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Old 10-08-2009, 03:40 PM   #1
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service engine light comes off and on

After having the heavy duty ignition wiring installed on my workhorse chassis the service engine light comes on and off. Has anyone had this problem and how was it corrected?

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Old 10-08-2009, 04:37 PM   #2
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Is the service engine light different from the check engine light? I read a faulty gas cap can cause the light to go on and off.

Fleetwood Providence 2008 40e
Ford F-350 4x4 Diesel 6.0L 2006
Honda CR-V 2006
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Old 10-08-2009, 06:58 PM   #3
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The check engine light comes on when the computer is storing a code. Some conditions come and go, so the computer will no longer turn on the check engine light if it does not sense the condition after normally 3 warm up cycles. It will however continue to store the code, and will turn the light back on if it senses the fault again.

I assume you do not have a code scanner, but they are available for purchase. There is a user on this site, omey, that has a very informative web site that covers some of the different types of scanners available.

Anther option is to take your rig to an Advance Auto Parts store, and I believe they will scan your computer for codes free of charge. You can then look up the code to determine the condition the computer is warning about. This will allow you to either address the issue, or it could well have been something that was done while the work was being performed, and is something that no longer applies. At any rate, they will also be able to reset the computer so it will no longer store the code if the problem has been resolved.
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Duane, Precy, 9 year old son Matt, and Abby, our American Eskimo.
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Old 10-09-2009, 02:09 AM   #4
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checker and oreily's have obd2 scanners to loan also.
01 WINNEBAGO 35U W20.8.1L SW Wa, Hi. Good Sam, SKP. AMSOIL fluids. BANKS ecm program. SCAN GAUGE II w/ Ally temp. 2 LIFELINE GPL-6CT AGM Batts on their sides. TST tptts. K&N panel air filter. AERO mufflers. TAYLOR plug wires. ULTRA POWER track bar. KONI fsd shocks, toad '14 smart car
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Old 10-09-2009, 11:35 AM   #5
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There is a difference between a Service Engine and a Check Engine light and many times a Service Engine won't set error codes. I have had engines that turned the light on when it was due an oil change.
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