DF092 Mercedes B Class OBD Code

OBD/2 DF092 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.

Circuit High Input codes like DF092 are mostly caused by defective alternators that develop excessive voltages, although there may be other causes as well, such as short circuits that 'leak' current into a particular system from other, unrelated systems that work on higher voltages. Note that in the case of short circuits that leak power into a control circuit, there is likely to be other, seemingly unrelated trouble codes present along with the code(s) being investigated. Diagnosing a 'high input' code will always involve a thorough testing of the charging system as a first step, followed by measures to isolate the system from all other possible sources of power during resistance, continuity, and reference voltage tests.

DF092 Mercedes B Class Error Code Repair Process :

If your vehicle failed a DF092 test and the DF092 Check Engine Light is NOT on, chances are you have a problem with the OBDII system, a burned out MIL lamp, or a faulty catalytic converter. The converter is essentially an afterburner that cleans up the exhaust after it exits the engine. The OBDII system uses yaw rate sensor circuit open a ownstream oxygen sensor to monitor the efficiency of the converter, and it should detect a drop in converter efficiency if the converter has been contaminated or is failing (ignition misfiring, leaky exhaust valves, and oil burning can all damage the converter). What you want to look yaw rate sensor circuit open: Any conditions that might cause ignition misfire, an overly rich or lean fuel condition, or loss of compression. Use your OBD Express DIY to look at the oxygen sensor outputs, coolant temperature, airflow, calculated engine load, and inlet air temperature.

Common Causes of Mercedes B Class DF092 OBD2 Code

A common cause of code DF092 is the failure of Yaw Rate Sensor Circuit Open, but there are several other possible causes as well, such as ;

Damaged camshaft position (CMP) sensor
Faulty Crankshaft Position Sensor (POS)
Exhaust gas leaks
Three way catalyst converter Bank 1

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

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DF092 Mercedes B Class OBD Code

DF092 Mercedes B Class Error Code Repair Process :

Common Causes of Mercedes B Class DF092 OBD2 Code

DF092 code for other Mercedes cars