Ford PO141 Code – O2 Sensor Heater Circuit Malfunction. How to Fix This?

[Nicko]

The P0141 code indicates a malfunction in the O2 sensor heater circuit, which can lead to incorrect readings from the sensor. This typically happens when the heater element in the oxygen sensor fails, which means the sensor can’t warm up to the correct temperature to take accurate readings. If you’ve got this code on your Ford, here’s how you can troubleshoot and fix it:

1. Check the O2 sensor wiring: Look for damaged, frayed, or corroded wires leading to the sensor. A bad connection could be the cause.
   
2. Test the O2 sensor heater circuit: You’ll need a multimeter to check the resistance across the heater element terminals. If the resistance is too high or low, it means the heater has failed.
   
3. Replace the O2 sensor: If the heater circuit is faulty, you’ll need to replace the entire oxygen sensor. Make sure to get the correct sensor for your engine type.
   

This fix shouldn’t take long, and you’ll be back on the road with the check engine light off in no time.