2005 5.4 3V - multiple codes
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Senior User
Joined: Sep 2005
Posts: 237
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2005 5.4 3V - multiple codes
2005 Navi, running like el crapo with CEL. Codes:
P0300
P0305
P0306
P0307
P0308
Misfires on all bank 2 cylinders. Also throwing P2198 O2 sensor and P0175 rich on bank #2.
So, where do I start? Replace the O2 sensor, since that seems to be common part?
P0300
P0305
P0306
P0307
P0308
Misfires on all bank 2 cylinders. Also throwing P2198 O2 sensor and P0175 rich on bank #2.
So, where do I start? Replace the O2 sensor, since that seems to be common part?
Fleet Mechanic
Joined: Aug 2008
Posts: 1,446
Likes: 9
From: NE Iowa JD Country
I would start by correcting the miss fires 1st. start with fresh plugs and check the COPs...make sure everything is firing correctly. then I check the injectors....Ford did a extended warranty/customer satisfaction on them for 05', maybe your Navi will qualify?
Fleet Mechanic
Joined: Aug 2008
Posts: 1,446
Likes: 9
From: NE Iowa JD Country
Its hard to say what happened in what sequence of events? To get a better understanding of whats happening you will need a scanner capable of a "mode 6" scan...meaning it is able look at exactly how the sensors are functioning and the rate of misfires, ect. but that isn't cheep
Fleet Owner
Joined: Aug 2010
Posts: 21,253
Likes: 1,656
From: Reynoldsburg, Ohio
The misfire codes showing all four cylinders on the left/drivers side strongly suggests the wiring harness connector for that bank leading into the larger harness connected to the ECM has become an issue. I'd check that first.
The 02 sensor might be throwing a code since too much unburned fuel is being pushed into the exhaust stream due those misfires.
HTH
The 02 sensor might be throwing a code since too much unburned fuel is being pushed into the exhaust stream due those misfires.
HTH
Thread Starter
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Senior User
Joined: Sep 2005
Posts: 237
Likes: 3
The misfire codes showing all four cylinders on the left/drivers side strongly suggests the wiring harness connector for that bank leading into the larger harness connected to the ECM has become an issue. I'd check that first.
The 02 sensor might be throwing a code since too much unburned fuel is being pushed into the exhaust stream due those misfires.
HTH
The 02 sensor might be throwing a code since too much unburned fuel is being pushed into the exhaust stream due those misfires.
HTH
Thread Starter
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Senior User
Joined: Sep 2005
Posts: 237
Likes: 3
Also, no water, just driving down the freeway and it started bucking and running like crap, no power, then throwing codes.
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Fleet Owner
Joined: Aug 2010
Posts: 21,253
Likes: 1,656
From: Reynoldsburg, Ohio
Without offense to you it might be time to bring in the experts with the shop, tools and whatever else needed to diagnose and repair this in a more timely manner.
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