What To Do When High Exhaust Temp Light Comes On

What to Do When Your High Exhaust Temp Light Comes On

As I was driving my semi-truck down the highway, I noticed a flashing high exhaust temp light. I had no idea what it meant, and I was worried that my truck was about to blow up. I pulled over to the side of the road and called a mechanic. He told me that the high exhaust temp light is a warning that the exhaust system is getting too hot. If the light stays on for too long, it can damage the engine.

Here are a few things that can cause a high exhaust temp light to come on:

Clogged Exhaust System

A clogged exhaust system can restrict the flow of exhaust gases, causing them to back up and overheat the system. This can be caused by a number of things, such as a buildup of soot, a damaged catalytic converter, or a blocked muffler.

Lean Air-Fuel Mixture

A lean air-fuel mixture means that there is too much air and not enough fuel in the combustion chamber. This can cause the engine to run hot and can lead to a high exhaust temp light.

Retarded Ignition Timing

Retarded ignition timing means that the spark plugs are firing too late, which can also cause the engine to run hot and can lead to a high exhaust temp light.

Other Problems

There are a number of other problems that can also cause a high exhaust temp light to come on, such as a faulty EGR valve, a bad O2 sensor, or a leak in the exhaust system.

What to Do If the High Exhaust Temp Light Comes On

If the high exhaust temp light comes on, there are a few things you should do:

• Pull over to the side of the road as soon as possible.
• Turn off the engine.
• Check for any obvious problems, such as a clogged exhaust pipe or a damaged catalytic converter.
• Call a mechanic.

It is important to have a mechanic diagnose and repair the problem as soon as possible. If the problem is not fixed, it could damage the engine.

Expert Advice

Here are a few tips from experts on how to prevent a high exhaust temp light from coming on:

• Make sure to maintain your vehicle’s exhaust system regularly.
• Use the correct fuel for your vehicle.
• Avoid driving in extreme heat.

By following these tips, you can help prevent a high exhaust temp light from coming on.

FAQ

Here are some frequently asked questions about high exhaust temp lights:

1. Q: What does a high exhaust temp light mean?
2. A: A high exhaust temp light means that the exhaust system is getting too hot.
3. Q: What are the causes of a high exhaust temp light?
4. A: A high exhaust temp light can be caused by a number of things, including a clogged exhaust system, a lean air-fuel mixture, retarded ignition timing, and other problems.
5. Q: What should I do if the high exhaust temp light comes on?
6. A: If the high exhaust temp light comes on, you should pull over to the side of the road as soon as possible, turn off the engine, and call a mechanic.

I hope this article has been helpful. If you have any other questions, please feel free to leave a comment below.

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