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"Check Engine" "Check Transmission" "AT/OIL" Lights
02-20-2014, 07:13 PM
Post: #1
"Check Engine" "Check Transmission" "AT/OIL" Lights
2004 Isuzu Rodeo 3.2 6 cylinder automatic 4wd 76,000 miles

6 weeks ago the "Check Engine" & flashing "Check Transmission" lights came on while I was driving in 4wd in snow. The car seems to be running fine, fluid levels were OK, and the transmission shifted properly. I took it to my mechanic who checked it out and found no issue & reset the codes.
Yesterday while driving 70mph on the highway the same lights came on. I was 3 miles from where I was going so I kept driving. The "AT/OIL" light came on just before I stopped. Check of the fluids was OK so the this morning I took it to a mechanic in the town I was visiting. He found nothing wrong and reset the codes.
I drove 70 miles home and 50 miles into the trip the "AT/OIL" came on for about 10 seconds and went off without me doing anything but slowing down 10mph. Just as I got home the "Check Engine" & flashing "Check Transmission" lights came back on. As before, the fluid levels and performance of the car were normal.
Any ideas as to what is going on?
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02-20-2014, 08:23 PM
Post: #2
RE: "Check Engine" "Check Transmission" "AT/OIL" Lights
Are the mechanics that are checking it out using a "Full Function" scanner? A lot of the cheaper "Code Readers" can't access all of the systems. Have the codes read with a Full Function scanner, record them, post the code Numbers here, and have them cleared again. Once we know the code numbers we can provide more accurate information for you.

Thanks for using the forum,
Garner

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02-20-2014, 10:42 PM
Post: #3
RE: "Check Engine" "Check Transmission" "AT/OIL" Lights
You might also look in the owners manual under "warning lights" or the section explaining the 4wd system. It's amazing what info is in there these days and it might be as simple as an air flow issue on an external cooler (snow, ice, leaves, etc) or a reminder that you were in 4wd at highway speed for an extended period. (like that reminder for having your signal light on too long)
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03-01-2014, 11:31 AM
Post: #4
RE: "Check Engine" "Check Transmission" "AT/OIL" Lights
(02-20-2014 08:23 PM)Garner Wrote:  Are the mechanics that are checking it out using a "Full Function" scanner? A lot of the cheaper "Code Readers" can't access all of the systems. Have the codes read with a Full Function scanner, record them, post the code Numbers here, and have them cleared again. Once we know the code numbers we can provide more accurate information for you.

Thank you for your reply. Sorry for the delay, I have been waiting for the codes to come up again. The codes for this problem are P0700 & P0741.

Rick
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03-01-2014, 11:53 AM
Post: #5
RE: "Check Engine" "Check Transmission" "AT/OIL" Lights
Possible causes
- Shorted or open circuit within Transmission Control Module (TCM)
- Faulty Transmission Control Module (TCM)

Since the P0700 on an Isuzu is just and informative code, check the TCM for more codes to resolve the problem. IOW, see what other codes are found.

P0741 is a torque converter code and that means dropping the pan to see what condition things are in. IOW, it could be as simple as a solenoid in the valve body or more serious depending on what's found in the pan and the condition of the oil.

BTW, a Google search shows that vintage vehicle (03 & 04) is listed for a recall (last fall) due to rust around the front suspension parts. I would look into that further before considering anything expensive on driveline repairs. Last time Toyota had a similar recall they offered a sweet deal for trade in on a new vehicle. I believe it was double the book value plus other incentives. You never know what's out there till you ask!
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03-01-2014, 12:36 PM
Post: #6
RE: "Check Engine" "Check Transmission" "AT/OIL" Lights
(03-01-2014 11:53 AM)Rupe Wrote:  Possible causes
- Shorted or open circuit within Transmission Control Module (TCM)
- Faulty Transmission Control Module (TCM)

Since the P0700 on an Isuzu is just and informative code, check the TCM for more codes to resolve the problem. IOW, see what other codes are found.

P0741 is a torque converter code and that means dropping the pan to see what condition things are in. IOW, it could be as simple as a solenoid in the valve body or more serious depending on what's found in the pan and the condition of the oil.


BTW, a Google search shows that vintage vehicle (03 & 04) is listed for a recall (last fall) due to rust around the front suspension parts. I would look into that further before considering anything expensive on driveline repairs. Last time Toyota had a similar recall they offered a sweet deal for trade in on a new vehicle. I believe it was double the book value plus other incentives. You never know what's out there till you ask!


I am having the transmission issue looked at by an Isuzu dealer Thursday. They will also address the recall of corrosion on the forward mounting point areas of the rear suspension then. Thanks for the reply
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03-01-2014, 05:57 PM
Post: #7
RE: "Check Engine" "Check Transmission" "AT/OIL" Lights
The site where I read the recall didn't say it was the rear suspension so it was just a shot in the dark. Thanks for the clairfication.
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03-02-2014, 02:18 AM
Post: #8
RE: "Check Engine" "Check Transmission" "AT/OIL" Lights
(03-01-2014 05:57 PM)Rupe Wrote:  The site where I read the recall didn't say it was the rear suspension so it was just a shot in the dark. Thanks for the clairfication.

How many miles do you think I can safely/slowly drive the rodeo to the dealship? One way will be about 50 miles.
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03-02-2014, 10:22 AM
Post: #9
RE: "Check Engine" "Check Transmission" "AT/OIL" Lights
I can only tell you what to look for so you can make the final call on the safety aspect. Knowing that it's the rear suspension and the forward mounting points, you should take a gander with some good light and see how rusty those areas are. Poke at them with a sharp tool if need be to get past any undercoating. The part in question would be those areas of the body, which are typically reinforced sheet metal in several layers. (that holds water and makes rust) If nothing is falling off and you can't penetrate the metal easily then you are probably ok. If you have been hearing rattles, clunks, and groans from that area and it looks cruddy then you may already be in trouble.

Hint: If you want to post a picture of your findings there's an option through the "new reply" button for low resolution shots. (300kb?) What some people have done is post larger sizes to PhotoBucket or a short video to YouTube then post the link here. That will get you past the file size limitation.
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03-02-2014, 10:40 AM
Post: #10
"Check Engine" "Check Transmission" "AT/OIL" Lights
I would like to add a comment for the transmission issue. One of the most common causes of the P0741 code in Asian vehicles is Low Fluid Level. The reason for this is that a lot of them are to be checked in Neutral instead of Park. You wouldn’t think that it would matter, but it makes a big enough difference to cause problems. So I would suggest checking the owners manual for the proper procedure for checking the fluid level. Make sure it is full with the proper fluid. Nothing is Absolute but no further damage SHOULD occur from driving it to the dealer. The torque converter isn’t locking up which usually doesn’t hurt anything except your fuel economy. Here’s a link where you can read about it.

Isuzu P0741

Please let us know what you find out.

Thanks for using the forum,
Garner

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