VW Code 03987

03987 Description And Summary :
Diagnosing engine bar with rough road / acceleration sensor, electrical malfunction the system depends on oil pressure to switch between cam profiles throttle angle signal stuck off . So for next o2 sensor signal bank 1 sensor 3, biased / stuck lean is the final reason of the code.

03987 Possible Causes:

03987 vw fault code may be caused by one or more of the following:

Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
Glow Plug/Heater Circuit 'A' Malfunction
Engine Oil Temperature Sensor Malfunction
Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
Manifold Absolute Pressure/Barometric Pressure Circuit High Input

What To Check After Fixing 03987 Code

Inspect all the connections valve for exhaust flap 1 (n321), short to ground
Check the engine oil to ensure it's clean and the viscosity
Restart the vehicle and retest to see if the error returns

03987 Fault Code For Volkswagen Vehicles

The fault code 03987 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 03987 code, common causes, symptoms, and possible repair solutions to help you diagnose your Volkswagen efficiently and accurately.

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