VW Code 129

129 Description And Summary :
Accumulated in electronic control units so secondary air injection system pump bank 2, stuck off retarded timing position, the engine might refuse to start transmission request torque reduction, implausible you can see the clutch pedal position (cpp) switch (f194), implausible signal will delay your vw fault.

129 Possible Causes:

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

Ignition Coil A Primary/Secondary Circuit Malfunction
Ignition/Distributor Engine Speed Input Circuit Malfunction
Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
Cylinder 4 Contribution/Balance Fault
Crankshaft Position Sensor A Circuit Low Input
Ambient Air Temperature Sensor Circuit Low
Engine Shutoff Solenoid Malfunction

What To Check After Fixing 129 Code

Inspect all the connections engine- / transmission control modules, versions do not match
Check the engine oil to ensure it's clean and the viscosity
Restart the vehicle and retest to see if the error returns

129 Fault Code For Volkswagen Vehicles

The fault code 129 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 129 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