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This creates a signal which is misinterpreted by the engine control software, causing a high idle speed condition.

Engine And Engine Cooling — Engine — Diesel

Summary
Vehicle description: Light duty pickup trucks equipped with 5.9L - 24 valve diesel engine. An intermittent high engine idle condition can occur due to a malfunction of the vehicle speed sensor.
Actions
Dealers will replace the engine controller software to correct erroneous speed sensor signals.
Documents (1)

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Date Announced
SEP 08, 1998
Vehicles Affected
30,747
NHTSA Campaign #
98V209000
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