P1A28 Mercedes-benz Slk Class OBD Code

OBD/2 P1A28 error code description and symptoms.

The Transmission Fluid Pressure Switch allows the engine's control module (PCM) or Transmission Control Module (TCM) to use hydraulic fluid to engage the clutches in the transmission to allow for smoother shifting while driving. If the PCM or TCM detects an issue with the hydraulic clutch or the pressure switch, the PCM or TCM will set code P1A28

Gear changes are accomplished by a command from the TCM to energize the clutch actuator to release the clutch; after which various actuators inside the transmission disengage the current gear, and depending on current operating conditions, engage the next higher or lower gear ratio. All of this happens much faster than a human driver could change gears, and in most applications, gear changes are as smooth and seamless as on any fully automatic transmission.

P1A28 Mercedes-benz Slk Class Error Code Repair Process :

If your vehicle failed a P1A28 test and the P1A28 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 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 : 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-benz Slk Class P1A28 OBD2 Code

A common cause of code P1A28 is the failure of , but there are several other possible causes as well, such as ;

Continuous oil flow to the VCT piston chamber
Faulty Fuel injector
Faulty TCM or TCM programming
EVAP canister or fuel tank leaks

P1A28 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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P1A28 Mercedes-benz Slk Class OBD Code

P1A28 Mercedes-benz Slk Class Error Code Repair Process :

Common Causes of Mercedes-benz Slk Class P1A28 OBD2 Code

P1A28 code for other Mercedes-benz cars