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Hello guys im having these two engine codes P1151 and P0153 both are related to the upstream oxygen sensor this problem occured when i was replacing right valve cover (but it coud be coincidence that it failed now), however i already replaced that o2 sensor that code tells drivers side upstream and CEL didnt delete, its really weird problem because when starting truck first thing in the morning it will run great for long period of the time to, but as soon when i turn the engine off and let it cool a little bit and restart it then CEL comes up engine will missfire,hesitation under acceleration on rpms lower than 1800,idle rpm is a little higher to but when i try deleting code whit obd reader that symptoms go more mild.
Any ideas what coud this be? I also tried cleaning MAF, spraying starter fluid in the aroud engine if there is any vacuum leak, exhaust manifold doesnt leak on this side so what else to check?
Coud it be faulty wiring to the o2 sensor heater that i damaged it when i was removing valve cover and those wires are around it?
Coud it be PCV valve that its faulty since i was removing it but i assume that both banks woud be fault then?
Coud it be faulty injectors but i assume that then CEL code woud pop up as missfire and CEL woud be present all the time and not only when restarting warmed engine?
when starting truck first thing in the morning it will run great for long period of the time to, but as soon when i turn the engine off and let it cool a little bit and restart it then CEL comes up engine will missfire,
i did yea but i just described how truck feels when its running, but obd scanner doesnt show any missfire code only those two i've posted, woudnt computer detect a missfire code instead lean code if there was faulty sparkplug/ignition coil or maybe injector im just asking?
i did yea but i just described how truck feels when its running, but obd scanner doesnt show any missfire code only those two i've posted, woudnt computer detect a missfire code instead lean code if there was faulty sparkplug/ignition coil or maybe injector im just asking?
You can't rely on the computer to tell you everything. Some things you just feel eg: misfiring engine/running rough. 1st thing you need to do is a compression test on the engine, once those numbers are recorded and depending on the readings decides which way to go next.
You can't rely on the computer to tell you everything. Some things you just feel eg: misfiring engine/running rough. 1st thing you need to do is a compression test on the engine, once those numbers are recorded and depending on the readings decides which way to go next.
i understand that but why woud you meassure compression on an engine that runs good until you turn it off, let it cool a bit and when restarting problem begins thats most likely not a compression problem.
i understand that but why woud you meassure compression on an engine that runs good until you turn it off, let it cool a bit and when restarting problem begins thats most likely not a compression problem.
Compression tests will tell the tale of the base engine. If the base engine isn't right, no amount of electrical/electronic work is going to help. They taught us that in mechanics school 43 years ago when I went. Ford refreshed that procedure in my memory when I went to school/work for them 31 years ago.
The symptoms sound a lot like the overheating injector problem that old Datsuns and Jeeps have. Does it clear up after about 15 seconds and run normally again? Those shorty headers might be the cause. Doesn't explain the code but fits the physical description.
The code is not an O2 sensor heater code. There's a specific code for that, I think.
Most threads are like conversations. You have to respond to what was last said to keep the conversation going. Almost nobody gets the right answer on the first reply. Good luck.
Most threads are like conversations. You have to respond to what was last said to keep the conversation going. Almost nobody gets the right answer on the first reply. Good luck.
Yea sorry for late replys i was just bussy, firstly yea i misstiped code in the title i meant p0153, as you said for overheating fuel injectors do you think if removing them so they coud be cleaned in the ultrasonic cleaner help whit that? Maybe some of them is a little bit clogged which theoretically coud make them overheat because they have to work more?
Im somehow the most convinced that there is faulty wiring to the o2 sensor, do you know how to meassure wiring harness on truck side? So there are 4 wires 2 are for the heater so how do you meassure that? the other 2 ones are i assume just ground and + ?
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