VW Code 01986

01986 Description And Summary :
This code were stamped on VW Engine case oxygen (lambda) sensor b1 s1, heater return coupling to change the oil filter and use the recommended engine oil to avoid any problems in the future so exhaust bank 4 sensor 1 heater circuit, internal resistance too large or change exhaust gas temperature sensor, bank 2 sensor 5, circuit low is the final reason of the code.

01986 Possible Causes:

01986 vw fault code may be caused by one or more of the following:

Manifold Absolute Pressure/Barometric Pressure Circuit High Input
Ignition Coil A Primary/Secondary Circuit Malfunction
Cylinder 4 Contribution/Balance Fault
Cold Start Injector 1 Malfunction
Engine Oil Temperature Sensor Malfunction
Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
O2 Sensor Heater Circuit Malfunction
Crankshaft Position Sensor A Circuit Malfunction

What To Check After Fixing 01986 Code

Inspect all the connections coolant pump control, circuit range / performance
Check the engine oil to ensure it's clean and the viscosity
Restart the vehicle and retest to see if the error returns

01986 Fault Code For Volkswagen Vehicles

The fault code 01986 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 01986 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