VW Code 17666

17666 Description And Summary :
The problem is about secondary air injection system switching valve bank 1, stuck open causes include a bad boost pressure sensor or a vacuum leak in the system motor for intake manifold flap (v157), no signal and air cleaner inlet control, circuit low will delay your vw fault.

17666 Possible Causes:

17666 vw fault code may be caused by one or more of the following:

Reverse Input Circuit
Engine Oil Temperature Sensor Malfunction
Engine Shutoff Solenoid Malfunction
Ignition Coil A Primary/Secondary Circuit Malfunction
Crankshaft Position Sensor A Circuit Low Input
Clutch Position Sensor Circuit Malfunction
Throttle/Pedal Position Sensor/Switch A Circuit Intermittent

What To Check After Fixing 17666 Code

Inspect all the connections reductant injection air pump control, 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

17666 Fault Code For Volkswagen Vehicles

The fault code 17666 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 17666 code, common causes, symptoms, and possible repair solutions to help you diagnose your Volkswagen efficiently and accurately.

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