4Runner/GX470 :: Service Engine Light Is On / Defective O2 Sensor
Oct 3, 2012
2004 Toyota Forerunner, SR5 with V-6. The service engine light is on. It was diagnosed at one of the local chain parts stores as having a defective
O-2 sensor. I learned this vehicle has two sensors. The first is before the catalytic converter (the engine side). The second is after the catalytic converter (tail pipe side).
When I was under the car I saw the front sensor had evidence of minor leakage around the threads. It appeared to be a fluid stain. ??? Is there a way to determine which sensor is defective and needs replacement.
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My check engine light comes on in the morning (P0335 - crankshaft sensor) and will sometimes go out in the afternoon (after driving for a bit. I replaced the crankshaft sensor (figured what the heck) but didn't cure the code. Puzzles me with the on and off check engine light.
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Some background. I have a 1998 Toyota 4Runner V6 2WD with about 150,000 miles. A few months ago the check engine light was flashing when I am travelling over 70mph. The dealership said nothing is wrong when I asked them to look into it. But I didn't get any codes from it. I read on-line that it could be a possible misfire so I changed the plugs and wires.
A few weeks ago, the check engine light came on and stayed on. I took it to a dealership to diagnosis the problem, they came up with Mass Air Flow sensor was shot. I replaced that, and reset the computer. It still comes on and flashes at highway speeds. I bought a low end computer to read the codes.
I got P300 (Random/Multiple Misfire), P302 (Cylinder 2 Misfire) and P305 (Cylinder 5 Misfire). Cylinder 5 has the coil-pack and Cylinder 2 has the wire coming off the coil-pack for Cylinder 5. So I replaced the coil-pack. The light is still coming on and flashing. How to stop the light from flashing. It comes on only when I am travelling past 70MPH. I have tried just rev'ing the engine up to the same RPM's as I am running when doing 70, but the light doesn't flash then.
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1989 toyota 4runner. O2 sensor is bad and has the check engine light on. No need to spend $100+ on the sensor. Is there a way to disable it so the light goes off?
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02 4runner starts and when temp start to warm kills. Car is dead. No lites, battery dead. When engine cools, power returns and lites work and engine starts normally. Problem repeats. Replaced battery and alternator.
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89 4Runner, V6 having trouble on the start up. Seems worse on the cold start after the engine has been left idle overnight or after my shift at work. I just re-cleaned my connection to my positive post and it's nice and tidy lots of spark on the meter guage but when I go to turn it over just a click. Both the box inside the cab by the front quarter and outside I can hear clicking but just a single click no solenoid for the starter tapping away. Every once in a while it will start to pick up but it seems it's got no power and then nothing back to the single click. It's even hard to jump start at this point.
Could this be the start of my starter going? The bushings going? After I get it going and drive around to where I have to and try a restart it seems to pick up just fine.
I am due to have my timing belt and cam seals done soon could this have any effect? I just had my distributer cap and rotor done and new plugs.
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I'm having some serious trouble with a 2000 4Runner with the 5FVZFE V-6 with 165,000mi. The engine is bogging down/ sputtering and dying on startup, won't drive over apx. 20-30mph, doesn't seem to want to shift up or down, and won't rev past 3000rpms, stopped or driving. I've been a mechanic for awhile and never seen this issue before. But here's the kicker... I'm in bfe Afghanistan, have almost no access to parts (if I do it takes quite awhile to get them and even the easy stuff is hard to find), no diagnostic comp, and only the tools in my toolbox, air compressor, and solvent tank.
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WHen i open the back hatch, the light does not come on when the switch is on door but if i flip it to on it works fine...
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I have a 2003 V8 4WD SR5. It has 109K miles and I replaced the pads and rotors and front calipers about 8-10K ago. Since then it has been doing fine in the brake department.
This morning, the brake warning light (the parking brake light) came on about half illuminated. The parking brake is not on and when I press the parking brake it illuminates fully. The other warning lights associated with the brake system (VSC TRAC OFF, VSC OFF, and ABS) are not illuminated. The fluid is at the max line, if not a bit above.
Given this info, I don't believe there is a major problem or else it would actually be fully illuminated and the other lights would be on as a result of the brake light. I am just curious what is causing this issue and how to fix it.
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I was flushing the radiator on my 1995 V6, 3 Liter, 5 speed. And absent mindedly, I fired up the engine for a minute to "flush" it out, but hadn't put the water/flush in it yet.
Now, the check engine light is on, it idles at about 2000 RPMs and spits smoke. I haven't run it more than 5 minutes total like this. I refilled the radiator, fired it up, no better. I drained that and tried again, but still no better.
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I have a 98 4 Runner the fuel light has come on, the fuel gauge itself is working fine. The low fuel indicator light stays on even on a full tank, would like to know if there is a reset button or is it attached to the fuel sending unit or is it a separate unit....
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I have a water leak in a 1990 4runner (3vze) at the back of the block i called the dealership and they said the headgasket had been done, i noticed this leak because the water is well orange rust colored to be exact my 4runner needs a new radiator but that's kind of self defeating until i fix the leak at the back of the engine, what it could be? or how to check if its the headgasket, the oil doesn't appear to have any water in it,i believe it's coming from above the head but there isn't much clearance between the injector plant and firewall.
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I have an 1990 Toyota 4Runner. V6 engine. Automatic. 4wd. Today it blew an upper radiator hose. A few seconds after the initial pop of the hose and the spew of fluids the vehicle died. I replaced the upper radiator hose and the lower hose- and refilled the antifreeze. There are no leaks as of right now.
The engine will not start. The belts spin whenever the key is turned on. But the engine will not crank. You can hear the starter trying to start it up. Jumping the vehicle was of no luck. Charging the battery was of no dice.
The vehicle makes a whirring noise (belts spinning) when key is turned, but the engine does not crank at all. The noise stops as soon as you shut the key off. The oil is clean and full still.
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I have a 92 4runner with v6 5speed Manual tranny it has the A.D.D hubs ,when I put it in 4wd its not going into 4wd the 4wd indicator in dash is not coming on ,that could be a bad bulb cause it doesn't come on when you turn key on.The transfer case is working all right .Its something in the front end that's not engaging .I noticed on the front diff. there is some kind of solenoid there with vacuum hoses and a electrical connection .Does this have anything to do with it not locking into 4wd?
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on a 93' 4 runner that will not engage 4 wheel drive. The 4 wheel manual shifter works fine, and the linkage underneath looks fine; however, the indicator does not light up - and it definately only has rear wheel drive.
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I have a problem with my 4runner, it ran good when I drove it before I deployed, not I got back and it will not run, it starts for about 30 seconds then dies, sounds like something is killing the fuel, I took the cap off the tank to see if it was clogged, but thats not the problem, it just will not stay running for longer than 30 seconds. Also I realized that the alternator was very hot for the 5-7 times I started it and had it run for 30 seconds? Oh it's a V6 3.0L 5SPD manual 4X4 by the way.
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we have just pulled out head resurfaced and put engine back together now it won't start tried the timing and checked for fuel but wont start the only way it starts now is with brake fluid in the intake but that only fires up and won't stay idle.
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I've noticed that my brakes are very sensitive lately. I'm wondering if it has anything to do with the differential oil that got on the rear pads when the rear seals blew out about 3 months ago. The shop cleaned them off but they still looked oily to me. I'm also wondering if it is parking brake related as one or both of the bellcranks are frozen (there's no cable sag, but one of the stops has a gap and the parking brake doesn't work). Or is it brake fluid related. I am years past the point of needing to replace the brake fluid and bleeding out the old fluid.
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The transmission went out on my toyota 4 runner ...
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I have a 93 4Runner, and it won't start all it will do is turn over, But won't start, my dad has tried everything we could think of It has gas, an new battery and new battery cables...
What is the location of the MASS AIRFLOW SENSOR, AND THE MAIN COMPUTER...
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The son inlaw just bought a 86 4runner. It's been beat pretty good but I know Toys are good for it. My question is, it rev's just fine in every gear but 5th. Going down a flat highway and in 5th it won't rev over 2500 no matter how much gas ya give it. It has a 22re and 31-9.50's under it. My daughter had a 86 p/u with a 22r (I believe) and 33-10.50's and it had no problem hitting 90. Is there a limiter on these things? Thought i'd ask before chasing vac lines.
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