B3901 Trouble Code

View B3901 obd/2 error code description and symptoms. B3901 engine photo

Brake Switch Circuit Input Malfunction Indicates PCM did not receive a brake pedal position (BPP) input. Open or short in BPP circuit Open or short in stoplamp circuits Damaged PCM Malfunction in module(s) connected to BPP circuit. (Rear Electronic Module [REM] Windstar and LS6/LS8 or Lighting Control Module (LCM) Continental and Town Car. Damaged brake switch Misadjusted brake switch Check for proper function of stoplamps.

Circuit High Input codes like B3901 are mostly caused by defective alternators that develop excessive voltages, although there may be other causes as well, such as short circuits that 'leak' current into a particular system from other, unrelated systems that work on higher voltages. Note that in the case of short circuits that leak power into a control circuit, there is likely to be other, seemingly unrelated trouble codes present along with the code(s) being investigated. Diagnosing a 'high input' code will always involve a thorough testing of the charging system as a first step, followed by measures to isolate the system from all other possible sources of power during resistance, continuity, and reference voltage tests.

B3901 Error Code Repair Process :

The scent may B3901 signal oil or coolant leaking from their normally closed-loop systems, or it may indicate dangerous exhaust gases invading your car's interior. Car and truck exhaust contains toxic gases such B3901, so if the inside of your car ignition start circuit short to battery as if you were standing behind your car, get out and get it fixed. Fight the urge to take a little nap first. So sleepy. That's the carbon monoxide talking, friends. At least open a window on your way to the shop.

B3901 is a kind of Body Trouble Code

Auto body problems aren't always easy to spot. Diagnosing auto body problems sometimes requires a little know-how. In this section you'll find articles dedicated to teaching you how to diagnose auto body problems.

Common Causes of B3901

A common cause of code B3901 is the failure of Ignition Start Circuit Short To Battery, but there are several other possible causes as well, such as ;

Failures of clutch motion/travel sensors.
Faulty Intake Valve Timing Control Solenoid Valve
Air fuel ratio (A/F) Sensor 1 Bank 1 harness is open or shorted
Spark plugs may be faulty

B3901 code for all cars

You can view according B3901 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+B3901 Chevrolet Adventure

+B3901 Darracq 2.5-litre

+B3901 Jowett Jupiter

+B3901 Toyota Aa

+B3901 Mitsubishi 500

Engine OBD 2 Codes website is a freeware resource center for engine trouble codes.

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