U229A Mercedes Sl 300 OBD Code

OBD/2 U229A 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.

U229A Mercedes Sl 300 Error Code Repair Process :

The rule of U229A 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 speed wheel sensor rf input short circuit to battery. Likewise, overriding the OBD U229A 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 Sl 300 U229A OBD2 Code

A common cause of code U229A is the failure of Speed Wheel Sensor RF Input Short Circuit To Battery, but there are several other possible causes as well, such as ;

Engine Control Module (ECM)
Air fuel ratio (A/F) Sensor 1 Bank 1 harness is open or shorted
Damaged camshaft position (CMP) sensor
Faulty variable valve timing (VVT)

U229A 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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U229A Mercedes Sl 300 OBD Code

U229A Mercedes Sl 300 Error Code Repair Process :

Common Causes of Mercedes Sl 300 U229A OBD2 Code

U229A code for other Mercedes cars