C0401 Dodge Polara OBD Code

OBD/2 C0401 error code description and symptoms.

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 C0401 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.

C0401 Dodge Polara Error Code Repair Process :

If your horn switch circuit failure check engine light is illuminated, it's best to take it in for diagnostic testing, which can feel like a hassle. Because while the lights vary in appearance from vehicle to vehicle, all have the same basic meaning: There's a problem with the car's emissions system. The on-board diagnostics system C0401 and engine control unit are in charge of monitoring a bunch of different horn switch circuit failure, and if they get a reading that's a little out of whack, up pops the check engine light.

Common Causes of Dodge Polara C0401 OBD2 Code

A common cause of code C0401 is the failure of Horn Switch Circuit Failure, but there are several other possible causes as well, such as ;

Failures of clutch motion/travel sensors.
Faulty Air Flow Meter
Fuel injectors may be faulty
Incorrect Positive Crankcase Ventilation (PCV) hose connection

C0401 is a kind of Chassis Trouble Code

Diagnosing chassis noises can be one of the most frustrating problems technicians face. Fortunately, manufacturers have engineered noise, vibration and harshness (NVH) diagnostic techniques and equipment to find the source of the noise.

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

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C0401 Dodge Polara OBD Code

C0401 Dodge Polara Error Code Repair Process :

Common Causes of Dodge Polara C0401 OBD2 Code

C0401 code for other Dodge cars