U20E3 Mercedes Cl 600 OBD Code

OBD/2 U20E3 error code description and symptoms.

HO2S Sensor Circuit Malfunction (HO2S-11) During testing the HO2S Heaters are checked for opens/shorts and excessive current draw.
The test fails when current draw exceeds a calibrated limit and/or an open or short is detected. Short to VPWR in harness or HO2S. Water in harness connector. Open VPWR circuit. Open GND circuit. Low battery voltage. Corrosion or poor mating terminals and wiring Damaged HO2S heater. Damaged PCM.

As long as the throttle plate remains closed, the idling speed and quality is controlled by the PCM via the idle control valve, and as can be seen from the above it should be clear that idle control on a gasoline engine is a complex affair. For instance, if the engine is started in sub-zero temperatures, the PCM will command the idling control valve to allow less air to enter the engine to enrich the air/fuel mixture to create a condition which is roughly analogous to how chokes worked on carburetted engines to control idling in cold weather.

U20E3 Mercedes Cl 600 Error Code Repair Process :

The scent may U20E3 signal oil or coolant leaking from their normally closed-loop systems, or it may indicate dangerous exhaust gases invading your car's interior. Car and truck exhaust contains toxic gases such U20E3, so if the inside of your car column reach feedback potentiometer circuit open as if you were standing behind your car, get out and get it fixed. Fight the urge to take a little nap first. So sleepy. That's the carbon monoxide talking, friends. At least open a window on your way to the shop.

Common Causes of Mercedes Cl 600 U20E3 OBD2 Code

A common cause of code U20E3 is the failure of Column Reach Feedback Potentiometer Circuit Open, but there are several other possible causes as well, such as ;

Exhaust tube
Exhaust gas leaks
Intake air leaks
Faulty oil control valve (OCV)

U20E3 is a kind of Network Trouble Code

U-code indicates that engine communication errors and shows lost communication with engine parts.U-Codes are fairly straight forward, given all of the articles and technical publications that have been written regarding these problematic codes. In most cases, it just comes down to identifying the module that isn't communicating with the other modules on the CAN bus line for whatever reason.

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

About Us | Contact | Privacy

U20E3 Mercedes Cl 600 OBD Code

U20E3 Mercedes Cl 600 Error Code Repair Process :

Common Causes of Mercedes Cl 600 U20E3 OBD2 Code

U20E3 code for other Mercedes cars