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 1,000 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: Multiple error codes

With that number of fault codes for different systems, it is not likely that a fuse is the problem. However, the EVAP codes can possibly be due to a bad gas cap if it not in fact loose. With the...

Q: I changed head gasket mounted everything to original spot put it on time turns over but won't fire

You can check cylinder compression as an indirect way to see if perhaps valve timing is off or if the timing belt is mispositioned. If valve timing is off, cylinder compression will of course be way out of spec. Yes,...

Q: Coolant leak??

My suggestion is to have the coolant refilled and the system pressure tested to see whether you have a leak, or the engine overheated due to a fan not turning on, or you have a blown head gasket. A...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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.