Anytime a DTC code call out a "circuit Malfunction" it means that something sooooo basic is wrong at the electrical circuit level that the PCM is unable to perform any useful diagnosis. Think:
Wiring: short, open, ground fault, stray voltage.
connector
sensor
PCM
If this were my car I would start with a through visual inspection of the car's wiring harness to the O2 sensors. My thought is the P11xx codes are "red herrings" and should be ignored. The DTC that should be addresses first are the "circuit malfunction" codes.
Do you have an ODB2 scanner that is capable of monitoring operational data? If so it would be handy to know what the O2 sensor voltage is doing over time. I suspect it's "flat line".
Here's some information on an affordable Windows based ODB2 scanner. This is a full function unit with two way communications and full graphing.
I recommend starting EVERY electrical trouble shooting session with a through review of the battery and charging system. It is very possible for a stall issue to be cause by something as simple as a bad battery or loose connection. Don't miss this chance for an easy win (or at least make your trouble shooting easier).
>>From Ford service manual. P0141 - HO2S Sensor Circuit Malfunction (HO2S-12)
See DTC P0135 P0161 - HO2S Sensor Circuit Malfunction (HO2S-22
See DTC P0135
P0135 - HO2S Sensor Circuit Malfunction (HO2S-11)
During testing the HO2S Heaters are checked for opens/shorts and excessive current draw. The test fails when current draw exceeds a calibrated limit and/or an open or short is detected.
Short to VPWR in harness or HO2S.
Water in harness connector.
Open VPWR circuit.
Open GND circuit.
Low battery voltage.
Corrosion or poor mating terminals and wiring
Damaged HO2S heater.
Damaged PCM.
P1151 - Lack of HO2S-21 Switch, Sensor Indicates Lean
See Possible Causes for DTC P1130 P1130 - Lack of HO2S-11 Switch, Fuel Trim at Limit
Anytime a DTC code call out a "circuit Malfunction" it means that something sooooo basic is wrong at the electrical circuit level that the PCM is unable to perform any useful diagnosis. Think:
Wiring: short, open, ground fault, stray voltage.
connector
sensor
PCM
If this were my car I would start with a through visual inspection of the car's wiring harness to the O2 sensors. My thought is the P11xx codes are "red herrings" and should be ignored. The DTC that should be addresses first are the "circuit malfunction" codes.
Do you have an ODB2 scanner that is capable of monitoring operational data? If so it would be handy to know what the O2 sensor voltage is doing over time. I suspect it's "flat line".
Here's some information on an affordable Windows based ODB2 scanner. This is a full function unit with two way communications and full graphing.
I recommend starting EVERY electrical trouble shooting session with a through review of the battery and charging system. It is very possible for a stall issue to be cause by something as simple as a bad battery or loose connection. Don't miss this chance for an easy win (or at least make your trouble shooting easier).
>>From Ford service manual. P0141 - HO2S Sensor Circuit Malfunction (HO2S-12)
See DTC P0135 P0161 - HO2S Sensor Circuit Malfunction (HO2S-22
See DTC P0135
P0135 - HO2S Sensor Circuit Malfunction (HO2S-11)
During testing the HO2S Heaters are checked for opens/shorts and excessive current draw. The test fails when current draw exceeds a calibrated limit and/or an open or short is detected.
Short to VPWR in harness or HO2S.
Water in harness connector.
Open VPWR circuit.
Open GND circuit.
Low battery voltage.
Corrosion or poor mating terminals and wiring
Damaged HO2S heater.
Damaged PCM.
P1151 - Lack of HO2S-21 Switch, Sensor Indicates Lean
See Possible Causes for DTC P1130 P1130 - Lack of HO2S-11 Switch, Fuel Trim at Limit
Sorry for the late reply but I'm running open headers and I assumed them didnt make that big of a deal seeing how old the car is but it could be causing this?
Sorry for the late reply but I'm running open headers and I assumed them didnt make that big of a deal seeing how old the car is but it could be causing this?
Where EXACTLY are the headers open in relation to the O2 sensors before or after?
If after the O2 sensor, it seems more likely that the problem is due to wiring damage caused by exhaust heat. Regardless, I would be concerned about the hot exhaust damaging the wiring Or the wiring harness touching the hot exhaust at any point.
Where EXACTLY are the headers open in relation to the O2 sensors before or after?
If after the O2 sensor, it seems more likely that the problem is due to wiring damage caused by exhaust heat. Regardless, I would be concerned about the hot exhaust damaging the wiring Or the wiring harness touching the hot exhaust at any point.