Last week I got in my 03 kj and seen the engine light was on then noticed it was only driving in 2nd gear. I've tried taking the battery terminals off for a bit to reset everything but that didn't help. I went to a shop and they gave me the codes P0605 and P0706, I was told the main pcm was tearing up and was giving a website I could order a pcm that was programmed by vin. I got that part today but it still didn't fix anything. Doing the same thing, I left the terminals off for 2 or 3 hours and the light stayed off for probably 2 minutes but then came right back on. Any help would be greatly appreciated!
Check engine light limp mode help
- Thread starter Codad
- Start date
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The P0706 is likely the culprit for the limp mode. I'd take it to a reputable transmission shop (I use one that specializes in Mopar stuff) and have them read the CVIs (clutch value indicies) - that'll give you a complete picture of the transmission's health.
Alright, not really any decent ****** shops near me though... Only one the dude stays high on drugs
LOL...must be a Toyota guy then 
Dealer honestly might be your best bet...they're the only ones besides a good ****** shop that would have the right scanner to look deep. It's less expensive to pay for a good diagnosis than to fire up the parts cannon and replace stuff that doesn't fix it.
Dealer honestly might be your best bet...they're the only ones besides a good ****** shop that would have the right scanner to look deep. It's less expensive to pay for a good diagnosis than to fire up the parts cannon and replace stuff that doesn't fix it.
LOL...must be a Toyota guy then
Dealer honestly might be your best bet...they're the only ones besides a good ****** shop that would have the right scanner to look deep. It's less expensive to pay for a good diagnosis than to fire up the parts cannon and replace stuff that doesn't fix it.
... which the OP has already started doing based on the prior shop's recommendation .. no.. affirmative statement that the PCM was failing. Possible that it was, along with a transmission issue.
But I second your opinion, the dealership technicians are going to be the best trained and experienced in this scenario.
So since the shop said replace PCM and it'll fix it, and it didn't... are they paying for it now?
Also, disconnecting the terminals does not reset or clear anything (permanently). Just like shutting the power off and unplugging your computer does not clear it all out of any data, neither does disconnecting power to the vehicle. It'll delay the MIL (malfunction illumination light) aka Check Engine Light from coming back on for a bit.. but once the PCM and various sensors and modules report back that there is a problem, it'll just come back on. You need an actual diagnostic scanner/coed reader to at the very least clear all the faults from the system.
But again, if the issue has not been corrected, after enough time, usually so many key cycles or drive time/mileage, the light will come back to indicate you still have an issue.
You need to re-read the fault codes now that you have that expensive, shiny new PCM in there.. see what DTC's show up and if one of them is still that trans code, P0706. If so, transmission shop/dealer shop to check those clutch values.
If it still shows the P0605 after I get it scanned again I plan on returning the pcm as it didn't fix anything
That would be a fair assessment.
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