B1281 Mercedes S 500 OBD Code

OBD/2 B1281 error code description and symptoms.

Output Shaft Speed sensor circuit intermittent failure The output shaft speed sensor signal to the PCM is irregular or interrupted.
Harness connector not properly seated Harness intermittently shorted, or open Harness connector damaged OSS sensor damaged, or not installed properly Verify harness and connector integrity Verify OSS sensor proper installation.

Circuit High Input codes like B1281 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.

B1281 Mercedes S 500 Error Code Repair Process :

If your vehicle failed a B1281 test and the B1281 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 b1281 servo motor potentiometer coolair circuit open 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 b1281 servo motor potentiometer coolair circuit open: 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.

Common Causes of Mercedes S 500 B1281 OBD2 Code

A common cause of code B1281 is the failure of B1281 Servo Motor Potentiometer Coolair Circuit Open, but there are several other possible causes as well, such as ;

Camshaft Position Sensor harness is open or shorted
Continuous oil flow to the VCT piston chamber
Ignition coils circuit poor electrical connection
Variable Camshaft Timing (VCT) position circuit poor electrical connection

B1281 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.

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

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B1281 Mercedes S 500 OBD Code

B1281 Mercedes S 500 Error Code Repair Process :

Common Causes of Mercedes S 500 B1281 OBD2 Code

B1281 code for other Mercedes cars