Can't Pass California Smog!
#1
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I have a 2000 LR Discovery II that has had the SES light on for a year. Was told that I needed new cats. Had the cats changed, both OEM and used from another Disco2, but the problem remains. Engine is running very rich to the point that getting less than 10 mpg. Vehicle has 310k miles, but other than the cats and O2 issue, it's unbelievably a fine car. Can anyone help? Thank you in advance.
#2
#3
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Tune up (plugs and wires), premium fuel not from Joe's Gas and Groceries but from a name brand, like Shell, Mobil, etc.
New front O2 sensors, clean air filter, reset the check engine light, drive for a tank of gas, fill back up with premium and add this, and once you hit half a tank take it to be tested.
New front O2 sensors, clean air filter, reset the check engine light, drive for a tank of gas, fill back up with premium and add this, and once you hit half a tank take it to be tested.
#4
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Tune up (plugs and wires), premium fuel not from Joe's Gas and Groceries but from a name brand, like Shell, Mobil, etc.
New front O2 sensors, clean air filter, reset the check engine light, drive for a tank of gas, fill back up with premium and add this, CRC 05063 Guaranteed To Pass Emissions Test Formula - 12 Fl Oz. : Amazon.com : Automotive and once you hit half a tank take it to be tested.
New front O2 sensors, clean air filter, reset the check engine light, drive for a tank of gas, fill back up with premium and add this, CRC 05063 Guaranteed To Pass Emissions Test Formula - 12 Fl Oz. : Amazon.com : Automotive and once you hit half a tank take it to be tested.
Thanks a bunch. Will definitely try your suggestion. Already spent enough with the stealer to buy a used sub-compact trying to get this fixed.
Will also get codes to post in the event someone has seen this problem before. Again, thanks.
#7
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To answer your questions Mike, after paying the dealer, then a dealer moonlighting mechanic, then an independent service shop to fix the problem and none were successful, I'm broke!
The codes are: P0161, P0130, P0154, P0139, P0171, P0140, P0141, P1174, P1171
Thanks guys. Really appreciate you taking the time to think about this.
The codes are: P0161, P0130, P0154, P0139, P0171, P0140, P0141, P1174, P1171
Thanks guys. Really appreciate you taking the time to think about this.
#9
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All that to me says air metering issue. Either unmetered air is entering after the MAF, or the MAF itself is bad.
Check all of the seals and clamps from the airbox to the upper intake, and also check for vacuum leaks. If you can confirm that there are no vacuum leaks, then the next likely candidate is a dirty or failing/ failed MAF.
On cleaning the MAF, follow these instructions:
Discovery 2: MAF cleaning instructions - 4x4 Community Forum
Using this MAF cleaning spray:
![](http://b.vimeocdn.com/ts/309/477/309477850_640.jpg)
MAKE SURE YOU ONLY USE MAF CLEANING SPRAY AND NOTHING ELSE or you will likely ruin your MAF.
Check all of the seals and clamps from the airbox to the upper intake, and also check for vacuum leaks. If you can confirm that there are no vacuum leaks, then the next likely candidate is a dirty or failing/ failed MAF.
On cleaning the MAF, follow these instructions:
Discovery 2: MAF cleaning instructions - 4x4 Community Forum
Using this MAF cleaning spray:
![](http://b.vimeocdn.com/ts/309/477/309477850_640.jpg)
MAKE SURE YOU ONLY USE MAF CLEANING SPRAY AND NOTHING ELSE or you will likely ruin your MAF.