1999 3.0 flex fuel 02 sensor need help
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From: San Diego, California
1999 3.0 flex fuel 02 sensor need help
Hey if anyone could please help answer this question it would be greatly appreciated. I live in California and have a 1999 3.0 flex fuel ranger throwing at p0513 "02 Sensor Circuit Slow Response (Bank 2 Sensor 1)". Ive been searching and can't find a map of the exhaust showing which 02 sensor this is. Please let me know if you can direct me on which one i need to replace. Car runs fine but i have smog coming up in 2 months and need this fixed asap
Welcome to the forum
On Ford's, Bank 1 of a V6(3.0l) is the passenger side, Bank 2 is the Drivers side
For O2 sensors
Sensor "1's" are closest to the engine, there are 2 of these on a V6 engine
Sensor "2's" are after the Cat converters, there is usually just 1 of these but can be 2 on Factory dual exhaust setups
So Bank 2 Sensor 1 would be the O2 sensor on drivers side exhaust in the engine bay, but you may have to access it from under the vehicle or through the wheel well
O2 sensors are the ONLY sensors that wear out, 100k miles or 12 years which ever comes first, after that they are costing you $$$ in lower MPG
O2s use a Chemical reaction to detect Oxygen in the exhaust and they slowly run out of that chemical, as they do they report FALSE LEAN, so computer runs the engine richer than needed and that costs you MONEY in wasted fuel, also shortens the life of Cat Converters, as they need to run a little hotter because of the Richer mix
1999 Ranger is 23 years old so should be just getting its 3rd SET of O2s, regardless of miles
So you should plan on swapping out all 3, if they haven't been changed
They pay for themselves in fuel savings over the next 100k miles or 12 years
On Ford's, Bank 1 of a V6(3.0l) is the passenger side, Bank 2 is the Drivers side
For O2 sensors
Sensor "1's" are closest to the engine, there are 2 of these on a V6 engine
Sensor "2's" are after the Cat converters, there is usually just 1 of these but can be 2 on Factory dual exhaust setups
So Bank 2 Sensor 1 would be the O2 sensor on drivers side exhaust in the engine bay, but you may have to access it from under the vehicle or through the wheel well
O2 sensors are the ONLY sensors that wear out, 100k miles or 12 years which ever comes first, after that they are costing you $$$ in lower MPG
O2s use a Chemical reaction to detect Oxygen in the exhaust and they slowly run out of that chemical, as they do they report FALSE LEAN, so computer runs the engine richer than needed and that costs you MONEY in wasted fuel, also shortens the life of Cat Converters, as they need to run a little hotter because of the Richer mix
1999 Ranger is 23 years old so should be just getting its 3rd SET of O2s, regardless of miles
So you should plan on swapping out all 3, if they haven't been changed
They pay for themselves in fuel savings over the next 100k miles or 12 years
Last edited by RonD; Apr 23, 2022 at 10:37 AM.
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