Diagnostic Aids

Check for poor connections at pass-through connector. A faulty transmission range pressure switch assembly may set Code 80.

1. Checks for out-of-calibration sensor or shorted circuit.
2. Simulates Code 59.

See Code 59 chart to check transmission temperature sensor temperature-to-resistance values. Also, check transmission fluid level.

Fig 1: Code 80 - Transmission Control Flowchart