Skip the auto shop - Our mechanics make house calls

Q: Coolant leak codes

asked by on

My car has fewer than 98000 on it and it runs really good and it has great on mileage. I drive a 37 mile stop and go commute every day. It has a whole lot of power and idles smooth. But lately I’ve been getting a PO2187 code, but I can’t find a vac leak. So I decided to clear the code. But then I got more codes 300, 301 and 302 about misfiring which I never noticed. I looked under the hood and saw the coolant level was low, and I filled it. When I got home today and went to check my coolant level again, it was laying on top of my new upper motor mount and some was on top of the reservoir and down below the air inlet hose for the turbo I think. It’s a big thick hose. There is no pressure in the expansion tank because the cap is a 21 PSI which doesn’t like pressure. And my temperature needle is at half way and never passes that mid point. With all of these symptoms I guess this could be a leak in the head gasket. But I think no because there is no water in the oil and the car runs fine. What do you think is wrong and how can I fix this?

The code P2187 indicates a lean running situation at idle. More parameters will need to be checked to get to the bottom of this issue. Sometimes false reading from a malfunctioning mass air flow sensor may mess with the vehicle’s engine control unit and cause a light.

As for the leak, you will probably want to get this checked soon to prevent any worse problems from occurring. If you are having trouble pinpointing the issues, consider having a qualified professional, such as one from YourMechanic, inspect the Check Engine Light and detect any leaks that may be present for you.

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. Coolant leak codes

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: My car had a rough idle, and if I sit at a red light or let the car run in idle for a few minutes my check engine light starts to

A dead misfire on a single cylinder may be deeper than just a spark plug. If the compression for that cylinder is very low, the cylinder cannot fire. Low compression would be caused by worn piston rings. Also, if the...

Q: I need brakes on my 2014 Volvo s60 t5

Hi there. Thanks for contacting YourMechanic.com. In order to provide you with an estimate for replacing your brakes on the Volvo S60, we'll need to gather some additional information about your location and the car. To begin this process, please...

Q: Exhaust blowing gray blue smoke when accelerating

Hello. If this occurred right after the oil was replaced, then you need to check the oil level. The symptoms you are having are consistent with someone putting way too much oil in the engine. If this was the case,...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
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.