O2 sensor

2001 ford Escape oxygen sensor location in vehicle

It was tested by auto zone and checker auto parts. Did not write down which one needed to be replaced, replaced wrong one. Trying to figure out where both are located in the vehicle so I know where the other one is.

Received code 1130 from mechanic. Came up catalytic exhaust performing below threshold. Saying bank 2 sensor bad. Where is this and does this mean a catalytic converter is bad or just the sensor?

I have a trouble code P0136 on my daughters 2003 Ford Escape 3.0L. O'Reilly's said "Downstream Heated Oxygen Sensor HO2S 12 Circuit Malfunction Bank 1. Where is Bank 1, by firewall or radiator? Also want to check wire from HO2S to PCM connector to make sure it is OK. Which pin on PCM is it and what is color code of wire? Could you give me the Pinout chart for this model? That would be most helpful. Thanks

New used car, check engine light comes on, after purchase. Take back to dealer, they say it is oxygen sensor light. After a day at shop, sensor replaced, two days later, check engine light comes on again. Take back to dealer, they say there are four oxygen sensors, and after putting vehicle on machine, light goes out, but they say they have to order another sensor? Asked what is the oxygen sensor, and should I have concern about traveling. They advise it has to do with the emissions?

Car is only two weeks new for me?

Have the DPFE sensor replaced most of the time this will correct the issues and save you money.

Would needing to replace the senors cause the car to idle rough when the engine is cold I have replaced the plugs wires and fuel filter asready the codes left are for 2 of the oxygen sensors

This is my sisters car and it was running really rough, I took a look at the codes and it came up with cylinder 6 misfire and all 4 oxygen sensor codes. I replaced all of the spark plugs and a few of the coils with known good coils scavenged out another escape, and replaced intake manifold gasket. The misfife code was gone, still runs rough, and still have o2 sensor codes at this point (obviously haha.) I then replaced all o2 sensors (sister said those codes have been on for a few years), with roughly 150k on the car and they've never been touched it seemed like the next logical step. I cleared the codes and started the car, it ran good for a minute and the codes came back now runs rough again. The fuse is good and the harness is intact. Also replaced a vaccum hose that was collapsed. But I am stumped now. Any ideas on what pins to test on the harness from the ecu to the sensors? I dont want my pops to take this project from me to bring to a "real" (expensive) mechanic.

I found the vaccum leak and fixed, the rough idle is gone but I still am having the issue of all 4 oxygen sensor codes coming up with all new sensors. I was wondering if you knew which pins to test from the computer harness to the sensor plugs. Trying to decide whether its a computer problem, converter problem, or a wiring problem.

I have a 2005 ford escape 2.3 4cyl. I have a code 2195 I replaced the oxygen sensor before the converter erased the code, but it came back. Car runs good but occ. Will idle rough. D.M.