U217E Mercedes Cls 250 OBD Code

OBD/2 U217E error code description and symptoms.

Catalytic converters must be warm before they can work properly. On a cold start the PCM provides a rich mixture to keep the cold engine running.
All that extra fuel goes into the catalytic converter. But the exhaust isn't very hot, because, ah, the engine is pretty cold. GM has employed several strategies to fire up the catalytic converter quicker and reduce cold start emissions. One way is to use a secondary air pump that pumps outside air directly into the catalytic converter.

Gear changes are accomplished by a command from the TCM to energize the clutch actuator to release the clutch; after which various actuators inside the transmission disengage the current gear, and depending on current operating conditions, engage the next higher or lower gear ratio. All of this happens much faster than a human driver could change gears, and in most applications, gear changes are as smooth and seamless as on any fully automatic transmission.

U217E Mercedes Cls 250 Error Code Repair Process :

The rule of U217E code when it comes to emissions-related vehicle repair is that any modification that changes the vehicle from a certified configuration to a non-certified configuration is considered tampering: this applies to both vehicle owners and repair facilities and is, therefore, a Federal offense. Replacing a catalyst with a straight pipe is one traditional example of left rear stop lamp circuit short to battery. Likewise, overriding the OBD U217E error in system through the use of high-tech defeat devices or non-certified computer chips, for example, would also be considered tampering. The OBD system may, however, be repaired back to its original certified configuration with certified performance chips or appropriate aftermarket parts.

Common Causes of Mercedes Cls 250 U217E OBD2 Code

A common cause of code U217E is the failure of Left Rear Stop lamp Circuit Short to Battery, but there are several other possible causes as well, such as ;

Dirty Oil
Damaged ECM
Faulty Air Flow Meter
Variable Camshaft Timing solenoid stuck open

U217E 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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U217E Mercedes Cls 250 OBD Code

U217E Mercedes Cls 250 Error Code Repair Process :

Common Causes of Mercedes Cls 250 U217E OBD2 Code

U217E code for other Mercedes cars