B1281 Mercedes C Class OBD Code

OBD/2 B1281 error code description and symptoms.

Intake Manifold Runner Control Malfunction (Stuck Open) The IMRC system is monitored for failure during continuous, key ON engine OFF or key ON engine running self-test. The test fails when the signal on the monitor pin is less than an expected calibrated range at closed throttle. IMRC monitor signal circuit shorted to PWR GND or SIG RTN Damaged IMRC actuator Damaged PCM An IMRCM PID reading approximately near 1 volt at closed throttle may indicate a fault.

One example of this would be when an automatic vehicle in placed in gear. To prevent the added drag from the torque converter and transmission from reducing the idling speed, the PCM will command the idle control valve to allow more air to enter the engine, while at the same time, adjusting the injector pulse width to inject more fuel to suit the increased amount of air. Note that the idle air control valve is closed by the PCM when the throttle plate is opened to prevent excess air from entering the engine.

B1281 Mercedes C Class Error Code Repair Process :

For b1281 servo motor potentiometer coolair circuit open check engine light is perhaps the most troubling of lights because it could mean so many different things, from you didn't screw the gas cap on tightly enough to look out for pistons flying through the hood and into the stratosphere. The easiest way to find out what this light is telling you is to hook your vehicle up to a scan tool. B1281 error code diagnostic tool looks a little like an oversized calculator and plugs into a communication port inside the car. After you instruct it to perform the scan, it speaks b1281 servo motor potentiometer coolair circuit open with your car's computers to find out exactly what's prompting the light to turn on.

Common Causes of Mercedes C Class 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 ;

1Camshaft Position Sensor circuit poor electrical connection
EVAP system hose leaking
Foreign matter caught in fuel filler cap
Damaged ECM

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.

About Us | Contact | Privacy

B1281 Mercedes C Class OBD Code

B1281 Mercedes C Class Error Code Repair Process :

Common Causes of Mercedes C Class B1281 OBD2 Code

B1281 code for other Mercedes cars