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post #1 of (permalink) Old 10-10-2011, 02:22 PM Thread Starter
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Engine Codes Help P0440 and P1811

Hi all,

any help would be appreciated. 2003 3.8L v6 impala. I have engine codes P0440 and P1811.

The 0440 pertains to EVAP. I checked the gas cap and it had a rotting gasket so I replaced that. Light has been off thus far...

P1811 code stated "max adapt and longshift." anyone have any input or remedies for such? trans is original with 188k miles. slips sometimes but never got a CEL for that. but upon scanning the computer these are the codes i found...

thanks
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post #2 of (permalink) Old 10-11-2011, 09:34 AM
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When was the transmission serviced last? How is the fluid level and condition?

1978 Caprice Classic Landau
350 2-bolt, stock 4bbl
Stock rebuilt TH350
Edelbrock performer cam + intake
Dual 2 1/2" Flowmaster exhuast (waiting to be installed)
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post #3 of (permalink) Old 10-13-2011, 11:35 PM Thread Starter
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king,

you're like the only one that regularly peruses the forum and answers! lol

fluid and filter were changed last year, or about 10k miles ago. level is correct and condition of fluid is good.
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post #4 of (permalink) Old 10-14-2011, 10:05 AM
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Originally Posted by child_of_fire View Post
P1811 code stated "max adapt and longshift." anyone have any input or remedies for such? trans is original with 188k miles. slips sometimes but never got a CEL for that. but upon scanning the computer these are the codes i found...

thanks
Sounds to me that the bands in the transmission are about shot. It is having to hold the pressure longer in each gear to get up to speed. Get ready for an overhaul or replacement of the transmission. 188K on a OEM tranny for this vehicle series is really good.


1977 Chevrolet Impala Sedan, 305, TH200, 2.56:1, 110K miles, 37 Lifetime Warranty Parts.
1989 GMC C1500 Sierra ECSB 350, HM290, 3.08:1, 338K miles, 15 Lifetime Warranty Parts.

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post #5 of (permalink) Old 10-14-2011, 10:13 AM
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No bands in these, but worn clutches could result in the same condition. 188k on one transmission is crazy, so it's not surprising.

1978 Caprice Classic Landau
350 2-bolt, stock 4bbl
Stock rebuilt TH350
Edelbrock performer cam + intake
Dual 2 1/2" Flowmaster exhuast (waiting to be installed)
Edelbrock IAS Classic shocks
95 9C1 3.08 posi
4 wheel disc brakes!
16x8 American Racing Baja's with 225/60/16 Pirelli P4's

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post #6 of (permalink) Old 10-15-2011, 02:09 PM
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check out this site- it has some info on the p1811 code-
Harsh Shift, P1811
besides the code is there any noticable problems while driving?
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post #7 of (permalink) Old 10-17-2011, 12:13 AM Thread Starter
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car still is a champion. i know its starting to go but 188k miles is a well lived life. i get slight slippage every now and again but i live with it. i just happened to have use of a free scanner and i checked the computer and that was the code that came up.

its an '03 in good shape with high mileage. im not sure it'd be worth the investment to overhaul the trans. anyone fond of the new impalas?
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post #8 of (permalink) Old 10-17-2011, 12:19 PM
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I would rebuild the entire car with a 7th gen a hundred times before getting an 8th gen

1978 Caprice Classic Landau
350 2-bolt, stock 4bbl
Stock rebuilt TH350
Edelbrock performer cam + intake
Dual 2 1/2" Flowmaster exhuast (waiting to be installed)
Edelbrock IAS Classic shocks
95 9C1 3.08 posi
4 wheel disc brakes!
16x8 American Racing Baja's with 225/60/16 Pirelli P4's

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post #9 of (permalink) Old 10-17-2011, 06:46 PM
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1977 Chevrolet Impala Sedan, 305, TH200, 2.56:1, 110K miles, 37 Lifetime Warranty Parts.
1989 GMC C1500 Sierra ECSB 350, HM290, 3.08:1, 338K miles, 15 Lifetime Warranty Parts.

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post #10 of (permalink) Old 10-24-2011, 12:08 PM Thread Starter
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Quote:
Originally Posted by kingnutin View Post
I would rebuild the entire car with a 7th gen a hundred times before getting an 8th gen
why is this the common opinion of the 7th/8th gen?
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post #11 of (permalink) Old 10-25-2011, 10:23 AM
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Because the only changes they made for the 8th gen were negative, though the styling is subject to taste. The weight distribution is way off, the brakes suck, they eat tires, they're worse on transmissions, they're harder to work on, the suspension sucks... the list goes on. Honestly I think the only reason anyone here likes them, is either because they blindly believe that newer is better, or because they got sucked in by the V8 option.

1978 Caprice Classic Landau
350 2-bolt, stock 4bbl
Stock rebuilt TH350
Edelbrock performer cam + intake
Dual 2 1/2" Flowmaster exhuast (waiting to be installed)
Edelbrock IAS Classic shocks
95 9C1 3.08 posi
4 wheel disc brakes!
16x8 American Racing Baja's with 225/60/16 Pirelli P4's

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post #12 of (permalink) Old 10-25-2011, 11:05 AM
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I got sucked in by the V8 option..... No regrets. But... 7th gens do seem to be more trouble free. But... I wanted a warranty and therefore needed a newer car But....7th gens are better looking on the outside But.... 8th gens are better looking on the inside But......

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