P206A Mercedes B Class OBD Code

OBD/2 P206A 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.

Circuit High Input codes like P206A 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.

P206A Mercedes B Class Error Code Repair Process :

If your p206a reductant quality sensor circuit check engine light is illuminated, it's best to take it in for diagnostic testing, which can feel like a hassle. Because while the lights vary in appearance from vehicle to vehicle, all have the same basic meaning: There's a problem with the car's emissions system. The on-board diagnostics system P206A and engine control unit are in charge of monitoring a bunch of different p206a reductant quality sensor circuit, and if they get a reading that's a little out of whack, up pops the check engine light.

Common Causes of Mercedes B Class P206A OBD2 Code

A common cause of code P206A is the failure of P206A Reductant Quality Sensor Circuit, but there are several other possible causes as well, such as ;

Exhaust tube
1Camshaft Position Sensor circuit poor electrical connection
Incorrect fuel filler cap used
Variable Camshaft Timing (VCT) position circuit poor electrical connection

P206A 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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P206A Mercedes B Class OBD Code

P206A Mercedes B Class Error Code Repair Process :

Common Causes of Mercedes B Class P206A OBD2 Code

P206A code for other Mercedes cars