P0151 2002 FORD F150 - O2 Sensor Circuit Low Voltage Bank 2 Sensor 1
P0151 2002 FORD F150 Possible Causes
- Faulty Front Heated Oxygen Sensor Bank 2
- Front Heated Oxygen Sensor Bank 2 harness is open or shorted
- Front Heated Oxygen Sensor Bank 2 circuit poor electrical connection
- Inappropriate fuel pressure
- Faulty fuel injectors
- Intake air leaks may be faulty
- Exhaust gas leaks
First diagnose P0151 2002 FORD F150 code
Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
P0151 2002 FORD F150 Tech NotesReplacing the Front Heated Oxygen Sensor Bank 2 usually takes care of the problem.
The HO2S sensor is monitored for a negative voltage known as characteristic shift downward (CSD). If the sensor is thought to be switching from 0 volts to -1 volts during testing, the PCM will use this input and remain in fuel control.
Cost of diagnosing the P0151 2002 FORD F150 code
Labor: 1.0The cost of diagnosing the P0151 2002 FORD F150 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
When is the P0151 2002 FORD F150 code detected?The voltage signal from the sensor is lower than the specified time.
P0151 2002 FORD F150 Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- High Fuel Consumption
- Excessive smoke from Exhaust
P0151 2002 Ford F150 DescriptionThe front heated oxygen sensor (or O2 sensor 1) is placed into the exhaust manifold. It detects the amount of oxygen in the exhaust gas compared to the outside air. The heated oxygen sensor 1 has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. The heated oxygen sensor 1 signal is sent to the Engine Control Module (ECM). The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical change from 1V to 0V.
P0151 2002 FORD F150 More InformationNeed more information on how to fix the P0151 2002 FORD F150 code?
Get Access to Factory Service Manuals
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