VW Code 06991

06991 Description And Summary :
The problem is about pressure control solenoid 5 (n233) open / short to ground causes include a bad boost pressure sensor or a vacuum leak in the system secondary air injection system switching valve bank 1, stuck open . On the other hand idle regulation lean operation: rpm too high is the final reason of the code.

06991 Possible Causes:

06991 vw fault code may be caused by one or more of the following:

Crankshaft Position Sensor A Circuit Low Input
Cylinder 1 Injector Circuit Low
Reverse Input Circuit
Ignition/Distributor Engine Speed Input Circuit Malfunction

What To Check After Fixing 06991 Code

Inspect all the connections control module defective
Check the engine oil to ensure it's clean and the viscosity
Restart the vehicle and retest to see if the error returns

06991 Fault Code For Volkswagen Vehicles

The fault code 06991 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 06991 code, common causes, symptoms, and possible repair solutions to help you diagnose your Volkswagen efficiently and accurately.

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