| Author | Message | ||
     Jordan Pettigrew (Klecko) Member Username: Klecko Post Number: 43 Registered: 05-2003 |
Since i've had my 98 disco I have always had a recurrent problem with check engine light/o2 sensor code. It seems as though after long drives on the highway(2hours) the light will come on. It will stay on for a week or so and then go out. Another long drive it comes on. I have replaced the 02 sensors 2 times. Once at my expense and the last at LR expense. Most recently the checke engine light had come back on and for some reason after a carwash with extensive undercarriage spray the light instantly turned off when the truck was restarted. There has never been any change in performance with the truck and I have finally gotten used to driving with the light on for long periods of time although at first It caused some sleepless nights. Any ideas? | ||
| Robin Cooper (Cooper1) Member Username: Cooper1 Post Number: 72 Registered: 12-2003 |
Check engine could be your cat. convertors. just a thought. how many miles are on it? | ||
| Joey (Joey4420) Senior Member Username: Joey4420 Post Number: 735 Registered: 04-2003 |
I would agree with Robin on this. If the light comes on after a long drive, that would tell me the Cats are starting to plug up. Depending on the mileage the cats will be under warrenty till 80k, as per federal law. I would go to an independent Muffler shop and have then test the cats (after a long drive to the shop). If they fail, get it in writing and take it back to the LR dealer and then insist on getting your money back for the O2's that you didn't need to buy. | ||
| Beau Campbell (Bcampbe7) New Member Username: Bcampbe7 Post Number: 30 Registered: 03-2004 |
Joey- Is that Canada's Federal law or the US? Beau | ||
| Joey (Joey4420) Senior Member Username: Joey4420 Post Number: 738 Registered: 04-2003 |
hmmm good point, I know it is a US law. Not sure about Canada. | ||
| Joey (Joey4420) Senior Member Username: Joey4420 Post Number: 739 Registered: 04-2003 |
Emissions warranty in the US. The Defect Warranty is generally consistent with the manufacturer's bumper-to-bumper warranty with certain parts (catalytic converter and electronic emissions controls (PCM) for up to 8 years/80,000 miles. Please refer to your owner's manual for your exact coverage. | ||
| Joey (Joey4420) Senior Member Username: Joey4420 Post Number: 741 Registered: 04-2003 |
Beau, I just checked with the person who runs www.lemonaidcars.com and he informed me that Canada does offer the same Emissions warrenty that the USA offers. He basically said to go to any Car dealer in Canada and you can get this info from them. | ||
| Kris Carlquist (Kris_carlquist) New Member Username: Kris_carlquist Post Number: 32 Registered: 09-2003 |
So if the cat is plugged up, the code would be for the 2nd sensor correct? I notice a lot of the codes are for the first sensor, the P0130 code, which I think is bank 1 sensor 1, right? I don't know if that is the case in this instance, but that is the code thay my disco throws the most. Whether it is due to bad gas, a fuel supply problem etc. I really don't know. Do the cats need to be checked if a guy is getting the fault on the 1st sensor? Just curious. | ||
| Kris Carlquist (Kris_carlquist) New Member Username: Kris_carlquist Post Number: 33 Registered: 09-2003 |
okay, nevermind the last post, I went and pulled codes again, I guess the P0130 is just the general code for the O2 sensors. My software pulls each sensor individually. I just had another code, it looks like the bank 1 sensor 1 is not transitioning fast enough, could this be a plugged cat? I am new to OBD2 so I am still learning all this. sorry about the confusion. | ||
| Joey (Joey4420) Senior Member Username: Joey4420 Post Number: 744 Registered: 04-2003 |
Kris if it is the front sensor, then it is probably not the "Cat" On the other hand since you have already changed the O2 twice before, I doubt it is the O2 sensors either. I would start thinking along the lines of something on Bank 1 causing the problem. I would start by looking at plugs on bank 1 (if I recall correctly that is drivers side) check the plugs for build up, make sure you don't have an exhaust leak on that side, pull the O2 sensor and look at it for build up. Make sure the top of the O2 sensor (the part you can see when plugged it) is not covered in oil or grime. Here is a good site explaining O2 sensors and what can cause them to go bad. http://www.parttrackers.com/library/1/24/27/ | ||
| Orville Hrabe (Oshrabe) New Member Username: Oshrabe Post Number: 14 Registered: 01-2004 |
Got a question - That link at part trackers suggested if one injector is clogged, then the O2 sensor will cause the mixture to go rich. My 96 D1 is running very rich, even though I replaced the front O2 sensors last week. Gas milage went from 15 to 10 also. Any ideas? Thanks. | ||
| Joey (Joey4420) Senior Member Username: Joey4420 Post Number: 753 Registered: 04-2003 |
If you are not getting any codes, then it could be an injector, but I would want to rule out the MAF as well, since it does control the air to fuel ratio as well. I remember talking to my LR tech about O2 sensor codes, and he told me alot of time the OBDII readers will say O2 Sensors, when the Testbook will say MAF. Maybe a trip to your local mechanic with a good OBDII reader (one that shows fuel mixture and graphs) may be in order. | ||
| Kris Carlquist (Kris_carlquist) New Member Username: Kris_carlquist Post Number: 36 Registered: 09-2003 |
My software actually does show mixture and it graphs, I am still just learning how to use it. I would not be surprised at all if I have a bad spark plug or plugs. I have been meaning to pull them and look. Just recently the Disco started using a great deal more oil. This is largely my fault. My wife is the one who drives it on a regular basis, and she really doesn't think about, or is in too big of a hurry to check the oil when she fills up. On the positive side, she does change the oil herself. Anyway, long story short, she let it get low for several oil changes in a row, and I think now I probably have some fairly significant scoring in the cylinder walls. I only noticed because I went to clean up her used oil and noticed the drain pan was really light! I drained it back into the bottles and there was less than three quarts. In an engine that should have 6.5 quarts, I am sure that is not even close to enough oil for the crank to sling on the cylinder walls. My recent O2 problems are probably only an indicator of the slow death my block is suffering. I am just trying to hold out until Bosch comes out with a 4.6 short block. I heard a rumor from the dealer indicating that should not be too far away, since the DII's now have the 4.6 and there might be enough demand to make it profitable to produce. If I can just hold out long enough, my 4.0 may not have a lot of life left in it. What effect would oil have on the O2, I suspect it would kill it? | ||
| Joey (Joey4420) Senior Member Username: Joey4420 Post Number: 754 Registered: 04-2003 |
Yes, oil on an O2 sensor can kill it in a matter of hours. So, if you are burning oil, first the O2 sensors, then the "Cats" will soon follow. They don't like oil either. | ||
| Kris Carlquist (Kris_carlquist) New Member Username: Kris_carlquist Post Number: 37 Registered: 09-2003 |
That is what I figured. I will just have to keep nursing it along. I know that antifreeze kills them quicker than quick, so it makes sense that oil will also or any liquid for that matter. I will have to check the plugs on that side. and make sure I don't have a cylinder that is particularly bad. It runs good, but the CE light is getting a little too much exercise. | ||
| John S. Bleazard (Injun) Member Username: Injun Post Number: 74 Registered: 12-2003 |
I have this very code on my 98 D1 and I have already replaced the o2 sensor on the drivers side up stream port and still get the code. After discussions with others on this board, another possibility you may want to consider is the fuel filter and fuel pump. I plan on replacing the fuel filter this week to see if the transition numbers improve, worsen, or remain. | ||
| Kris Carlquist (Kris_carlquist) New Member Username: Kris_carlquist Post Number: 38 Registered: 09-2003 |
I tried the fuel filter, but old man corrosion is currently fighting a winning battle. I am picking up the fittings today, so I can cut out the old filter and splice in new fittings to mount the new filter. The filter was actually my first suspect. It just didn't want to come out willingly. Hopefully I will get it out tonight. I am going to pull all the plugs too and see how they look, as well as install a new air filter. |
