B21AB Trouble Code

View B21AB obd/2 error code description and symptoms. B21AB 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.

Gear changes are accomplished by a command from the TCM to energize the clutch actuator to release the clutch; after which various actuators inside the transmission disengage the current gear, and depending on current operating conditions, engage the next higher or lower gear ratio. All of this happens much faster than a human driver could change gears, and in most applications, gear changes are as smooth and seamless as on any fully automatic transmission.

B21AB Error Code Repair Process :

If your vehicle failed a B21AB test and the B21AB Check Engine Light is NOT on, chances are you have a problem with the OBDII system, a burned out MIL lamp, or a faulty catalytic converter. The converter is essentially an afterburner that cleans up the exhaust after it exits the engine. The OBDII system uses yaw rate sensor circuit failure a ownstream oxygen sensor to monitor the efficiency of the converter, and it should detect a drop in converter efficiency if the converter has been contaminated or is failing (ignition misfiring, leaky exhaust valves, and oil burning can all damage the converter). What you want to look yaw rate sensor circuit failure: Any conditions that might cause ignition misfire, an overly rich or lean fuel condition, or loss of compression. Use your OBD Express DIY to look at the oxygen sensor outputs, coolant temperature, airflow, calculated engine load, and inlet air temperature.

B21AB 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 B21AB

A common cause of code B21AB is the failure of Yaw Rate Sensor circuit Failure, but there are several other possible causes as well, such as ;

Failures of clutch motion/travel sensors.
Clogged or faulty fuel injector (s)
Faulty Mass Air Flow (MAF) sensor
Air fuel ratio (A/F) Sensor 1 Bank 1 harness is open or shorted

B21AB code for all cars

You can view according B21AB DTC for your car model. We selected several models to see obd2 solutions click and view it.

+B21AB Volkswagen Jetta

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

About Us | Contact | Privacy