So, I replaced front o2s Saturday and code p0134 came back today bank 1, sensor 1. the other codes, which have to do with sensors of one kind or another, came on at the same time last week as the o2s --- I just decided to start with them. These codes popping up all at once.... Is this suggestive of one underlying problem or do all these sensors need replaced? Seems like one thing could trip all of these codes?

I noticed the engine doesn't fire right up like it did before the codes were thrown, too.

So the o2 sensors needed a replacement but I am not sure if I should start replacing these others sensors now since the 02 sensor code came back. What do you recommend? Also, I see in earlier posts mixed reviews on whether it is okay to clean the MAF or just replace it with another Bosch?

Thanks for any help you can share......


Best!

 

Well the first question I have is what codes do you have?

All of them.

 

So here are all my codes - the upshot is they all came on at once last week after driving home from work. I started by replacing both front-O2s. Codes went away for a couple of days and they came back on. So now I don't know what my next step would be - buy MAF, Purge Valve - but seeing that my new O2s didn't do the trick - not sure throwing money at these other parts will have any impact. Any suggestions?


P0134 - O2 Sensor Circuit No Activity Detected Sensor 1 Bank 1
P0135 - O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1
P0154 - O2 Sensor Circuit No Activity Detected Bank 2 Sensor 1
P0155 - O2 Sensor Heater Circuit Malfunction Bank 2 Sensor 1
P0102 = Mass Airflow Circuit - Low Input
P0445 - Evaporative Emission Control System Purge Control Valve Circuit Shorted
P0448 = EVAP system vent control circuit shorted
P0340 = Camshaft position sensor circuit malfunction Open/short circuit to vehicle supply or earth.
P1884 = (37) CAN message: Engine air intake temperature invalid No apparent effect. On Off.

 

I have all the same codes! Would love to figure out why they came up

 

Sounds like the O2 sensors were not the cause.
You were getting codes for them because another part was causing a rich and/or lean condition.
A mass air flow sensor can definately cause that, but I will not say for definate that is your problem.
I am new to Land Rovers, but not mechanic work.
I am chasing an electrical gremlin in my 04 now.
I get different codes depending on what mood the truck is in.
Good luck with it!

 

I’d start with the MAF & CPS (or CPS wiring), with those acting up it’ll cause all sorts of problems down the line.

 

I would start with the following:

What O2 sensors did you get, part number

Clean MAF, do not replace. Reset codes and see what happens

If codes come back, clean the gas cap and spout with 3m scotch brite. Reset codes and see what happens.

provide the part number for O2s
Report back if cleaning MAF worked
Report back if cleaning the gas cap and spout worked

If those didn't work let's start on the next item.

 

back from the dead. new here and I have the same exact codes. just ordered a new OEM gas cap and MAF and will report after I slap them on. hopefully this is the issue. also noticed a crack on the air intake box that leads to the maf. gonna try that first

 

I always that that generally air leaks upstream of the MAF shouldn't cause an issue but not 100%

 

What year is your Disco? Do you have SAI on your Disco?
Check the 15A F2 fuse in the engine bay. I bet it's blown.