Mercedes-benz 200d P2251 Engine Error Code

When you check Mercedes-benz 200d car engine light came on code P2251 the reason should be Engine Light ON (or Service Engine Soon Warning Light). However Mercedes-benz manufacturer may have a different definition for the P2251 OBD-II Diagnostic Powertrain (P) Trouble Code. So you should chech it on our car models.

To solve P2251 Mercedes-benz 200d problem, you'll have to remove the muffler, crankcase and other components blocking the valve chamber. Then, remove the cylinder head bolts (label for easy re-installation) Adjust the jaws of the valve spring compressor until they touch the top and bottom of the valve chamber Push the tool in to compress the spring and tighten the jaws Remove the retainers and lift out the valves , compressors and springs

Mercedes-benz 200d P2251 OBD-II Diagnostic Powertrain (P) Trouble Code Description Mercedes-benz 200d car P2251 OBD-II Trouble Code The rear air/fuel ratio (A/F) sensor (bank 1, sensor 1) is installed in the exhaust manifold and detects oxygen content in the exhaust gas. The rear A/F sensor transmits a signal to the powertrain con Reason For Mercedes-benz 200d P2251 Code The reason of Mercedes-benz 200d P2251 OBD-II Engine Error Code is P2251 O2 Sensor Negative Current Control Circuit/Open Bank 1 Sensor 1 .

If your vehicle failed a P2251 Mercedes-benz 200d 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 P2251 Mercedes-benz 200d: Any conditions that might cause ignition misfire, an overly rich or lean fuel condition, or loss of compression.

Mercedes-benz 200d P2251 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 P2251 mean for Mercedes-benz 200d ? What does a diagnostic reading P2251 mean for Mercedes-benz 200d ? How to fix OBD2 Code P2251 for Mercedes-benz 200d ? What do we know about P2251 code for Mercedes-benz 200d ?