This error code is caused by the park brake pressure sensor circuit being open or short to ground. When this code is present, the PTI control unit assumes a pressure of 2100 kPa (21 bar) (305 psi) when the park is released. Park brake pressure can be viewed at PTI Address 023.

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This error code is triggered when the park brake pressure sensor indicates an invalid reading compared to other on-board pressure sensors for longer than 15 seconds.

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This error code is triggered when the park brake pressure is less than 1500 kPa (15 bar) (218 psi) for longer than 1 second while the park is not engaged.

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This error code indicates a fault in the clutch enable solenoid circuit.

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This error code is triggered by a malfunctioning clutch enable pressure sensor or clutch enable solenoid.

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This error code indicates a malfunction in the park sump block system.

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This error code indicates a fault in the Park Sump Block solenoid circuit.

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This error code is triggered when the measured direction does not match the expected direction.

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This error code indicates that the CU idler speed is low at start-up. If PTI 524233.17 is also stored, then the input shaft from the engine is not running.

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This error code is triggered when the C1 clutch fails to engage the synchronizer. It can also be generated from an engine stall.

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This error code is triggered when a differential speed is detected across clutch elements, indicating a transmission malfunction.

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