunction

What To Check After Fixing 17121 Code

Inspect all the connections reductant injection valve bank 1 unit 2, circuit / open
Check the engine oil to ensure it's clean and the viscosity
Restart the vehicle and retest to see if the error returns

17121 Fault Code For Volkswagen Vehicles

The fault code 17121 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 17121 code, common causes, symptoms, and possible repair solutions to help you diagnose your Volkswagen efficiently and accurately.

VW 001 - 196 Code Range

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VW 65200 - 65540 Code Range

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