P3347 Mercedes R Class OBD Code

OBD/2 P3347 error code description and symptoms.

Mass Air Flow (MAF) Sensor Intermittent The MAF sensor circuit is monitored by the PCM for sudden voltage (or air flow) input change through the comprehensive component monitor (CCM). If during the last 40 warm-up cycles in key ON engine running the PCM detects a voltage (or air flow) change beyond the minimum or maximum calibrated limit, a continuous memory diagnostic trouble code (DTC) is stored.

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.

P3347 Mercedes R Class Error Code Repair Process :

The rule of P3347 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 aux heater coolant pump circuit open. Likewise, overriding the OBD P3347 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 R Class P3347 OBD2 Code

A common cause of code P3347 is the failure of Aux Heater Coolant Pump Circuit Open, but there are several other possible causes as well, such as ;

Damaged camshaft position (CMP) sensor
Continuous oil flow to the VCT piston chamber
Failures of clutch motion/travel sensors.
Variable Valve Timing (VVT) circuit is open or shorted

P3347 is a kind of Powertrain Trouble Code

Powertrain of a modern automobile, comprising engine (with exhaust system), transmission, drive shaft, suspension and the wheels. In a motor vehicle, the term powertrain or powerplant describes the main components that generate power and deliver it to the road surface, water, or air.

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

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P3347 Mercedes R Class OBD Code

P3347 Mercedes R Class Error Code Repair Process :

Common Causes of Mercedes R Class P3347 OBD2 Code

P3347 code for other Mercedes cars