U0808 Mercedes-benz E Class OBD Code

OBD/2 U0808 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.

U0808 Mercedes-benz E Class Error Code Repair Process :

When you turn on the ignition, the Service Engine Soon or Check Engine U0808 light should flash briefly, indicating that the OBD system is ready to scan your vehicle for any malfunctions. After this brief flash, the light should stay off while you drive as long as no problems are detected. If a/c clutch circuit fault so, you'll be glad to know that your vehicle is equipped with an early warning system that could save you time, money, and fuel in addition to helping protect the a/c clutch circuit fault.

Common Causes of Mercedes-benz E Class U0808 OBD2 Code

A common cause of code U0808 is the failure of A/C Clutch Circuit Fault, but there are several other possible causes as well, such as ;

Exhaust tube
Air fuel ratio (A/F) Sensor 1 Bank 1 circuit poor electrical connection
Incorrect Positive Crankcase Ventilation (PCV) hose connection
Faulty Air fuel ratio (A/F) Sensor 1 Bank 1

U0808 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.

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U0808 Mercedes-benz E Class OBD Code

U0808 Mercedes-benz E Class Error Code Repair Process :

Common Causes of Mercedes-benz E Class U0808 OBD2 Code

U0808 code for other Mercedes-benz cars