Baro/Map Problem - Ford Powerstroke Diesel Forum
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Old 06-12-2012, 09:31 AM
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Exclamation Baro/Map Problem

My 04 turbo seems to cut out when taking off after idling for a few minutes. It has no whistle from the turbo for a few seconds then picks up and may or may not do it again throughout the day. It has 155,XXX on it. I put a Garrett PowerMax turbo a few months ago along with head studs, egr/cooler delete and coolant filter.

Getting two codes

P0069 Barometer correlation
P0107 Map Sensor Low

I have had the P0107 before and have already replaced the map sensor, the hose going to it and cleaned out the fitting in the intake. I was told that the Baro should only be .5 above the map KOEO. It is more like 1.5 or 2 above.

Any ideas? Baro bad?
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Old 06-12-2012, 10:20 AM
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Sometimes sensors are actually telling the truth. Your baro and map readings ae not jiveing. Both sensors are proably good but due to a intake air leak or a restricted (crudded up intake) or CAC the airflow to the engine is lower than it should be you may have to have your intakemanifold or cac vated and boiled out.

I have seldom seen a baro fail, all it does is read atmospheric pressure.
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Old 06-12-2012, 10:37 AM
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Thank you for the reply.

I have less than 5,000 miles on the truck since the intake and all other parts were thoroughly cleaned. Anything that had to come off to replace the turbo and head studs were boiled out and then ran through a parts washer.

I can watch the PID for the Baro on the CTS, when starting down the road it will drop to 7.X then shoot up to 15.5 and stay there.

I will check for leaks in the intake hoses when I get home.

It hasnt thrown a code for quite a while, but thinking back we did have a big thunderstorm yesterday before I left work. Do you think that had anything to do with it?
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Old 06-12-2012, 12:40 PM
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Well with that info. While I have never seen a baro fail it doesnt mean it can't. If the readings are changeing then it is probably bad since it should not change at all unless you drive up to the top of a mountain or something and change atmospherice pressure.
Does the CT give a actual pressure reading or just voltage?
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Old 06-13-2012, 10:45 AM
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It reads PSI. Normally sits at 15.5 and map is around 15 at an idle.
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