Fault Code 15


Description:  No speed/distance sensor signal
Power loss light:  Off
Limp-in mode:  None

Possible Causes

Bad connector or wiring - Check the connector at the sensor and on the wiring harness near the fuel rail for corroded contacts or broken or melted wires.  Check the wiring for continuity.

Speed/distance sensor failure - If you have a 1992 or earlier transmission, these sensors are prone to failure.  See the Hall Effect Speed/Distance Sensor Conversion page to see if you can repair this problem once and for all.  The sensor is located on the transmission on top of the long casting where the right axle connects.

Diagnostic Method

Trigger Parameters

- Throttle has been closed for 7 seconds
- Engine speed 768 rpm above target idle speed
- Speed sensor not producing a signal

Results If Component Fails

Fault code 15 is stored, but there is no "limp-in" mode for this fault code and the power loss light does not turn on. Any pulses from the sensor are considered valid.
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This page is maintained by Russell W. Knize and was last updated 08/28/98. Comments? Questions? Send email.

Copyright © 1996-2003 Russ W. Knize