04.5 codes

[carnut]

Sorry if this question has been asked and answered before as I'm new to the forum or any forum for that mater. I have an 04. 5 that has a MAC air intake and pusher intake horn with an EDGE juice and 5 inch exhuast Aero tech muffler. As you can see pretty tame in comparison. The truck has 90 k on it and every winter when temps drop below about 35 degrees I get a too cold air intake temp engine code. It has been this way since day one, I haven't tried to block off air flow as my primary use is towing on average 5-14k lbs. Truck has been reliable with the exception of the trans, 5 by 72K. My real question is has anyone experienced the same engine code in cold temps and what was the fix without causing problems towing any weight



Thanks

 

[cerberusiam]

That has been reported as one of the issues with cold air intakes in cold weather. A winter front that holds as much warm in the engine bay or blocking off access to outside cold air has been used to solve it, sometimes. These trucks do not need much to to flow enough air to support 500 HP thru the stock filter. Some hole sin the bottom of the air box and its good to go.



Not sure what your CAI is but its probably just grabbing too much cold air at times.

 

[SierraRam]

Thats just the warning for you to keep your rear in the nice warm cab!

 

[carnut]

Thanks guys

The code's don't really bother me much but the lack of overdrive does when it occurs, Problem here is it keeps me from driving the truck for a few months unless I block off the grille area as suggested. I actually had the problem with the factory intake on the truck as well. I do agree that when it's cold it's an early indicator to stay in the truck, problem with that is the play time in the snow. Thanks again for the input.

 

[AH64ID]

Does it happen at startup or after driving for a while? How cold out is it when it happens? I have had intake temps below 10*F and never seen that code. .



I wonder if its due to a faulty grid heater at startup?

 

[carnut]

Typically anything below 35-40 and I start seeing it. The colder it is the longer it lasts. It also will do it after it's been driven for a while. In fact the other day 34 degrees outside, started the truck and let it warm up a bit. drove it about 20 miles shut it off at operating temp. Started again about 20 minutes later drove it for 10 miles and the check engine light came on same code, drove about 40 miles and the outside temp warmed up to over 40 and it reset itself.

 

[AH64ID]

That's not normal for sure. What is the specific code?

 

[carnut]

I'll have to plug my reader into again but if I recall the text is cold charge air temp or cold intake temp. Also the grid heater is working fine I've had the horn off and checked it a couple of times and it definately works.

 

[AH64ID]

Since you have a E J/A you can watch IAT's right?



Are the IAT's normal? You said you tested the grid heater, can you see the grid heater warm up the IAT's?



Also first thing in the morning check the IAT again the ambient temp, they should be within a few degrees if the truck isn't in the sun or plugged in.

 

[carnut]

thanks I'll check that and post back later this week with what I find out.

 

[carnut]

Thought I would give a quick update to this. I did run the data logger over the weekend and didn't notice any noticable temperature differences in the intake air in comparison to outside air. I'm going to check the grid more this weekend and see that it is actually getting power and trace through the system to see what I find. I'll post a new update later.

 

[carnut]

WEll it's been a few weeks and still not resolved what causing this. I am getting a low circuit code on the air intake, I'm going to try checking the sensor and cleaning to see if that makes any difference. Above 40 since I posted originally and not haveing any issues with it this time. I've checked relays and power at Grid and they were good. Thanks for your posts and advice on this one.

 

[carnut]

Sorry for the delay but I wanted to put this issue to rest. I did find the cause of the code. Turns out that the wire that activates one of the solenoids was fairly loose. This created an intermittent problem which I was able to finally find with all your help. Thanks for the suggestions and input.

 

[Bob4x4]

I suggest you post the actual dtc# not the definition you come up with. Many scanners will define the code incorrectly. This will confuse the issue rather than getting accurate help.

 

[carnut]

Thanks good point. When I originally posted this I had forgot what the code actually was. Turns out to be a P2607 code. The positive side of the relay coil was the culprit. It was a loose connection creating an intermittent problem.