Bmw 325i U0121 Engine Error Code

When you check Bmw 325i car engine light came on code U0121 the reason should be Engine Light ON (or Service Engine Soon Warning Light). However Bmw manufacturer may have a different definition for the U0121 OBD-II Diagnostic Network (U) Trouble Code. So you should chech it on our car models.

Do you have fresh, clean fuel in the tank? If it's empty, fill it up and go! If it's full, check U0121 Bmw 325i that the fuel shut-off valve is open and that it is clean. Stale fuel, dirt and debris are the most common cause of outdoor power equipment not starting properly. If you store equipment with untreated gas in the tank, it can lead to engine damage.

Bmw 325i U0121 OBD-II Diagnostic Network (U) Trouble Code Description Bmw 325i car U0121 OBD-II Trouble Code Modules connected to the high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and comm Reason For Bmw 325i U0121 Code The reason of Bmw 325i U0121 OBD-II Engine Error Code is U0121 Lost Communication With Electronic Brake Control Module.

If your vehicle failed a U0121 Bmw 325i test and the 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 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 U0121 Bmw 325i: Any conditions that might cause ignition misfire, an overly rich or lean fuel condition, or loss of compression.

Bmw 325i U0121 Possible Solution :

Power Steering Pressure (PSP) Switch Signal Malfunction The PCM counts the number of times vehicle speed transitions from 0 to a calibratable speed. After a calibratable number of speed transitions the PCM expects that the PSP input should have changed. This DTC is set if the transition is not detected. Vehicle towed with engine running Power steering hydraulic concern was repaired but DTC was not erased PSP switch/shorting bar damaged SIG RTN circuit open PSP circuit open or shorted to SIGRTN PCM damaged Check, if possible, if vehicle was towed or power steering service was performed. Observe PSP V PID while checking wires for intermittents.

What does fault code U0121 mean for Bmw 325i ? What does a diagnostic reading U0121 mean for Bmw 325i ? How to fix OBD2 Code U0121 for Bmw 325i ? What do we know about U0121 code for Bmw 325i ?