Hello! I just purchased an 08' LR3 with 117k miles and have a couple questions

-Engine light went on when i was driving it home, brought it into dealer and they told me one of my catalytic converters were dead, tech said i can drive it til the wheels fall off on one cat its entire life, any downsides to that?

-Has a "Check tyre pressure" Sensor going off, but tires are all filled up and good to go, how can i erase this warning other than replacing the sensor? (I just bought an obd2 scanner) can i do it thru there?

-And lastly, after the vehicle is turned off after driving, i can hear the vehicle releasing air pressure from the compressor i presume? Is this normal

TIA

 

Typical rover stuff. My “tyre” light stays on all the time. “Low Coolant” comes on regardless, and yes, the suspension does goofy things after you exit the car.

but hey, it least you know you got a genuine rover instead of some reliable Toyota with rover badges.

 

I doubt its a dead cat. Cat failure is not at all common on modern vehicles. I would replace the downstream O2 sensors first. And if you it is a bad cat, no you can not drive its entire life on one as the bad one would start to clog up and cause massive restrictions. Dont go to that shop anymore.

Did you check spare tire pressure?

Air release is normal, usually a "poof" from the exhaust. Heck, it may doing it up to two hours after parking if it needs to level a little.

 

In addition to what Dakota Travler mentioned, catalytic converters have O2 sensors before and after the cats (on my 2007 gasoline V6 LR3). The before O2 sensors measure the fuel/air ratio of the combustion process and add more/less fuel to the engine via the ECU thus affecting fuel economy and performance. The after cat O2 sensors basically measure cat performance but do not change any fuel parameters to the ECU so they can be left alone, even though the "check engine" light is on. The tire pressures are indicated on the sticker on the driver's side door pillar, if they are different then the tire pressure light will come on or else one of your TPMS sensors is defective. As far as the EAS is concerned, the suspension is always being adjusted to level the vehicle and if there is an air leak then it will be adjusted to compensate, checked by the BCU 2 hours after engine shutdown and then every 6 hours after that until your battery dies. That's my understanding of your questions, am sure others will chime in with additional info, welcome to LR3 land!

Aha! The (if it is truly fake) "low coolant" alarm message is of course the waterlogged float in the coolant reservoir (common), which I have chosen to ignore. Of course one could spend some big $ replacing the reservoir, but am using that cash to replace my basement flooring after an unfortunate hot water tank incident...

 

I'm going to disagree with the Catalytic Converter Issue. We have done many of the "other" fixes to get rid of Converter codes (P0420 and P0430) and eventually end up replacing the converters anyway to make the codes stay gone. As far as driving it until the wheels fall off, that I do agree with. There are two types of converter failures: Plugging and loss of efficiency. They are not the same. Plugging usually occurs when a fault occurs (extreme swing in fuel mixture, misfire, etc...) that causes the converter to get so hot, the honeycomb shaped substrate burns/melts and flow becomes greatly restricted (plugged). The other cause of failure, is loss of efficiency. That means for whatever reason, the precious metals no longer react properly with exhaust. This could be due to age, coolant/silicone poisoning, etc... Loss of efficiency doesn't restrict flow and therefore, just causes a Check Engine Light.

Even if you had a scanner that would clear the Tire Monitor faults (OBD II won't do it), it would quickly return as that system is continuously monitored and when there is a fault in the system, the fault code will come back.

 

I used the Gap IID tool to disable the TPMS, no more warnings for me

 

^^ This ^^

TPMS sensors usually die by year 10-11. Must replace or disable.

2 advantages to disabling:
1. the $ you would have spent on new sensors can help pay for the IIDtool
2. you can oversize your tires and air down without dash warnings

 

Where is the submenu for TPMS? I am pretty new to the IIDTool BT and can't find TPMS in the manual. I'm pretty sure I have a dead sensor in one tire and am not very interested in replacing it at this time, perhaps at the next tire replacement. Thanks in advance...

 

It’s under car config if memory serves me

 

FWIW If you don't have an IIDTool to turn off the low coolant light, take the connector off the bottom and cut it off, strip the wires and connect them. Solder and some shrink wrap makes the light go away.

Same for brake pad sensors. I don't replace them. Just short them out, and inspect pads every oil change.

Low coolant warning is also in the CCF section in the IIDTool

oh. lol. I've got 215k miles on my 08' SC with both P0430 and P0420, cat deficiency on both banks.

since I only drive it on my personal property I use o2 spacers to keep them away. Then it will pass emissions. Don't worry I don't drive it to emissions with the spacers, I trailer it. I just want license plates on it so it doesn't look abandoned. It's great for going up and down the driveway. Remember, o2 spacers are for offroad use only.