Skip the auto shop - Our mechanics make house calls

Q: Service engine soon. Light not blinking. Diagnostics engine head radiator hot. I see no problems no overheating?

asked by on

Serpentine belt replaced. Mechanic replaced it and checked all the fluids and tested. I drove off and the check engine light came on solid red light on blinking. Drove into Advanced Auto diagnostics was overheated radiator and head. When I checked I found no problems overheating and the truck was running just fine tested it for about 30-40 miles. Do I need to take it back to the mechanic?

My car has 88000 miles.
My car has an automatic transmission.

Hello. Thank you for writing in. It would be beneficial to have the diagnostic codes that were pulled from the scan. Have you checked the level of the coolant? You should start there. Make sure that the thermostat is completely submerged as it will not give you an accurate reading if the coolant level is low. It is possible for the engine to consume the coolant and you would not see any signs of a leak. You may see white smoke or steam if this is the case. Also make sure that the radiator cap is on tightly and securely. If the belt is slipping on the water pump, then there will be poor circulation of coolant and overheating could be an issue. Due to the recent belt work, and the role the belts play in the cooling system, double check that system as well. Check the belt for excess play with the vehicle off, and then turn on the vehicle and observe the belts. You should be able to reset the codes and see if it triggers again. Make sure no sensors have been knocked loose in the process. Check the listed components and take further diagnosis from there.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Service engine soon. Light not blinking. Diagnostics engine head radiator hot. I see no problems no overheating?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Brake line broke

In theory, you could run the brake line up and over rather than under and around the motor, however depending on the tightness of the line you may run into pressurizing problems with the fluid. You will need to be...

Q: Transmission swap

Hi there. The transmission would likely require some fabrication, with new flywheel settings and some electrical changes; but should physically fit in the truck.

Q: Truck is overheating - 1992 Chevrolet C1500

There are a few things to check over. The water pump produces flow. To check this remove one of the heater hoses (small diameter) going to the heater core. Locate the hose end to a container to check flow of...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.