Heated Oxygen Sensor Heater Control Circuit High Bank 2 Sensor 2 (Ford)
What does P1144 mean?
The P1144 code means the vehicle's onboard diagnostic system has detected: Heated Oxygen Sensor Heater Control Circuit High Bank 2 Sensor 2 (Ford). This is a low severity code.
Common Symptoms
- Check Engine Light on
- Failed emissions test
- Slow O2 sensor warm-up on Bank 2
- No noticeable drivability problems
- Slightly higher cold-start emissions
Probable Causes (Ranked by Likelihood)
- Burned out heater element in Bank 2 Sensor 2 Very High
- Open circuit in heater wiring High
- Disconnected or corroded sensor connector Moderate
- Failed heater relay Moderate
- PCM heater driver open circuit Low
Step-by-Step Diagnostic Procedure
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Measure heater resistance at the sensor (infinite reading confirms open element)
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Check for power at the heater circuit with key on engine off
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Inspect the sensor connector for secure fit and clean terminals
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Test wiring continuity from PCM to sensor
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Replace the O2 sensor if heater element is open
Frequently Asked Questions
How do I know which O2 sensor is Bank 2 Sensor 2?
Bank 2 Sensor 2 is the downstream sensor (after the catalytic converter) on the Bank 2 side. On Ford V8 trucks, Bank 2 is typically the driver side. Sensor 2 is always the post-cat sensor.
Can I replace the O2 sensor myself?
Yes. Downstream O2 sensors are accessible from under the vehicle. Use a specialized O2 sensor socket, apply penetrating oil to the threads, and allow it to soak before removal. Torque the new sensor to specification.
Will anti-seize help with O2 sensor installation?
Some O2 sensors come with anti-seize already applied to the threads. If yours does not, use only a small amount of anti-seize rated for high temperatures. Do not get anti-seize on the sensor tip or inside the sensor.