Does anyone on here have knowledge about freeze frame data and odb2 codes that could help me diagnose a problem with my 1997 Ranger 4.0l.
ODB2 codes that come up
P1443- purge control solenoid or purge control valve fault
P0401- exhaust gas recirculation flow insufficiant detected
P0402 -exhaust gas recirculation flow excessive flow detected
P0171- system too lean (bank 1)
P0172- system too rich (bank 1)
P0174- system too lean (bank 2)

Freeze Frame data
ETC 174
SHRTFT1(%) -19.5
LONGFT1(%) -25.0
SHRTFT2(%) -0.8
LONGFT2(%) 5.5
RPM (/min) 1028
VSS (mph) 0

Any help would be appreciated. I am having a lot of hesitation picking up speed and intermittant hard shifts. Just basically running like crap. thanks in advance.

The OBDII doesn't work with model year 97' + 98' Rangers. It is a known issue and there are threads on here and elsewhere.

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2 0 0 8 R a n g e r 3.0 X L T 4 door

What do you mean it doesn't work?

A link to a thread in this site is below. I found it easily with the search button on the top right. Anyway, the ports in the 97', 98' Rangers are set-up differently, and don't report all the info. correctly.

OBDII doesn't give MPH info

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2 0 0 8 R a n g e r 3.0 X L T 4 door

What ports are you talking about? If you are talking about the connector under the dash they are identical from model year 1996 to current for basic obd2 functionality as they are required to all be wired the same. After that the manufacturer can use the rest of the unused pins on the connector how they want to enable their enhanced OBD functions. Usually if a PID does not display properly it is a software error with the scan tool not reading the data correctly. I use various scan tools every day and when I have the problem of a PID not working propperly that I needd to see I hook up a different scanner and most times it works fine.

As to not working on Rangers I have yet to find a scanner that does not read the MPH PID correctly. Of couse that may be because I use either an OTC Genisys, Launch X431 Diagun, or the Ford IDS tool.

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What datastream items can you read and what scanner/code reader are you using?

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1999 Ford Ranger XLT, 4 dr supercab, 5-spd manual, 4.0 OHV, 4x4, FX4 Shifter, 2004 Ranger front end conversion, 2009 Ranger tail lights, Volant cool air intake.

Misfire bank 2 (bad injector) and your purg solinoid is sticking open causing your engine to pull fuel vapor from the carbon canister all the time, thats what I can think of with the data supplied. Work on dpfe code after fixing the rich lean codes.

Why? The computer adjusts fuel trim (short term/long term) +- based on what it views from the o2 sensor. When you have a misfire the o2 sensor sees more oxygen because thats what it senses. With a stuck open purg valve there can be enough fuel provided to the misfireing cylinder to make it so the computer can adjust it to a good fuel trim because there is fuel burnng in the otherwise what should be dead hole. Now why is the other bank so rich... easy the stuck purg solinoid is passing so much fuel that the computer cant adjust that bank down. verify what I said and then replace the faulty components.

you had a lot of problems pop up at once.

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97 extended cab 4.0 5 speed 4x4 31 M/T warn manual lockers where it matters. Fancy black euro tail lights and a nice stereo for fun.

I'm going out on a limb and saying your dpfe codes are a bad dpfe sensor. thats a guess. fix the other stuff first then you can mess with the dpfe.

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97 extended cab 4.0 5 speed 4x4 31 M/T warn manual lockers where it matters. Fancy black euro tail lights and a nice stereo for fun.

Check all your vacuum hoses and lines.

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1999 Ford Ranger XLT, 4 dr supercab, 5-spd manual, 4.0 OHV, 4x4, FX4 Shifter, 2004 Ranger front end conversion, 2009 Ranger tail lights, Volant cool air intake.

I have replaced the purge valve solenoid the check engine light has come back on i will run my scanner tonight to see what codes came up. O it is a cheap scanner from harbor frieght but has always worked very well for me.

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Chris Jackson
1997 Ford Ranger Extended Cab
Former owner of a 1993 Ranger Splash Black

I changed the canister purge valve solenoid. I erased the codes. After it ran through all the monitors the CEL is back. It now shows P1443, P0172, P0171, P0174 and P0401. I will have to see what I can do. Would running Seafoam maybe clean out the injectors?? I have heard a lot of good things about it.

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Chris Jackson
1997 Ford Ranger Extended Cab
Former owner of a 1993 Ranger Splash Black

Replaced dpfe and maf tested the coil and wires and replaced spark plugs and still get p1443 p0171 p0172 p0174 and now get a p0301 code. And it runs like crap. Really jumpy. Weird thing is if i disconnect the battery and reconnect it it runs like a champ till the check engine light comes on and performance quickly fades after that. Any input would be helpful.

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Chris Jackson
1997 Ford Ranger Extended Cab
Former owner of a 1993 Ranger Splash Black

P1443 = possible purge flow sensor.

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P0171, P0172 = possible intake plenum gasket(s) leaking. I would address these and the P1443 code first and then see if the others come back.

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1999 Ford Ranger XLT, 4 dr supercab, 5-spd manual, 4.0 OHV, 4x4, FX4 Shifter, 2004 Ranger front end conversion, 2009 Ranger tail lights, Volant cool air intake.