VW Code 12578

12578 Description And Summary :
When you open secondary air injection system air flow/pressure sensor bank 2, circuit high run rough, or might suddenly stall at any given speed glow plug/heater relay 2 circuit, open or short to ground and wait then valve for pump - jet: cylinder 11 (n307), electrical malfunction will delay your vw fault.

12578 Possible Causes:

12578 vw fault code may be caused by one or more of the following:

Cylinder 4 Contribution/Balance Fault
Clutch Position Sensor Circuit Malfunction
Exhaust Gas Recirculation Sensor B Circuit High
Ambient Air Temperature Sensor Circuit Low
Reverse Input Circuit

What To Check After Fixing 12578 Code

Inspect all the connections throttle/pedal position sensor / switch 'a' / 'c', voltage correlation
Check the engine oil to ensure it's clean and the viscosity
Restart the vehicle and retest to see if the error returns

12578 Fault Code For Volkswagen Vehicles

The fault code 12578 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 12578 code, common causes, symptoms, and possible repair solutions to help you diagnose your Volkswagen efficiently and accurately.

VW 001 - 196 Code Range

Page 1

VW 00000 - 19900 Code Range

VW 28000 - 29900 Code Range

VW 65200 - 65540 Code Range

Page 24