1999 Jeep Grand Cherokee Output Speed Sensor Fix

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SWWADMAN
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1999 Jeep Grand Cherokee V8 5.9L 101,500 miles. Check engine light recently came on. 2 different OBD units said it was due to Output Speed Sensor (code P0720.) Although I felt a very slight delay or skip when the check engine light came on, the car is driving nromally. Is this problem critical or can I get away without fixing it? If I should fix it can I wait until I take the car in for 105k service or should I get it fixed right away?

Thanks for your help,
Scott
Feb 18, 2006 at 5:20 AM
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BLUELIGHTNIN6
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When a sensor begine to fail the computer can realize something is wrong fairly quickly. Normally when a faulty sensor is causing an engine code to appear, the vehicle may still run normal for many more miles before the sensor actually fails. However, I suggest replacing the sensor as soon as possible so the sensor will not fail on you at a very inconvenient time.






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Mar 26, 2009 at 7:04 PM
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Suggested Repair

Replace the output speed sensor as soon as possible rather than waiting for the next service, so it does not fail at an inconvenient time.

Conversation Summary

The owner of a 1999 Jeep Grand Cherokee with about 101,500 miles reported a check engine light and code P0720 for the output speed sensor. The vehicle still drives mostly normally, with only a slight delay or skip when the light came on, and the owner asked whether the repair could wait until the 105,000-mile service. The expert said a failing sensor can set a code while the vehicle continues to run normally for many miles, but recommended replacing the sensor soon.

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