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Yellow CEL and Red CEL lights
I have often wondered if there is a published list of what conditions drive a Yellow CEL and a Red CEL on the dash. I was recently reading the DDEC V operating manual and ran across this information in that document. Unfortunately, it is not consolidated, but I thought I would paraphrase here for the group. This post is not all encompassing, but intended to serve as a guide for inquiring minds that want to know…….
For those of you who haven’t experience this, the Yellow CEL light is driven by a condition or set of conditions that should be looked at when possible, but theoretically will not cause certain engine damage. The Red CEL light is driven by a condition or set of conditions which will certainly cause engine damage and will initiate one of two engine shut down conditions…..”Aux. Shutdown #1″ and “Aux. Shutdown #2” in DD DDEC V terms.
It is typical for a Red CEL light to give you a short period of time (seconds not minutes) to get the coach under control and pulled over to a safe location before the engine is automatically shutdown. You can extend this time period before the engine automatically shuts down by pressing the override switch on the dash (usually left of the steering wheel).
If you aren’t familiar with this switch, you should take the time to locate it and become familiar with it’s operation. I can give first-hand experience how disorienting a Red CEL can be. I had owned my first Prevost about a month when I got a Red CEL while on a busy highway in Nashville. Luckily a friend had briefed me on its operation and reflexes kicked-in. (I guess I’m trainable at least!)
For Yellow CEL’s I can’t help much here as the list is multiple pages long for conditions that will throw that error. Fortunately, Red CEL’s have a much shorter list as summarized below.
+ Coolant Level Low
+ Intake Manifold Temperature High
+ Coolant Temperature High
+ Air Inlet Temperature High
+ Oil Temperature High
+ Oil Pressure Low
+ Turbo Compressor Out Temperature High
Hope this post is educational and helps those in search of information on Yellow and Red CEL’s. The complete list of DDEC V Yellow and Red codes can be found in the “Series 60 EGR Technician’s Manual”. 135 pages of technical goodness, loaded with tons of information about DDEC, EGR and other important topics.
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1 Reply
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To the best of my knowledge only 3 SEL lights on early vintage detroit powered coaches apply. This includes the 2007, These three will cause a shut down: Low coolant, low oil pressure or high coolant temp. On later model coaches a high oil temp may cause a shut down. I am not aware of those for a Volvo so that list may apply to a Volvo.
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