2006 Range Rover hse smog problem

[RR06 hse warrior]

I’m having problems passing smog in California due to oxygen sensors incomplete or not ready. I replaced the 2 downstream already and will replace the 2 upstream next. I also replaced starter, alternator, battery, fuel pump and filter, water pump and a lot of coolant hoses. I’m not sure if the 2 upstream will fix the problem, but hope so. Also I hear a hissing sound which sounds like it’s coming from near the EGR passenger side. I also replaced the PCV valve and tried spraying starter fluid to find a leak but no luck so far. Any other suggestions?

 

[RR06 hse warrior]

Update ***
Replaced the 2 upstream oxygen sensors but still shows O2 sensors monitors not ready. All other emissions are ready. Could it still be egr valve if it shows ready egr system ready. I should note I used an OBD II scanner and it doesn’t show any other engine codes. I’m fairly new to all of this and have been replacing quite a few parts and hope to pass smog soon
Thanks any help would be appreciated.

 

[RR06 hse warrior]

 

[Houm_WA]

Have you (also) posted this on the RR message board? This is the LR3 section.

 

[RR06 hse warrior]

Yes.. thank you.

 

[cj60]

Drive Cycle ?
Search or google it.


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[LVDaytripper]

Had a similar issue not to long ago regarding Lean Banks 1 and 2 codes. Replaced MAF sensor, 02 sensors, PCV valve and intake O-rings, cleared the codes and after 20 mins of driving, ding! code came back. Bugged me for a few days then I remembered something about the ecu storing old adaptation values which triggered the original CEL and it will keep referring to it even though I replaced the sensors already. I then proceeded to clear the engine adaptation values and lo and behold, CEL has not come back to this date.

 

[RR06 hse warrior]

I think that’s my next step, replacing the MAF sensor. I haven’t thought about the intake O rings might have to look into that as i already did sensors and PCV valve. When you say clear the engine adaptation values do you mean disconnecting the battery for 10 minutes or so ? Is there a different way to clear the adaptation values? I took to local rover mechanic and he didn’t do much but suggest MAF sensor and said it must be electronics, 200$ later.

 

[LVDaytripper]

Most OBD2 scanners won't clear adaptation values. The ones specifically programmed for LRs will have the options to do it like the ones they sell at Atlantic British for about $400+. It clears engine/drivetrain adaptaion values since the ECU constantly learns and stores how the vehicle is driven and any potential issues that comes up. Before you start throwing parts into it, have a LR independent shop clear the adaptation values if they have a LR specific OBD2 scanner and see if the error codes comes back.

 

[LVDaytripper]

On a side note, if you will wrench on the car yourself and do not mind using a non-branded OBD2 scanner can perform almost all functions a manufacturer specific scanner does, message me for info on the one I use. Don't worry, I won't sell you one, will just give you the info and where to get it.