Check engine light and low coolant pressure light is on?

Hi,

There is a chance the head gasket has failed. Do me a favor. Take a look through this link and let me know if it mirrors what you are seeing.

https://www.2carpros.com/articles/head-gasket-blown-test

Also, since the check engine light is on, I strongly have the computer scanned for diagnostic trouble codes. Most parts stores will do it free of charge. If there are codes, and there should be with the check engine light on, let me know what they are.

Let me know what you find or if you have other questions.

Take care,

Joe

Hi,

The P0001 is a fuel volume pressure sensor, which isn't relevant on this vehicle. The fuel pressure regulator on your vehicle is vacuum operated.

Since we have that code, do me a favor and locate the regulator on the fuel rail. There will be a vacuum hose going to it (see pic 1). Remove the vacuum hose and check to see if there is any evidence of fuel in it. Also, for a test only, start the engine and confirm there is a vacuum to that hose.

If there is a vacuum and no evidence of fuel in the vacuum hose, we need to check the fuel pressure to see if it is high, which would indicate the regulator is bad.

Here is a link that explains how that is done:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

You will need a fuel pressure gauge, but most parts stores will lend one to you.

Next, the P0306 indicates a misfire on cylinder 6. That can be caused by several things. For example, the vehicle may be in need of a tune-up. Or the fuel pressure could be causing it.

What I would suggest is this. Since the misfire could be the result of fuel pressure, start there. The P0306 could be a result rather than the issue.

I realize this sounds like a lot. However, if you have questions, I will do my best to help from here, so don't worry about answering questions.

Take care and let me know what you find.

Joe