2006 Expedition 5 Error Codes
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2006 Expedition 5 Error Codes
Important to note that the issues started when too much oil was added to the motor- almost a full quart. Check engine light came on 1 mile after the oil was added. I drained it after 30 miles (had to drive home).
Error codes were PO174, PO171, P2197, PO304 and PO308
I drained & replaced oil & filter, and replaced all plugs. Did not replace COP's, or O2 Sensors, or MAF.
Car started, ran like 3 plugs had failed and won't start again.
Any advice on how to diagnose this or bring this back to life is appreciated!!
Error codes were PO174, PO171, P2197, PO304 and PO308
I drained & replaced oil & filter, and replaced all plugs. Did not replace COP's, or O2 Sensors, or MAF.
Car started, ran like 3 plugs had failed and won't start again.
Any advice on how to diagnose this or bring this back to life is appreciated!!
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P0171 and P0174 = System too lean bank 1 and 2.
P0304 and P0308 = Misfire detected on cylinder 4 and 8 (this does not mean there's no misfires on other cylinders though)
P2197 = o2 sensor stuck lean (bank 2, upstream sensor)
I'd say this points to an issue with the O2 sensor, with misfires it should read rich, but it reads lean. The misfires and lean codes are most likely related to this. I'd say at least replace the o2 on bank 2 (drivers side), but if it was my truck I'd do both upstream sensors. They cost about 20 bucks, so not a big deal.
And get some CRC MAF cleaner and clean your MAF while you're at it, it should be done once in a while so if you've never done it then it's time to do it.
Just spray it and let it air dry, DO NOT touch the sensor element with anything other than spraying it! (fine wires inside the opening)
P0304 and P0308 = Misfire detected on cylinder 4 and 8 (this does not mean there's no misfires on other cylinders though)
P2197 = o2 sensor stuck lean (bank 2, upstream sensor)
I'd say this points to an issue with the O2 sensor, with misfires it should read rich, but it reads lean. The misfires and lean codes are most likely related to this. I'd say at least replace the o2 on bank 2 (drivers side), but if it was my truck I'd do both upstream sensors. They cost about 20 bucks, so not a big deal.
And get some CRC MAF cleaner and clean your MAF while you're at it, it should be done once in a while so if you've never done it then it's time to do it.
Just spray it and let it air dry, DO NOT touch the sensor element with anything other than spraying it! (fine wires inside the opening)
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Joined: Jan 2001
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From: Central NYS
Not to be a nit-picker, but I see this quite often.
When there are misfires, I agree it would read rich if it had 'fuel' sensors. But it has 'oxygen' sensors, so the unused oxygen would cause it to read lean. Especially if the PCM shuts down the injector of the misfiring cylinder.
Anyhow, carry on.
When there are misfires, I agree it would read rich if it had 'fuel' sensors. But it has 'oxygen' sensors, so the unused oxygen would cause it to read lean. Especially if the PCM shuts down the injector of the misfiring cylinder.
Anyhow, carry on.
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Well my weekend will include new COP's, fuel filter, and O2 sensors, MAF and considering a fuel pump for kicks....
I cleaned the MAF with the correct cleaner, and still the motor won't start... seem's like a fuel issue- So I bought the vehicle used, I might as well add some new parts that tend to go out anyway!!
Really appreciate the feedback!
I cleaned the MAF with the correct cleaner, and still the motor won't start... seem's like a fuel issue- So I bought the vehicle used, I might as well add some new parts that tend to go out anyway!!
Really appreciate the feedback!
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Joined: Dec 2014
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The fuel pump rarely go bad on these trucks, the usual culprit is the Fuel Pump Driver Module that corrodes and shorts out due to dissimilar metals, aluminum mounted on steel. You can find it behind the rear wheel on the frame on drivers side. Check the following video for reference on how to replace it:
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