Hello! I have a 2000 Jeep Gr Cherokee Ltd w a persistent check engine light. Have tried a few things with out success. You were suggested as good w this problem. Please call me as soon as possible. I don't want to replace the Jeep. TY

I'm out till next week but the shop will open on Thursday 01/02/20 give them a call I'm sure they can help

You should call and see when they have time to look at your Jeep.

I consistently get a check engine light when I drive in 2nd gear (automatic) over 40 mph. Error Code P300. I changed spark plugs, coilover and it didn't help. It's a computer generated error. I just reset it and the light doesn't come back until I drive in 2nd gear again. Most auto parts have a engine light reader see what it says, write it down and erase the code or Try this, disconnect your battery, see if the check engine light goes away. If it's a real problem should comeback right away. My friend got his check engine light to turn off after he couldn't find a problem either.