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Pinpoint Test A : Transmission Over Temperature Condition: Notes

Diagnostics in this service information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods for more information.

Diagnostic Overview 

Damaged temperature control valve, electrical connector or circuitry may cause this DTC to set. Refer to Electronic Engine Controls - 2.0L GTDI for schematic and connector information.

Normal Operation and Fault Conditions 

The temperature control valve directs warm engine coolant to the transmission fluid cooler/warmer mounted on the transmission during transmission warm-up and allows the coolant to bypass the warmer when the transmission fluid reaches normal operating temperature. The DTC sets when the PCM detects a transmission over temperature condition greater than 135 deg.C (275 deg.F) for at least 5 seconds. Torque converter lockup occurs earlier than expected and the PCM will turn on wrench lamp.

DTC Fault Trigger Conditions 

DTC Description Fault Trigger Conditions
P1783 Transmission Over Temperature Condition. The PCM detects a transmission over temperature condition greater than 135 deg.C (275 deg.F) for at least 5 seconds.

Possible Sources