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DTC - Diagnostic Trouble Codes information

P0783

Powertrain Codes

P0783 - JEEP - 3-4 Shift Malfunction

Symptoms

- Engine Light ON (or Service Engine Soon Warning Light) - Transmission may not shift to the next gear.

Possible Causes

- Low transmission fluid level - Dirty transmission fluid - Faulty shifting solenoid valve - Shifting solenoid valve harness or connectors - Shifting solenoid valve circuit is open or shorted

When Detected

The P0783 code is detected when actual gear position and the commanded gear position are different

Description

This P0783 code indicates that the 3-4 shift valve in the valve body is locked in the direction of the spring compression. The Transmission Control Module (TCM) controls the gearshifts by turning the shift solenoid valves "ON/OFF" and switching oil pressure to the valves in the valve body. The TCM calculates the "actual" transmission gear by comparing the signals from the input speed sensor and the output speed sensor.