Trans Fail Safe mode problem

Jb1969 · Jan 29, 2020

Hello,
Can anyone help or recommended someone who can solve this problem? We have a Range Rover 4.4 2005, we bought it last August and never had a problem until it started to get cold weather. Sometimes it wont start and when I do eventually get it started it will come up Trans Fail safe mode and will be in limp mode, so I have to keep turning it off and re starting until that message doesn't appear. Once it is warmed up there isn't a problem, the car will start and not be a problem for the rest of the day!

Jb1969, Jan 22, 2020 Report

gold rover · Jan 29, 2020

How long has this been happening, have you had diagnostics on it, are there any other messages or issues?

Addit: And what work had you had done , just before it started happening?

Datatek · Jan 29, 2020

Jb1969 said:
Hello,
Can anyone help or recommended someone who can solve this problem? We have a Range Rover 4.4 2005, we bought it last August and never had a problem until it started to get cold weather. Sometimes it wont start and when I do eventually get it started it will come up Trans Fail safe mode and will be in limp mode, so I have to keep turning it off and re starting until that message doesn't appear. Once it is warmed up there isn't a problem, the car will start and not be a problem for the rest of the day!

Jb1969, Jan 22, 2020 Report

Low battery volts is the most likely cause. Cold weather always finds a weak battery and low volts can throw many faults on these cars.

tomcat59alan · Jan 29, 2020

^^^+1

Jb1969 · Jan 29, 2020

gold rover said:
How long has this been happening, have you had diagnostics on it, are there any other messages or issues?

Addit: And what work had you had done , just before it started happening?

Thanks for the reply, it has only just started to happen, no work has been done to it before, mechanical wise. I wanted to ask on here before I went ahead and did anything, also haven't had a diagnostics on it .

Jb1969 · Jan 29, 2020

Datatek said:
Low battery volts is the most likely cause. Cold weather always finds a weak battery and low volts can throw many faults on these cars.

I was thinking the same, this has only just started to happen and I know a slight fault on the battery is all these cars need for problems to occur!

gold rover · Jan 29, 2020

Jb1969 said:
Thanks for the reply, it has only just started to happen, no work has been done to it before, mechanical wise. I wanted to ask on here before I w ent ahead and did anything, also haven't had a diagnostics on it .

For those who come after, how long is 'just started', a day a week, a couple of weeks, once, twice, a dozen? Any servkces, oil changes done? And diagnostics will probably be repeated several gimes as different ideas come up

gold rover · Jan 29, 2020

Jb1969 said:
I was thinking the same, this has only just started to happen and I know a slight fault on the battery is all these cars need for problems to occur!

How old is battery? Have you tested it?

Jb1969 · Jan 29, 2020

gold rover said:
How old is battery? Have you tested it?

Not sure of the age of the battery, but have tested it and it was spot on, that was a puzzle too as I thought it would be low!

Jb1969 · Jan 29, 2020

gold rover said:
For those who come after, how long is 'just started', a day a week, a couple of weeks, once, twice, a dozen? Any servkces, oil changes done? And diagnostics will probably be repeated several gimes as different ideas come up

Just started as in within last few days, not done an oil change yet or had diagnostics done, got a disabled wife and with me being her carer time is short atm!

gold rover · Jan 29, 2020

Jb1969 said:
Just started as in within last few days, not done an oil change yet or had diagnostics done, got a disabled wife and with me being her carer time is short atm!

It is easiest to start with diagnostics. That and a good battery are the basics with these vehicles.

gold rover · Jan 29, 2020

Jb1969 said:
Not sure of the age of the battery, but have tested it and it was spot on, that was a puzzle too as I thought it would be low!

Forgot to ask , what was 'spot on' reading? These beasts have virtually zero tolerance to drop in battery.

Jb1969 · Jan 29, 2020

gold rover said:
Forgot to ask , what was 'spot on' reading? These beasts have virtually zero tolerance to drop in battery.

it was 12.2 or something when not running and went up to 14 when running, which I thought was ok, this was last weekend. but still think a new one will help though!

gold rover · Jan 29, 2020

Jb1969 said:
it was 12.2 or something when not running and went up to 14 when running, which I thought was ok, this was last weekend. but still think a new one will help though!

I can't remember the values, off-hand and search function is still not working. @Henry_b ?

Henry_b · Jan 29, 2020

Jb1969 said:
it was 12.2 or something when not running and went up to 14 when running, which I thought was ok, this was last weekend. but still think a new one will help though!

12.2 is not enough.

12.6 is a healthy battery, and yes the margins are really that small, the L322 is a fickle beast/

brianp38dse · Jan 29, 2020

12.2v is a dead battery and will drop even lower when you try and start the motor.

brianp38dse · Jan 29, 2020

When you get a new battery make sure it is the biggest that will fit i am talking a few mm to spare especially if your motor is a vogue trim, 120 ah 1000cca is what you need.

Trans Fail Safe mode problem

Jb1969

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