OBDII PID Parameter "normal" ranges

[Pierre's Porsche]

I just bought a 2000 Boxster (base), I've hooked it up to my OBD test unit which allows real time veiwing of various operating parameters. Does anyone have a reference were i could look up normal value ranges for my car?

[JFP in PA]

You can probably find most of them in either the OEM OBD II diagnsotics manual, or in the OEM service manual set.

[logray]

Someone just asked for this the other day.

Here you go.

[Pierre's Porsche]

Thanks for the replies guys. The link was helpful. I assume the values are acceptable ranges regardless of type of tester..? I'm using and Actron, and don't find acceptable ranges, for specific vehicles on their website.

[logray]

Yes, the data I provided is for your car specifically.

So however you are reading that data.the numbers should be according to those set-points.

Unfortunately set-points for anything above idle is sporadic at best.

I wouldn't get too hung up on numbers though... if the car runs fine and there are no CEL's, just drive it and enjoy!

[JFP in PA]

Thanks for the replies guys. The link was helpful. I assume the values are acceptable ranges regardless of type of tester..? I'm using and Actron, and don't find acceptable ranges, for specific vehicles on their website.

Like most scanner manufacturer’s, Actron literally cannot afford to provide such a database free of charge as the values are vehicle/model/year specific.

[Pierre's Porsche]

So, my car's been throwing codes 1128 and 1130. My MAF readings at idle with out any load are between 9,82 and 12.55. The acceptable range for these conditions is 10 to 20 kg/h. So, I'm leaning toward replacing the MAF, but someone told me these readings may be ok for my location. I live in Colorado Springs CO, elevation about 6,000 ft. So is it plausible that my MAF readings are ok given the thinner (less mass) air of this altitutude..?

Also my post cat. O2 sensors are holding steady around 0.7 volts output. This isn't too rich is it..? Thanks.

[logray]

... I posted incorrect info posted...

Edited November 1, 2011 by logray

[Pierre's Porsche]

Thanks for the quick reply Logray. I've cleaned the MAF. readings still in the 10 range. Any thought on the altitude question?

My O2 sensors, post cat., are reading a range of 0.6 to 0.7 volts. My pre cat O2 sensors fluctuate up and down in a range of 0.06 to 0.77 volts.

[Loren]

P1128 Oxygen Sensing Adaptation, Idle Range, Bank 1 – Below Limit

P1130 Oxygen Sensing Adaptation, Idle Range, Bank 2 – Below Limit

Not likely an O2 sensor since both banks report the same fault.

Possible causes:

– Incorrect signal from MAF sensor

– EVAP canister purge valve open

– Fuel pressure too high

– Fuel injector leaking

[Pierre's Porsche]

So, I replaced the Oil Filler tube and re-cleaned the MAF sensor. My MAF readings are now at 15kg/hr and Long Term Fuel Trim % are less than 5%. The LTFTM numbers were in the 17 and 18 range when the codes were displayed.

I think I solved the problem. Also while replacing the oil fillter tube I took different approach than what has been discussed in previous threads. I'll post new thread on how to replace the oil filler tube.