RangeRovers.net Forum banner

1 - 7 of 7 Posts

Registered
Joined
8 Posts
Discussion Starter #1
Hi everyone,

I'm new here and I'm new to the range rover world having bought a 2002 L322 4.4 V8 a couple of months back.

The car started idling very poorly and with the windows open you could smell exhaust fumes/fuel and the EML was on.
I had the codes read and I got p0171 and another which said bank 1 sensor 1 was faulty.

After speaking to a local land rover specialist he said change the MAF and see what happens so I did and it made no difference. I then changed the O2 sensor and upon starting the car it idled perfect but after a few seconds it said engine failsafe program on the dash and the engine was slow to respond to the accelerator pedal being pressed.

I re read the codes and it came up with p0171 again and no others. I had to leave the garage so I drove it home in failsafe mode and when I pulled on my drive I turned the car off then went to restart just see if anything had changed and it started but the revs we're jumping all over the place with hardly any response from the throttle when pressed.

I left the car a while and I've just been to restart and it starts then dies straightway and makes no difference if I press the accelerator or not.馃槥

Any ideas guys, all I can think is it's either a faulty o2 sensor I've bought or god knows!

I'm going to put the old sensor back on tommorow and see if it goes back to how it was before unless I get told different.

Thank you
Andy
 

Premium Member
Joined
2,467 Posts
You have a couple different issues.

Idle jumping around can be something as simple as the throttle position not being learned, which you can 'fix' by yourself, disconnect the battery, short out the leads(hard reset) hook back up. Then turn the key on, but do not start, let it sit for 5+ seconds, turn off, and repeat one more time. Then start it up, the idle should be fine now, if not, you may have a throttle body issue.

P0171 is a Bank 1 Lean fault, which could be caused by the O2 sensor, or a vacuum leak, or fouled injectors, or many other possible things, including the MAFS. Which side O2 was replaced?(left or right when sitting in the vehicle, as I'm guessing you drive incorrectly on the right side of the car)

Can you find out the fault code(Pxxxx) that was there for the O2 sensor?
 

Registered
Joined
8 Posts
Discussion Starter #3
The code was P0134 for the O2 sensor and yes I am on the right side of the car so the sensor changed was the pre cat drivers side sensor.

I just find it strange that changing the o2 sensor has made it go into failsafe mode and act like it is doing when it has never done anything like that before.

Il do the hard reset later also thanks and hopefully that will sort the idle out.
 

Premium Member
Joined
2,467 Posts
Ok.

The idle issue wasn't caused by the O2 sensor, this happens sometimes if the adaptions are reset, but not allowed to fully relearn, and it can happen after a few drive cycles.

But seems you still need to sort out the 171 code.
 

Registered
Joined
8 Posts
Discussion Starter #5
I've done the rest to no avail and now it's saying air suspension inactive aswell.

I've read the codes again and it's coming up with P1630 which is something to do with DTC?

That was the only code stored when I read it and the car is still the same.

Thanks
 

Registered
Joined
1 Posts
Hi It seems that I have the exact situation, I replaced a sensor now I have a engine failsafe progr? How were you able to remedy your problem?
 
1 - 7 of 7 Posts
Top