| Author | Message | ||||||
     gregory gibbard (Fj40) New Member Username: Fj40 Post Number: 1 Registered: 01-2004 |
I am hoping that someone may be able to shed some light on the issue of whether or not my O2 sensors and cats are bad. I've had my '99 Disco I for a little over a year, so I'm still quite ignorant to its ways. Back in the fall, while sitting in line at the border waiting to come back home, the check engine light came on. So being the caring one that I am and quite green with Rovers, took it to the dealer to see what was wrong. $200 later, they told me that my catalytic converters were bad and that they wanted $2,700 to take care of the issue. However, the techs said they could reset the light, and that I may be able to get some more mileage out of them. Of course, I said fine, and ever since have been trying to find the best price for Cats and O2 sensors to do it when the time comes. A couple of months have pasted since then, with no issues until...As my luck would have it, while on a recent trip to do some winter camping in Ontario, the check engine light came on. The truck had been running fine up until about 2 days before the trip. I had noticed once that at about 50mph it the truck seemed to run almost rough (like it was being choked while accelerating). It did this for about a quarter of a mile and then was fine again. I noticed this on the occasion when the CE light turned on in Canada and it has repeated this trick about a half dozen times since then. Other than this it has been seemingly running fine. The thing that I'm wondering is how do I know if this might be the Cats or perhaps bad O2 sensors. I haven't really noticed a major demise to the gas mileage. (I did purchase O2 sensors based on a friends recommendation and am waiting to try that first before putting the cats on. Of course the O2 sensors that were sent were wrong.) Has anyone else had issues like this or any suggestions? I have heard that if the Cats are bad, it is usually an indication of some other problem. thanks, greg | ||||||
| David Huddleson (Dhuddleson) New Member Username: Dhuddleson Post Number: 18 Registered: 09-2003 |
Check the thread called "Check engine light after log drive?" as it sounds similar: ../2/42124.html"#333333"> | Steve McDonald (Smcdonald) New Member Username: Smcdonald Post Number: 8 Registered: 01-2004 |
coverters are covered up to 80k. but as mentioned i would also look into the o2 sensors. how many miles on the vehicle now? | ||||
| gregory gibbard (Fj40) New Member Username: Fj40 Post Number: 2 Registered: 01-2004 |
Thanks for the advice. I'll get my truck back into the service shop that was going to put the o2s in to see if they can check for the codes. Unfortunately, I'm the 3rd owner of the vehicle and since i've got 93,000 on it, I highly doubt that there is any warranty there. I'll check the thread you recommended and will let you know what happens. greg | ||||||
| gregory gibbard (Fj40) New Member Username: Fj40 Post Number: 3 Registered: 01-2004 |
I finally got the truck into the garage Thursday morning. Fault codes read: P0300 (Misfire on Multiple Cylinder); P0303 (Misfire on Cylinder 3); and P1316 (Misfire Excessive Emissions Fault). Initially the garage tech had told me the issue was "No Ignition Coil Activation Fault Coil 1," which I had found he must have made some mistake and because that is fault code P1361. Almost a $600+ error if I hadn't had double-checked the codes before trying to buy a new coil bank. Luckily they're on back order. Anyways, I called the dealership and tried to figure out what "Misfire Excessive Emissions Fault" really meant. They told me this is a general fault code and that it could possibly be plugs, wires, coil, or sticky valves. I told him that I had changed the plugs only two days before the light had turned. They said that the Bosch Plantinums that I had installed might be part of the problem. Swapping out plugs is the cheapest route at this time. Is there an easy way to reset the (Idiot) check engine light, other than going to the dealership and spending the required $100? I've read some threads about it, but they all pertain to older OBD I systems. If anyone has any suggestions, I am definitely open. Thanks, greg | ||||||
| James Anderson (Jnjander) New Member Username: Jnjander Post Number: 32 Registered: 08-2003 |
Disconnect the battery for 10 seconds. You'll loose the radio presets and the heat/ac will go back to c instead of f, but it saves $100. I have a 99 Disco II as well, that will do it. | ||||||
| Joey (Joey4420) Senior Member Username: Joey4420 Post Number: 534 Registered: 04-2003 |
You can also go to just about any auto part store and ask them to check you codes and clear them.....Autozone comes to mind. | ||||||
| gordon sitts (Gsitts) Member Username: Gsitts Post Number: 80 Registered: 10-2002 |
I'm interested in your initial description on the problem regarding waiting in traffic. I get an o2 sensor code on my 1996 if I let it idle a long time as in traffic. I replaced both front o2 sensors but still get it occasionally. I would like to know if anyone knows which code is which sensor p1185 thru p1189 so that I can narrow the prob down further. Like you my d1 seems to run just fine and still gets the same awful mileage.Good Luck Gordon | ||||||
| charles pastrano (Charles) Senior Member Username: Charles Post Number: 377 Registered: 08-2002 |
Gregory, I am betting the VSS is about to go. Cats should be fine unless you hear rattling. If you needd replacements, aftermarkets should run $150 installed per side at most muffler shops. O2 sensors call nathan formerly discount rovers they are about $125 each. You can do it yourself. | ||||||
| Joey (Joey4420) Senior Member Username: Joey4420 Post Number: 535 Registered: 04-2003 |
I read somewhere awhile back, that some OBDII readers show O2 sensor issues, when in fact it is a MAF sensor....If I recall correctly I had the service guy (Not the manager) confirm this. | ||||||
| gregory gibbard (Fj40) New Member Username: Fj40 Post Number: 4 Registered: 01-2004 |
the saga continues...I've changed the plugs (taken the month old platnums out) and put in some inexpensive, standard autolite plugs. The truck is running fine for now. So far I've had no success with trying to get the codes cleared to see if that is resolved. The first place I went to last night, AdvanceAuto didn't have the correct adaptor to read the codes and then in my attempt at Autozone this morning was told that they can check my codes, but they can't clear them. "It's against State law," the guys says. I've also tried disconnecting the battery as suggested. Perhaps that works on the D2's, but not on '99 D1's. Hopefully, I can talk the guys that looked at it the other day to do it. I was just reading another set of old threads, trying to find out exactly what the VSS(Vehicle Speed Sensor) and MAF (Mass Air Flow), and read about disconnecting the battery for a couple of hours. At this point, I'll try almost anything. I can't wait for spring time to get out the old Cruiser. Life and repairs are much simpler with that. Anyone want to trade a Series for Disco? | ||||||
| gregory gibbard (Fj40) New Member Username: Fj40 Post Number: 8 Registered: 01-2004 |
finally, the CE light is out, my new plugs are in. The guy at garage that is just down the street from the house cleared the codes out this morning. So far so good. I drove the 15 miles to work with one eye on the road, one on the dash and fingers crossed. Hopefully the $15 bucks spent on plugs takes care of the issue. I'm sure I'll find out soon after I send back the O2 sensors I had ordered. | ||||||
| charles pastrano (Charles) Senior Member Username: Charles Post Number: 378 Registered: 08-2002 |
If the sudden loss of power around 50+ it is the speed sensor. MAF should be fine. |
