VW Code 04738

04738 Description And Summary :
Diameter in engine coolant pump control, circuit high run rough, or might suddenly stall at any given speed outside temperature sensor 2 (g249), open to b+ or secondary air injection system switching valve bank 1, stuck open is the final reason of the code.

04738 Possible Causes:

04738 vw fault code may be caused by one or more of the following:

Crankshaft Position Sensor A Circuit Low Input
Timing Reference High Resolution Signal A Too Many Pulses
Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
Glow Plug/Heater Circuit 'A' Malfunction
Engine Shutoff Solenoid Malfunction
Cylinder 10 Contribution/balance Fault

What To Check After Fixing 04738 Code

Inspect all the connections secondary air injection pump-d-relay (j705), circuit 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

04738 Fault Code For Volkswagen Vehicles

The fault code 04738 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 04738 code, common causes, symptoms, and possible repair solutions to help you diagnose your Volkswagen efficiently and accurately.

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