o2 sensor

hello i have changed nearly every sensor on my 91 explorer. from map sensor to just recentlly my 02 sensor. my check engine light was on,hooked up to machine.it read o2 sensor,so i changed it. the check engine light still comes on and trucks rpms drop really low almost shutting off then revs up...

Hello i have replaced nearly every sensor possible.Computer reads bad O2 sensor,i replace then check engine still comes on in car? When idleing long enough sounds likeit want to stall then revs high? Now i hear a whining sound coming from fuel pump? Any ideas? Thank you

Autozone gave me 4 trouble codes, A week ago it was 2 codes one saying the "ECM has detected a rich or lean air fuel ratio on engine bank two." The other one says. "The computer has detected a rich or lean air fuel ratio on engine bank 1." The truck only starts rough, and idles rough...

So Here's the deal. My father In-Law brought over his 91 Ford Ranger 3.0 XLT for a simple idle issue. While looking in to it, I found a host of issues that I have resolved with the help of these forums and the interwebs. However, many posts I reviewed did not often end with resolutions or feed...

1999 Explorer Sport OHV....the engine hesitates. Symptoms are: - Hesitation while accelerating, especially under load (uphill) - Hesitation is very sudden and jerky, and appears only when engine is hot and has been running for at least 30-45mins on a warm day, longer (2-3 hours) at night or...

So on my 97 Explorer i keep getting codes for banks 1 & 2 too lean. I have tried searching for vacuum leaks with a smoke machine and found nothing. I changed the fuel filter and no change. I hooked up a scan tool with live data and saw my fuel trims were all at -100 and all 3 o2 sensors...

Hello Ford Geeks, I'm new to this forum, so I'm introducing myself, as requested by the forum. I'm not a sporty, off-road motorist, nor Henry Ford throwback by any means-I prefer bicycling to driving on most commutes, and I wanted to find a Toyota Previa-AWD, before settling for the...

I just picked up my 1996 Limited Explorer 4.0 from the mechanic. They claim that getting a p0153 circuit slow response can cause a fuel trim to bank 2 to spike, and cylinder #4 & #6 misfires. Stated that the electronic control module is running the engine too rich, and this can cause one side of...

So I have a 1998 Ford Explorer, 4.0L OHV (VIN X) with 129,000 miles. CEL came on and the idle got rough. Had the codes checked and came up with P0171 and P0174, lean bank 1&2. I replaced the upper and lower intake gaskets as well as the EGR o-ring. While I was in there I cleaned the intake...

ok i have an 03 explorer limited. fuse 41 keeps blowing and the only engine code ive seen is the rear o2 sensor... i replaced both and its still blowing. what could it be? if i unplug the battery for a few minutes and put a new fuse in itll run for maybe 5-10mins before it blows again. ive...

1996 Exploder - engine runs VERY rough, won't idle for long, can't drive. This is my daughter's truck and she broke down at school. I had the truck towed home and found the fuel pump was bad. I changed the pump and checked the error codes. The only code was low coolant temp, so I didn't do...

(this is over a period of about 6-8 months) To keep a long story short, my 93exp started running like crap and went from 20+ mpg to 14. just changed the plugs and wires 2 months prior. I thought it was a plugged cat so I cut the bottoms out of them and took the stuff out, then welded the...

Hello all. I recently bought a ´91 Explorer, and I am having some problems with the engine. First off, when cold it can take a while to get it started .. it never takes less than 3 tries and sometimes well over 10 tries. The other thing is that sometimes when accelerating from a stop the...

Hi there, i have a ford explorer 1997 4x4 SOHC with 105,000 miles. recently had lots of work done, new tranny, shocks, tires, and more little stuff. Now my gas gauge is EXTREMELY INACCURATE. As i am driving it is constantly moving, overtime i brake it goes up, when i access it goes dow...

Help needed :) My 96' Explorer runs rough up to about 500rpm. Checked the car with my OBDii code reader, and got 3 codes: P0402 - EGR flow malfunction P1151 - O2 upstream sensor ind. lean P1152 - O2 upstream sensor ind rich Can the reason for my rough engine be caused by the Oxygen...

Hoping for a little clarification. I searched but wanted to be absolutely sure before I go buy parts and start ripping into the rig. I've got a '97 Mountaineer, 2WD, 5.0L V8. CEL came on yesterday. Went to Autozone to get the codes checked. Only code is P0133 - "bank 1 sensor 1 heated oxygen...

i bought my truckabout a year ago. recently i noticed a "patch" on my cat. im guessing that the insides are gone. my trucks semi loud. will that cause low mpg? also would a bad o2 cause 11 mpg? when my maf is connected i get black sooty smoke and the truck sounds like its under water, mpg goes...

does a bad o2 make that side run rich? been having bad mpg. and replaced almost everything.........what type of drivability problems would a bad o2 bring? im getting codes 998, 116, 159. :thumbdwn: any help would be greatly appreciated

Please Help! I have a 2002 Ford Explorer XLS with 90,000 miles. I have had three o2 sensors fail in the same location. Bank 1 Sensor 2. Does anyone have any ideas why it's only one location that's breaking? Any ideas? I take great care of my Ford. Thank's for your help! -Kyle

Hey guys I have a tricky one for you. I am pulling 2 DTC from my 2002 XLT 4.6 (P0042 & P7A00) using a Hypertech controller. P0042 - HO2S Heater Control Circuit (Bank 1 Sensor 3) I thought there were only 2 sensors per bank on these explorers. I havent had a chance to poke around yet but I...

Hi! I'm looking for 2 things. First, how do I get the codes for my 1995 Explorer (4.0L V6)? I've read "paper clip" but I'm not sure where to stick it *insert punchline here* and do I just count the Check Engine light flashes (I believe that's correct, but want to make sure!). Then, I...

Can you clean an o2 sensor? Got a code and I know it's in front of a blocked CAT so I'm wondering if I change the CAT do I need a new o2 sensor or can I clean it? If so how?

Have a 96 EB Explorer 5.0 Got a code for bank 1 o2 sensor but I'm not sure which is bank 1 and which is bank 2? I would assume that being in front of the grill and looking into the engine bay Bank 1 would be on the right and bank 2 on the left? Correct?

96 E.B. 5.0 140k miles. Check Engine Light just popped on Just got this truck from my brother. It was sitting in his driveway since May (needed a fuel pump) Had the pump and fuel filter changed. in the process of changing the plugs...