I recently had some issues with my 2006 jeep grand cherokee. It was originally giving me a P0300 code. I changed the spark plugs and it still had the code. I didn't drive it for a week and borrowed a car to get to work. I drove it yesterday for the first time and it sputtered a little when I started it but after it ran for a little bit it was fine and seemed to run better once I filled it with gas. The engine light didn't come on at all yesterday or this morning on my way to work. I left today at lunch time to run an errand and the engine light came on so I used my code reader to determine it was P0152 and P0174 codes. I know that 152 is bank 2 sensor 1 O2 sensor and 174 means system is lean. I think the 2 codes together point to one problem but I'm not sure what that is. Why did my P0300 code disappear and why is there now a P0152/P0174 code combo? Was this problem the real reason I originally got the P0300 misfire code in the first place? Is this something I can diagnose easily and can repair myself?
Checkc your fuel pressure with a gauge auto parts rent them
September, 18, 2013 AT 12:47 PM
It didn't give any codes at all yesterday on the way home from work and I live an hour away from work. This morning, however, when I started it up to come to work the engine light came back on and it was only the P0152 code. There was no P0174 code this time. Should I still check the fuel pressure or do you think it's something else? What fuel pressure should I look for if I still need to check and what is my course of action after that?
September, 18, 2013 AT 1:11 PM
Yo ae supposed to have the scan tool activate the pump but turn the key on and see if it gets up to pressure an auto parts scan tool can't do that so a pro will but it should have 59 psi +-5 key on engine off the p0152 code will have to be looked at by a pro because it may be a short. You might get eh fp reading without the scan tool.