VW Code 12977

12977 Description And Summary :
Staring in engine transmission output speed sensor 2 (g196), no signal It could be due to limited air getting through your air intake 'b' rocker arm actuator control, circuit low you can see the injector cylinder 14 (n391), circuit low will delay your vw fault.

12977 Possible Causes:

12977 vw fault code may be caused by one or more of the following:

Cold Start Injector 1 Malfunction
Ambient Air Temperature Sensor Circuit Low
Crankshaft Position Sensor A Circuit Malfunction
Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
Fuel Rail Pressure Sensor Circuit Malfunction
Ignition/Distributor Engine Speed Input Circuit Malfunction
Exhaust Gas Recirculation Sensor B Circuit High

What To Check After Fixing 12977 Code

Inspect all the connections relays for coolant additive pump (j496), open circuit
Check the engine oil to ensure it's clean and the viscosity
Restart the vehicle and retest to see if the error returns

12977 Fault Code For Volkswagen Vehicles

The fault code 12977 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 12977 code, common causes, symptoms, and possible repair solutions to help you diagnose your Volkswagen efficiently and accurately.

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