Ok letme explain, i know my English is no that good but i don't have any other options!!!! I purchase my truck in 2007, she was fine untill i started off roading and going tru water etc. one day i was on deep deep water and i mess up the mass air sensor then the light came on, so i take the truck to advance an got the codes read, the guy tell me 02 are bad, i said ok fine, and got all 4 new from atlantic brit, then the same day they arrive i put them on, the light was gone for a week, afther a week the light came back on, this time i take to my cousing to get the codes read again, he tell me the mass air sensor was bad it was one storage code, i said ok letme get this sucker new, i put a new mass sensor th light was gone for a week and then back, I said letme buy an obd2 scaner with real time live, so now it's been about 2 years with this light on, so she idle ok rough some times but shes fine, well i took my truck off roading the otre day i went tru water "AGAIN" but this time i got a snorkel, ijjijiji so i step on the gas and hit the water splash in to the water and the i was going out and the truck loose power bad but never a missfirer was present, so i pick up the 0bd2 code it was p1590 said rough terrain, then the idle was worse than ever, i got home and pull the computer out and clean and file all the connectors to make sure i'm getteing full contac and boom fix's the idle right away but still getting the light on.... now before all this off road adventure i was getting this o2 2/2 malfuncion and o2 2/1 malfuncion, now they are fine but i'm getting the same codes on the other side of the engine..... I'm thinking wtf, you know!! thats crazy and the bank 2 now work fine and the problem is bank 1 sensor 1 and 2, the today I discover the front o2 wich is bank 1 sensor 1 i'm getting 1.125volt no mater wat a do i get the same reading from that sensor, the if i disconnected sitll get the same reading, so i started to move just the cable and the numbers start going down untill reach 0.450 then connect the sensor and is working fine but the scaner still read sensors malfuntion.... this light will come back later so me question is this: On the wire harnes from the computer to the o2 sensors, those wires are one pice from the computer to the o2, bcz i need to know if they are more connector that can be malfuntion due to water you know.........Is making me crazy!!!!!

 

ok I only got through about half of that but when's the last time you've changed spark plugs and spark plug wires?

 

Give us the actual codes.

 

where did you get the MAF sensor from? it has to be a Land Rover specific MAF from Bosch in the Land Rover box, the computers on these trucks are very sensitive. I think your O2 sensors were OK and the water in destroyed the MAF which made the codes come on to look as if the O2 sensors had failed. how many miles are on your truck? are the TC HDC and ABS lights coming on? when was the last time you had your brakes done?

 

1590 is a rough road sensor code. usually comes with 3 amigos but can be an electrical short. i have 1492 its a wonderful mystery yet to be solved.

 

95% of O2 codes on Land Rovers is because you need a tune up.
New plugs and wires are what you need.
DO NOT buy your plug wires from Advance Auto.
Get the Magnecor plug wires from www.apexperformance.net
You can buy your spark plugs from Advance but NOT the plug wires.
I use Iridium plugs.

 

LOL, Thanks!!!!! MMMMmm letme see, Ok Spark plugs i replace about 2 years, ignition wires never but they are fine i check those wires with the engine runninig in idle on a very dark place and there is not sprk jumping from place to place so i'm ok with the wires, I did replace the ignition coils about 1 monht ago!!!

 

Really? mmmmm!!! I replace the oil about 6 monhts, and i put about maybe 8ooo miles on this oil, I always use syntetic 10w40 and a knn oil filter

 

Mass air sensor i got from rovers land new in a box, it was a bosh brand. And i got the 3 enemis on my dash board, i have newer done a brake job, the rear pads are almost gone, they got like 1/4 pad left on the rear pads, the front pads are like half way gone, brake disks are fine, no bibration under breaking.....

 

Lol 1492 ??? ijjiijijij and no one knows about this code?