2009 2.4L - I parked the car at a garage for about a week and feeling a little leery, I decided to remove the fuel pump relay (from inside the fuse box) and stick it in my pocket, just in case someone tries to steal it.

Well a week rolls by and go get in the car and try to crank it a few times, then remembered oh ya, I removed the relay. I stick the relay back in and now I got a CEL. The wife took it to the parts house to get the code and it had something to do with the fuel system. Well this all makes perfect sense. I did not write the code down, because it will clear it self after driving 50 miles.

I have put around 75 miles and the cel is still on. I'll go get the code and let ya know. My question is, shouldn't it reset after 50 miles? I think the relay could be plugged in 180°, could I have plugged it in wrong and it still work?

 

It will probably reset after several cold starts, but I'm just taking a wild guess without the code.

 

I don't think it can be plugged in bacwards.

The code will clear after so many starts if there is no problems.

If you don't have a scan tool you could disconnect the battery to reset it.

 

(slapping forehead) If the relay wasn't working, how would the fuel pump be pumping?

In the future, why not pull the fuse instead?

 

AHH Yup I bet you are correct, the reset is based on a number of cold starts and not number of miles. Thanks.

 

Battery lobotomy!

 

X2 on the lobotomy!!! I know they say to let the CEL clear itself but I cant stand that limp mode shift from first to second our HHR's tend to get when they think there is a problem.

 

The main reason I advise not clearing codes is that it can take weeks before all of the OBDII tests complete. If it clears itself, everything is cool including getting an emissions test.
Most codes only take 3 cold starts.

 

Hey donbrew thankfully I live in Florida where there are no emissions test so everyone drives around with missing parts, smoke blowing everywhere, and car dashboards lit up like Christmas trees!!!!! YAY FLORIDA

 

Well I broke out the Tech 2 and pulled the code. Actually to my surprise, there were three codes.
P0520 - Engine Oil Pressure (EOP) Switch Circuit
P0455 - Evaporative Emission (EVAP) System Large Leak Detected
P0230 - Fuel Pump Relay Control Circuit

I then attempted to clear all codes. Well the P0520 would not clear. The engine light is not on anymore and I now have the remote start back.

A buddy of mine told me that there was a way to clear codes without a tech 2.

• Turn the key on, then off. Open the driver door, shut it. Wait for all the lights to go off.
• Turn the key on, then off. Open the driver door, shut it. Wait for all the lights to go off.
• Turn the key on, then off. Open the driver door, shut it. Wait for all the lights to go off.
• Turn the key on, then crank it up and engine light should be gone