P0728 Code - Engine Speed Input Circuit Intermittent

What does P0728 Mean?

The PCM has received an engine speed signal from the engine (turbine) speed input sensor that is either irrational, erratic, or in some way incorrect. Without a usable input speed signal the transmission cannot provide a proper shift strategy.

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What are the common causes of P0728 ?

Most of the time, this code is stored when the engine input speed sensor, or the transmission output speed sensor, is faulty.
Other causes may include:

• Shorted, damaged, or open electrical components within the engine speed circuit
• Faulty shift solenoid
• Defective engine sensors, such as the engine temperature sensor, or other drivability sensors
• Defective crankshaft or camshaft position sensor
• Defective electrical components within the crankshaft sensor circuit
• Restricted transmission fluid flow due to contaminated fluid
• Defective valve body

How do you troubleshoot P0728 ?

Deactivation of cylinders is achieved by releasing a synchroniser pin that normally interlocks the cam follower and rocker arms. P0728 code resolves the synchroniser pin is released using hydraulic pressure which is controlled by a dedicated solenoid.

Searches related to P0728 Code - Engine Speed Input Circuit Intermittent

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