P0071 Mercedes-benz Sl Class OBD Code

OBD/2 P0071 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.

Circuit High Input codes like P0071 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.

P0071 Mercedes-benz Sl Class Error Code Repair Process :

If your p0071 ambient air temperature sensor range/performance 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 P0071 and engine control unit are in charge of monitoring a bunch of different p0071 ambient air temperature sensor range/performance, and if they get a reading that's a little out of whack, up pops the check engine light.

Common Causes of Mercedes-benz Sl Class P0071 OBD2 Code

A common cause of code P0071 is the failure of P0071 Ambient Air Temperature Sensor Range/Performance, but there are several other possible causes as well, such as ;

Dirty Oil
Faulty starter motor
Intake Valve Timing Control Solenoid Valve circuit poor electrical connection
Air fuel ratio (A/F) Sensor 1 Bank 1 circuit poor electrical connection

P0071 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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P0071 Mercedes-benz Sl Class OBD Code

P0071 Mercedes-benz Sl Class Error Code Repair Process :

Common Causes of Mercedes-benz Sl Class P0071 OBD2 Code

P0071 code for other Mercedes-benz cars