P1775 Gearbox Fault
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Drifting
Joined: Nov 2007
Posts: 41
Likes: 0
From:
P1775 Gearbox Fault
Hi,
Have a '97 LR Range Rover 4.0 and the 'check engine' light came on. A scan revealed the DTC Code P1775 - Gearbox Fault. I checked the transmission fluid and after several checks to be sure I got the same results. The fluid level read far above the accepted range level. I have not added any fluid so I don't know what is going on. I waited 1 hour to be sure that the engine was cold and level. The truck has not stalled and 'appears to running ok. Also, have not been able to clear the code. Any suggestions from anyone? Thanks.[X(]
Have a '97 LR Range Rover 4.0 and the 'check engine' light came on. A scan revealed the DTC Code P1775 - Gearbox Fault. I checked the transmission fluid and after several checks to be sure I got the same results. The fluid level read far above the accepted range level. I have not added any fluid so I don't know what is going on. I waited 1 hour to be sure that the engine was cold and level. The truck has not stalled and 'appears to running ok. Also, have not been able to clear the code. Any suggestions from anyone? Thanks.[X(]
Rock Crawling
Joined: May 2007
Posts: 314
Likes: 9
From: North Carolina
RE: P1775 Gearbox Fault
my guess is you have a forth gear and/or 3rd gear monitoring fault in the
TCM (transmission control module)
after you confirm what faults you have in the TCM i can tell you
what to do next. 75% of the time, the air filter is not sealing correctly and
it has allowed unfiltered air to coat the mass air flow meter.
hey wait, you don't have an k&n air filter in there do you?
TCM (transmission control module)
after you confirm what faults you have in the TCM i can tell you
what to do next. 75% of the time, the air filter is not sealing correctly and
it has allowed unfiltered air to coat the mass air flow meter.
hey wait, you don't have an k&n air filter in there do you?
Thread Starter
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Drifting
Joined: Nov 2007
Posts: 41
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From:
RE: P1775 Gearbox Fault
Thanks for your help. No, I have a Fram Air Filter.
Here's what my codes are:
P1177 - FMFR Correction At maximum negative value
Synchronization fault
Maximum positive FMFR correction fault
P1775 - Gearbox fault
Transmission system MIL fault
I got these definitions from various sites detailing the Code explanations. Unfortunately I don't hava a clue as to what any of this means. Can you help? Meanwhile, I'll check the air-cleaner clips and make sure they are secured. I think that's what you meant. I hope to hear more from you.
Here's what my codes are:
P1177 - FMFR Correction At maximum negative value
Synchronization fault
Maximum positive FMFR correction fault
P1775 - Gearbox fault
Transmission system MIL fault
I got these definitions from various sites detailing the Code explanations. Unfortunately I don't hava a clue as to what any of this means. Can you help? Meanwhile, I'll check the air-cleaner clips and make sure they are secured. I think that's what you meant. I hope to hear more from you.
Rock Crawling
Joined: May 2007
Posts: 314
Likes: 9
From: North Carolina
RE: P1775 Gearbox Fault
the gearbox fault means that there also faults in the transmission that
must be read and cleared to shut off the check engine light.
that's also what i will basing my diagnosis of your rover on.
normally when i see a gearbox and mixture type fault
and 4th and 3th gear motoring fault is in the TCM
i first look at the filter, filter box, mass air flow meter of the duct from the
filter box to the plenum intake. here are some thinks i have found in the past.
1) when people change the filter and unclip the top lid from the air box
and separate it from the mass air flow meter, the sealing o-ring between
the mass air flow meter and the top of the air box is lost
2) one of the alignment tabs on the top part of the air box lid will bend
over and will allow the dirty air to bypass the filter.
3) people use an after market air filter that just won't seal and the
dirty air bypasses the filter (the path of less resistance)
let me know when you find out the fault code that the tcm has.
must be read and cleared to shut off the check engine light.
that's also what i will basing my diagnosis of your rover on.
normally when i see a gearbox and mixture type fault
and 4th and 3th gear motoring fault is in the TCM
i first look at the filter, filter box, mass air flow meter of the duct from the
filter box to the plenum intake. here are some thinks i have found in the past.
1) when people change the filter and unclip the top lid from the air box
and separate it from the mass air flow meter, the sealing o-ring between
the mass air flow meter and the top of the air box is lost
2) one of the alignment tabs on the top part of the air box lid will bend
over and will allow the dirty air to bypass the filter.
3) people use an after market air filter that just won't seal and the
dirty air bypasses the filter (the path of less resistance)
let me know when you find out the fault code that the tcm has.
Thread Starter
|
Drifting
Joined: Nov 2007
Posts: 41
Likes: 0
From:
RE: P1775 Gearbox Fault
ORIGINAL: raid13
the gearbox fault means that there also faults in the transmission that
must be read and cleared to shut off the check engine light.
that's also what i will basing my diagnosis of your rover on.
normally when i see a gearbox and mixture type fault
and 4th and 3th gear motoring fault is in the TCM
i first look at the filter, filter box, mass air flow meter of the duct from the
filter box to the plenum intake. here are some thinks i have found in the past.
1) when people change the filter and unclip the top lid from the air box
and separate it from the mass air flow meter, the sealing o-ring between
the mass air flow meter and the top of the air box is lost
2) one of the alignment tabs on the top part of the air box lid will bend
over and will allow the dirty air to bypass the filter.
3) people use an after market air filter that just won't seal and the
dirty air bypasses the filter (the path of less resistance)
let me know when you find out the fault code that the tcm has.
the gearbox fault means that there also faults in the transmission that
must be read and cleared to shut off the check engine light.
that's also what i will basing my diagnosis of your rover on.
normally when i see a gearbox and mixture type fault
and 4th and 3th gear motoring fault is in the TCM
i first look at the filter, filter box, mass air flow meter of the duct from the
filter box to the plenum intake. here are some thinks i have found in the past.
1) when people change the filter and unclip the top lid from the air box
and separate it from the mass air flow meter, the sealing o-ring between
the mass air flow meter and the top of the air box is lost
2) one of the alignment tabs on the top part of the air box lid will bend
over and will allow the dirty air to bypass the filter.
3) people use an after market air filter that just won't seal and the
dirty air bypasses the filter (the path of less resistance)
let me know when you find out the fault code that the tcm has.
Rock Crawling
Joined: May 2007
Posts: 314
Likes: 9
From: North Carolina
RE: P1775 Gearbox Fault
i feel you joy, but sometimes the light will return of you don't reset the adaptions in the
engine control module, i would also like to see you put a land rover air filter in there too.
i think it takes an ESR4238.
all the best.
engine control module, i would also like to see you put a land rover air filter in there too.
i think it takes an ESR4238.
all the best.
Thread Starter
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Drifting
Joined: Nov 2007
Posts: 41
Likes: 0
From:
RE: P1775 Gearbox Fault
ORIGINAL: raid13
i feel you joy, but sometimes the light will return of you don't reset the adaptions in the
engine control module, i would also like to see you put a land rover air filter in there too.
i think it takes an ESR4238.
all the best.
i feel you joy, but sometimes the light will return of you don't reset the adaptions in the
engine control module, i would also like to see you put a land rover air filter in there too.
i think it takes an ESR4238.
all the best.
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