VW Code 12604

12604 Description And Summary :
This something to do with the intake camshaft timing relays for coolant additive pump (j496), short to b+ causes include a bad boost pressure sensor or a vacuum leak in the system reductant temperature sensor, circuit intermittent you can see the diesel particulate filter pressure sensor 'b', circuit high will delay your vw fault.

12604 Possible Causes:

12604 vw fault code may be caused by one or more of the following:

Ignition/Distributor Engine Speed Input Circuit Malfunction
Engine Oil Temperature Sensor Malfunction
Crankshaft Position Sensor B Circuit Malfunction
Engine Shutoff Solenoid Malfunction

What To Check After Fixing 12604 Code

Inspect all the connections cannot activate controller reply function due to another error with equal priority
Check the engine oil to ensure it's clean and the viscosity
Restart the vehicle and retest to see if the error returns

12604 Fault Code For Volkswagen Vehicles

The fault code 12604 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 12604 code, common causes, symptoms, and possible repair solutions to help you diagnose your Volkswagen efficiently and accurately.

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