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Need Help Diagnosing! 05 2.4l Turbo

 
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Old 04 Jan 2017, 09:39 pm
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Default Need Help Diagnosing! 05 2.4l Turbo

I just got a 05 2.4l Turbo with some problems....Its been sitting for a couple months and i bought it off somebody since they didn't want it anymore.
Its throwing major codes right now
P2096-Fuel Trim too lean(O2 Sensor)
p0522-Engine oil pressure sensor circuit low
p0137-(O2 Sensor)
p0133-(O2 Sensor)
p1684-Battery power to module disconnected(this code appeared or i finally found it when the car started shifting hard)
p1190-Engine Vacuum leak
You can hear a vacuum leak air noise somewhere next to the radiator cap but its hard to isolate where its coming from.

Its also acting hard to start on cold days but when its warm it runs fine.

Driving down the highway I've noticed it shifts gears rather rough like its shifting to early.

Any ideas where to Begin? i know i should probably replace the O2 sensors which i plan on doing tomorrow.

My oil pressure sensor gave me a code when the trans started shifting hard.
Other then that it runs alright.
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Old 04 Jan 2017, 09:42 pm
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Default Re: Need Help Diagnosing! 05 2.4l Turbo

Welcome to the forum
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Old 04 Jan 2017, 10:52 pm
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Default Re: Need Help Diagnosing! 05 2.4l Turbo

Welcome to the forum.

Are you sure the code was P1190?

P1190 - Throttle Inlet Pressure Sensor Circuit :

Possible Causes:

1. Throttle Inlet Pressure Sensor circuit is open
2. Throttle Inlet Pressure Sensor signal circuit is open
3. Throttle Inlet Pressure Sensor signal circuit is shorted to chassis or Sensor ground
4. Throttle Inlet Pressure Sensor is damaged or it has failed
5. PCM has failed

Before doing anything else I would suggest checking the wiring going to the Throttle Inlet Sensor and the sensor itself if the code number is correct.

Have you tried resetting the codes with an OBDII Scan Tool and see if the same codes come back? You have codes that are not common showing up.
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Last edited by ptcruisersteve; 05 Jan 2017 at 12:52 am.
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Old 04 Jan 2017, 11:35 pm
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Default Re: Need Help Diagnosing! 05 2.4l Turbo

Quote:
Originally Posted by LucySkyDiamand25 View Post
I just got a 05 2.4l Turbo with some problems....Its been sitting for a couple months and i bought it off somebody since they didn't want it anymore.
Its throwing major codes right now
P2096-Fuel Trim too lean(O2 Sensor)
p0522-Engine oil pressure sensor circuit low
p0137-(O2 Sensor)
p0133-(O2 Sensor)
p1684-Battery power to module disconnected(this code appeared or i finally found it when the car started shifting hard)
p1190-Engine Vacuum leak
You can hear a vacuum leak air noise somewhere next to the radiator cap but its hard to isolate where its coming from.

Its also acting hard to start on cold days but when its warm it runs fine.

Driving down the highway I've noticed it shifts gears rather rough like its shifting to early.

Any ideas where to Begin? i know i should probably replace the O2 sensors which i plan on doing tomorrow.

My oil pressure sensor gave me a code when the trans started shifting hard.
Other then that it runs alright.

Start with the noise. IF there's a manifold leak (such as beside the radiator cap), it could well cause the issues I've marked in red.

The other codes could just be a loose wire and that could also cause a hard tranny shift.

If me, I'd start with the noise and go from there. The plastic manifold is joined together with O-ring gaskets right about the height of the radiator cap. If someone removed the intake during a tune up and didn't get the gaskets back in right, you could well have the situation you describe sans the battery disconnection. Begin this by removing the vanity cover on the intake manifold. You can then see a lot more.




PS: Be sure and check the PCV valve too. It's near there on top of the valve cover and the rubber part of the hose that connects to it tend to degrade with time and become loose.
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Old 05 Jan 2017, 09:35 am
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Default Re: Need Help Diagnosing! 05 2.4l Turbo

Couple things I should mention

We replaced the battery with a new one so that could be why it gave that battery disconnect code

The o2 sensors codes were on in the very beginning before I got the air leak code.

We changed the pcv valve and put a new hose on it.

Also the o2 sensors have no history of being changed on this car at all.

I'm thinking it won't hurt to change the sensors and see what it does.

If pcm is failing wouldn't that cause problems with my fan and others as well?
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Old 05 Jan 2017, 10:29 am
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Default Re: Need Help Diagnosing! 05 2.4l Turbo

Quote:
Originally Posted by LucySkyDiamand25 View Post
Couple things I should mention

We replaced the battery with a new one so that could be why it gave that battery disconnect code

The o2 sensors codes were on in the very beginning before I got the air leak code.

We changed the pcv valve and put a new hose on it.

Also the o2 sensors have no history of being changed on this car at all.

I'm thinking it won't hurt to change the sensors and see what it does.

If pcm is failing wouldn't that cause problems with my fan and others as well?
Highly recommended you reset the codes with an OBDII Scan Tool and see if you have the same codes coming up. Unit you do this you might be going in the wrong direction.
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Old 06 Jan 2017, 08:18 am
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Default Re: Need Help Diagnosing! 05 2.4l Turbo

Ok reset the codes and it gave me p2096 and that's it....I'm still thinking it's the O2 sensors...it's got 125k on it and no history of the sensors being changed...I'll go to autozone and by the sensor and replace it then drive it some more and see what it does...if all else fails I can take the sensors back and get my money back.
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Old 06 Jan 2017, 08:37 am
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Default Re: Need Help Diagnosing! 05 2.4l Turbo

You should get NTK, not bosch. IMO

Electronics aren't generally returnable after you use them so if you'll be stuck with new sensors, i recommend the better ones.. NTK.

Not saying you need o2's, just recommending you get NTK since you have made up your mind already.
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Old 06 Jan 2017, 08:44 am
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Default Re: Need Help Diagnosing! 05 2.4l Turbo

Another cause for lean codes is an exhaust leak. Car will run to rich and think it's too lean. Could be the vacuum leak you hear is actually an exhaust leak?

Happened to me but not on a PT. A smog pump was pumping too much air in 2' downstream and the o2's were sensetive enough to read wrong from it

could be a cracked exhaust manifold you hear and causing your codes? pics of said cracks: NitroPT manifold madness

Last edited by rob302; 06 Jan 2017 at 10:16 am.
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Old 06 Jan 2017, 10:28 am
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Default Re: Need Help Diagnosing! 05 2.4l Turbo

P2096 - Downstream Fuel System 1/2 Lean Conditions:

Possible Causes:

1. Exhaust leak
2. Engine mechanical problem
3. O2 Sensor has failed
4. O2 Sensor signal circuit or return circuit problem
5. Fuel contamination

I agree with Rob302 check for exhaust leaks first then I would check for engine mechanical problems. You might have something causing the 02 sensors to trigger.
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Last edited by ptcruisersteve; 06 Jan 2017 at 04:03 pm.
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