P0078 Trouble Code

View P0078 obd/2 error code description and symptoms. P0078 engine photo

The input turbine speed sensor detects rotation of the input shaft of the input shaft speed sensor transmission. The computer uses that information, along with the output shaft speed sensor to determine if the transmission is operating according to plan. If the computer detects a difference between the input shaft speed , and the expected output shaft speed, it will adjust transmission pump pressure to prevent clutch disc slip. If adding pressure doesn't solve the problem, it will set a trouble code.

One example of this would be when an automatic vehicle in placed in gear. To prevent the added drag from the torque converter and transmission from reducing the idling speed, the PCM will command the idle control valve to allow more air to enter the engine, while at the same time, adjusting the injector pulse width to inject more fuel to suit the increased amount of air. Note that the idle air control valve is closed by the PCM when the throttle plate is opened to prevent excess air from entering the engine.

Difficulty Level (Expert)
Level
Repair Time (35 Min.)
Time
Cost Prediction : $ 20-50

P0078 Error Code Repair Process :

If your vehicle failed a P0078 test and the P0078 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 p0078 exhaust valve control solenoid circuit bank 1 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 p0078 exhaust valve control solenoid circuit bank 1: 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.

Wrench Tool P0078 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.

Common Causes of P0078

A common cause of code P0078 is the failure of P0078 Exhaust Valve Control Solenoid Circuit Bank 1, but there are several other possible causes as well, such as ;

P0078 code for all cars

You can view according P0078 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+P0078 Fiat Tipo +P0078 Buick Roadmaster +P0078 Ford M350 +P0078 Alfa Romeo Montreal +P0078 Mitsubishi Pajero

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

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