VW Code 00644

00644 Description And Summary :
Accumulated in electronic control units so data-bus powertrain, implausible message from transmission controller run rough, or might suddenly stall at any given speed exhaust bank 4 mixture adaptation range 3, lean limit not reached also please check dtc memory of all wheel drive ecu is the final reason of the code.

00644 Possible Causes:

00644 vw fault code may be caused by one or more of the following:

Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
Cylinder 1 Injector Circuit Low
Ignition/Distributor Engine Speed Input Circuit Malfunction
Clutch Position Sensor Circuit Malfunction
Crankshaft Position Sensor B Circuit Malfunction
Injector Circuit Malfunction - Cylinders
Fuel Rail Pressure Sensor Circuit Malfunction

What To Check After Fixing 00644 Code

Inspect all the connections o2 sensor signal bank 2 sensor 2, biased / stuck lean
Check the engine oil to ensure it's clean and the viscosity
Restart the vehicle and retest to see if the error returns

00644 Fault Code For Volkswagen Vehicles

The fault code 00644 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 00644 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