'07 Ford Escape, 3.0L Eng, 118k miles

07 Ford Escape.

P0053 HO2S B1 S1 Heater Resistance

P0059 HO2S B2 S1 Heater Resistance

P0193 Fuel Rail Pressure A Circuit High Input

P1000 OBDII System Checks Incomplete

Backstory. Had this last week for a customer. I haven't pulled data but if I recall the FF Data had been erased as they'd seen a O2 Sensor Code so they replaced the O2 sensor on the Engine.

I drove, ran rough especially given the cold weather.

Found a intake boot before throttle body disconnected due to not being mounted properly. Installed, started, ran good.

Drove it, added gas, left it running while doing that. Used the ATS E-Scan Elite, Mapped the fuel cell blocks before and after to confirm the fix

I had cleared codes, I don't think the codes were the same from what I recall but there was some oxygen sensor code or maybe codes. This afternoon I get a call from the customer saying we need you to come back and look at this at the car lot because the check engine light came back on. I drove it for more than a half an hour that day no they weren't concerned about the monitors being completed so we rolled with it that day.

I can find some of the data, have some of before & after as well of fuel trim cell blocking I'll upload as well.

I'm trying to figure out if the Fuel Rail Pressure code is a primary or secondary code to the Heater Resistance Circuit HO2S codes for bank 1&2 sensor 1 on both?

Any and all help is appreciated.

I haven't purchased service information on this job because when I got it cleared up last week it I stopped short of doing that.

Now I am holding off on getting the service information as want to see if it's a new code or part of previous deal. Some of that data is on E-Scan tablet so have to check it.

Correct me if I'm incorrect but with both banks having resistance issues this would point to a issue that both of then share .

Not having a wiring diagram makes me wonder I'll use Google for a min.

I'm thinking closer to possibly both of the sensors being affected by the same supply?

Found wiring diagrams. Will handle this over the weekend I'm thinking

I'd start with resistance measurements across the heater elements and compare to specs. If they turn out to be in range next step check wiring from sensor to pcm. You also can read the resistance at the pcm connector and compare to the unplugged sensor's reading

I wouldn't try to connect the dots between these codes right away. These jokers may have installed Wish splice-in O2's and, big surprise, the PCM isn't happy with them.

Before clearing codes, check your OEM scan data for the heater current PIDs. Usually in the O2 Sensor data list. They're called HO2S11(mA), HO2S12(mA), on and on. They're not a live reading, but they do show the results of the O2 Sensor Heater monitor.

P0193 is unlikely to be related to the O2's, IMO. Sensors are a very common failure. You can usually catch it by watching the FRP signal voltage while gently tapping on the sensor itself, or wiggling the connector. Glitches to 5.0V are a failure. Check the connector for pin fits and corrosion before replacing the sensor.

Tyler wrote:

I wouldn't try to connect the dots between these codes right away. These jokers may have installed Wish splice-in O2's and, big surprise, the PCM isn't happy with them.

Before clearing codes, check your OEM scan data for the heater current PIDs. Usually in the O2 Sensor data list. They're called HO2S11(mA), HO2S12(mA), on and on. They're not a live reading, but they do show the results of the O2 Sensor Heater monitor.

P0193 is unlikely to be related to the O2's, IMO. Sensors are a very common failure. You can usually catch it by watching the FRP signal voltage while gently tapping on the sensor itself, or wiggling the connector. Glitches to 5.0V are a failure. Check the connector for pin fits and corrosion before replacing the sensor.

Saw the video Danner did a few yrs ago on the tapping on the FRP/FPR sensor whichever of the two Lol...