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Malfunction indicator light

 
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Old 07 Dec 2004, 03:34 pm
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Default Malfunction indicator light

On the wife's Cruiser malfunction light came on and stayed, it's
mot blinking.Looked in book said it could be bad gas or loose gas cap. Or something like that.I did error code deal,I think I did it right. It came up P 1604, what does that mean?
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Old 07 Dec 2004, 03:57 pm
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Jimbo,

Don't think this will help much but....

Additional Diagnostic Trouble Code Ranges

Other DTC ranges are defined for either manufacturer specific codes or under the control of SAE (Society of Automotive Engineers) and not yet defined. This section documents these additional ranges. Refer to your vehicle’s repair manual for manufacturer specific Diagnostic Trouble Codes.

P09XX Transmission

P1XXX Manufacturer Controlled

P10XX Fuel and Air Metering and Auxiliary Emission Controls

P11XX Fuel and Air Metering

P12XX Fuel and Air Metering

P13XX Ignition System or Misfire

P14XX Auxiliary Emission Controls

P15XX Vehicle Speed, Idle Control, and Auxiliary Inputs

P16XX Computer and Auxiliary Outputs
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Old 07 Dec 2004, 04:49 pm
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took it to dealer, He said if it's still on Thursday make an apointment. Went to get back in car and started it ,the light
was out.So I guess all is well.
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Old 07 Dec 2004, 05:19 pm
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The sevice department probably just took the bulb out[:I] Just kidding Jimbo. I'm sure the problem was taken care of, sounds like you have a decent dealer.
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Old 07 Dec 2004, 05:20 pm
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P1604 is "PCM internal dual-port RAM read/write integrity failure". The test checks for power to the PCM with key on. If the power supply is okay, you replace the PCM, period. [:O] Sounds like you have an intermittent power problem or the PCM is dying internally. You could check connections, but this should be covered under warranty.
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Old 07 Dec 2004, 06:42 pm
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Quote:
quote:Originally posted by purple04

P1604 is "PCM internal dual-port RAM read/write integrity failure". The test checks for power to the PCM with key on. If the power supply is okay, you replace the PCM, period. [:O] Sounds like you have an intermittent power problem or the PCM is dying internally. You could check connections, but this should be covered under warranty.
I guess i'm going to have to wait till it dies, because
right now it's ok and they won't fix anything that's OK.
Thanks for the heads up on the code.
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Old 07 Dec 2004, 08:18 pm
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Depending on your relationship with the dealer, they may just replace the PCM. The code will stay in history for a while (50 starts), so they can 'pull' it. If you say "Will you cover the tow when it dies?" they may be more willing to fix it before you get stranded, especially if there are any recalls that have not been done to your car. Call with your VIN and a decent attitude.
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Old 08 Dec 2004, 02:44 am
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Hypergrounding will fix it! [:I] Draws off all the bad Karma and puts Bling-Bling back into the putz! [8]
Also could be time to trade....see above.
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Old 04 Mar 2008, 06:27 am
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Default Re: Malfunction indicator light

Quote:
Originally Posted by purple04 View Post
P1604 is "PCM internal dual-port RAM read/write integrity failure". The test checks for power to the PCM with key on. If the power supply is okay, you replace the PCM, period. [:O] Sounds like you have an intermittent power problem or the PCM is dying internally. You could check connections, but this should be covered under warranty.
Where'd you find that?
"P1604 Loss of IPC serial data"
Son-in-law's '03 GT got it. (the P1604)
Car runs fine.
I told him to take it to a parts store that'll plug in for free see if there's more info.

All he said what he was starting, and let the key go before it fully caught, and got the check engine light. Started the car but light stayed on.
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Old 10 Dec 2008, 09:24 pm
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Default Re: Malfunction indicator light

i got the p 1604 code just now and have been having problems with my pt and when i took it to auto zone they said 3rd cylinder dont know if i did the test right this was my first time doing it.
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