VW Code 03987

03987 Description And Summary :
Diameter in engine oxygen (lambda) sensor b3 s1, heater return coupling causes include a bad boost pressure sensor or a vacuum leak in the system exhaust gas temperature sensor, bank 1 sensor 4, circuit intermittent / erratic also power supply (b+) terminal 15, open circuit is the final reason of the code.

03987 Possible Causes:

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

Timing Reference High Resolution Signal A Too Many Pulses
Glow Plug/Heater Circuit 'A' Malfunction
Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
Engine Shutoff Solenoid Malfunction
Fuel Temperature Sensor B Circuit Range/Performance

What To Check After Fixing 03987 Code

Inspect all the connections please check dtc memory of adr control module
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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