B1281 Mercedes Cl Class OBD Code

OBD/2 B1281 error code description and symptoms.

Engine Coolant Temperature (ECT) Circuit High Input Indicates the sensor signal is greater than Self-Test maximum. The ECT sensor maximum is 4.6 volts or -50 C (-58 F). Note on some vehicles that are not equipped with an ECT sensor, CHT can be used and can set this DTC. Open circuit in harness Sensor signal short to power Damaged PCM Improper harness connection Damaged sensor ECT V PID reading greater than 4.6 volts with key ON and engine OFF or during any engine operating mode indicates a hard fault.

As the engine heats up and combustion becomes easier and more complete, the PCM will command the idling control valve to increase the amount of air entering the engine to suit the changing conditions. However, when the load on the engine changes, say, when some electrical consumers or other systems are either turned on or off, the PCM adapts the signal voltage to the idle control valve to ensure that the idling speed remains stable, and at the RPM specified by the manufacturer.

B1281 Mercedes Cl 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 Cl 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 ;

Engine Control Module (ECM)
Camshaft Position Sensor harness is open or shorted
Faulty Crankshaft Position Sensor (POS)
Improper ignition timing

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 Cl Class OBD Code

B1281 Mercedes Cl Class Error Code Repair Process :

Common Causes of Mercedes Cl Class B1281 OBD2 Code

B1281 code for other Mercedes cars