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What does a trouble code 54 mean in 1991 Chrysler lebaron 3.0L non-turbo?

A trouble code 54 in a 1991 Chrysler LeBaron 3.0L non-turbo refers to a speed sensor circuit malfunction. This sensor is crucial for the car's computer to accurately determine vehicle speed for functions like the speedometer, odometer, transmission shifting, and possibly even the fuel injection system.

The code indicates a problem within the wiring, the sensor itself, or potentially the computer's interpretation of the signal from the sensor. Troubleshooting could involve checking the wiring harness for damage or shorts, inspecting the speed sensor for proper operation (often located on the transmission), and potentially even investigating the car's computer module.

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