P0202 Fault Code exit. The Jeep ran fine for 3 hours following the FI replacement but now is running rough. I compared the old injectors and it appears one is missing the end seal and may have fallen into the #2 injector port on the engine. How do I get it out? what should I do to fix it?
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2004 Jeep Liberty Question: #2 Fuel Injector (FI) O-ring fell into the engine. How do I get it out?
Answer #1pushrod December 12, 2013, 03:04Master
If the old o-ring were still in the head, the new injector would not be seated properly and should have been running rough from the start after replacment. You will have to remove the injector again to see IF the old o-ring is in there! P0202 is an injector circuit fault. Do you have any other codes now? If so what are these codes?
Just for the heck of it, what engine, 2.4 or 3.7??
Replycu8256, December 12, 2013, 07:48Rookie
I have a 3.7ltr. There are/were no other codes, just P0202. I consulted with a mechanic up the road and he agrees that, if the seal/o-ring fell into the Fuel Injector (FI) port it is long gone out the exhaust. He called a friend with a gauge to determine if the #2 injector is getting proper electrical feed and that turned out positive. The only other option I had was to pull the new FI, and replace it with one of the old ones. I cleaned the old one as best I could, transferred the new O-rings from the new FI to the Old FI and installed the old FI. I cleared the code and started the engine. All seems to be okay for the moment, and will continue to monitor. BLUF: I guess the New FI was faulty.
Replypushrod, December 12, 2013, 12:17Master
Actually the o-ring is bigger than the port and most likely will stay there if it is intact! However that would not throw a P0202 code, it would set a P0302 misfire code most likely. That is why I ask questions like; are there any other codes.
Replycu8256, December 12, 2013, 13:34Rookie
There was only the P0202 code. Maybe I didn't explain it properly regarding the seal/o-ring. At the very bottom of the injector is a black hard plastic just below the O-ring which I found to be missing. I naturally assumed it fell into the car since I don't have any other explanation for it missing. Just the same I cleaned one of the old injectors and replaced it for the new one. The vehicle is running nice and no more fault codes. I will monitor it and let you know if there are any other issues. Thanks so much for talking to me. Just having someone to talk to was a true moral boost in keeping my sanity. I am retired military living in Serbia so part are hard to come by and there is a language barrier as well. Best regards.
Replypushrod, December 12, 2013, 13:41Master
You bet!!! Thanks for serving!!! Hope it keeps on running ok.