P1127 1997 FORD F150 Possible Causes
What Does This Mean?
- Faulty O2 sensor heaters
- O2 sensor heater element circuit open or shorted
- Poor electrical connection in O2 sensor heater circuit
How to Fix Code P1127 1997 FORD F150?
Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
- Check Engine Light on (or service engine soon warning light)
P1127 1997 FORD F150 Meaning
The Heated Oxygen Sensor (HO2S) monitor uses an exhaust temperature model to determine when the HO2S heaters are activated. The test fails when the inferred exhaust temperature is below a minimum calibrated value.