AutoCodes – Ford – P0155 2002 Ford F150

P0155 2002 Ford F150 Code - O2 Heater Circuit Bank 2 Sensor 1

Quick Answer

Oxygen Sensors (O2S) or Heated Oxygen Sensors (HO2S) need to reach a minimum operating temperature of 750 degrees F to produce an accurate voltage signal. Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1, Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 circuit fuse, Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 harness is open shorted to ground. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means
P0155 2002 Ford F150 indicates O2 Heater Circuit Bank 2 Sensor 1.
Common causes
Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1, Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 circuit fuse, Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 harness is open shorted to ground.
Severity
Moderate - service should be scheduled soon.
Can I drive?
The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
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Code Popularity 5,426
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 14, 2020
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Code P0155 2002 Ford F150 Description

Oxygen Sensors (O2S) or Heated Oxygen Sensors (HO2S) need to reach a minimum operating temperature of 750 degrees F to produce an accurate voltage signal. The faster the heated oxygen sensor reaches that temperature the faster the sensor will start sending an accurate signal to the Engine Control Module (ECM). In order to achieve the require temperature, a heater element is included inside the heated oxygen sensor. The ECM controls the heated oxygen sensor heater element based on signals from the engine coolant temperature and engine load. The ECM controls the heater element circuit by allowing current flow to ground. The ECM monitors the voltage signal received through the heater element circuit and determines the state of the circuit by comparing the voltage detected with the factory specifications.
OBDII Code P0155 2002 Ford F150 - O2 Heater Circuit Bank 2 Sensor 1 - AutoCodes.com
P0155 2002 Ford F150 Code - O2 Heater Circuit Bank 2 Sensor 1

What are the Possible Causes of the DTC P0155 2002 Ford F150?

  • Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1
  • Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 circuit fuse
  • Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 harness is open shorted to ground
  • Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 circuit poor electrical connection
  • Faulty Engine Control Module (ECM)

How to Fix the DTC P0155 2002 Ford F150?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0155 2002 Ford F150 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0155 2002 Ford F150 Code

1. What does the OBDII code P0155 for a 2002 Ford F150 mean?

The code P0155 indicates an issue with the O2 sensor heater circuit in Bank 2 Sensor 1 of the vehicle.

2. What are the common symptoms of OBDII code P0155 in a 2002 Ford F150?

Common symptoms of code P0155 may include poor fuel economy, rough idling, engine misfires, and the illumination of the check engine light.

3. What are the possible causes of O2 Heater Circuit Bank 2 Sensor 1 code P0155 in a 2002 Ford F150?

Possible causes of code P0155 include a faulty O2 sensor, damaged wiring or connectors, a blown fuse, or a problem with the PCM (powertrain control module).

4. How can I diagnose the O2 Heater Circuit Bank 2 Sensor 1 code P0155 in my 2002 Ford F150?

To diagnose code P0155, you can use a multimeter to test the O2 sensor heater circuit resistance, check for continuity in the wiring, inspect the connectors for damage, and ensure the fuse related to the O2 sensor is intact.

5. What is the recommended repair for OBDII code P0155 in a 2002 Ford F150?

The recommended repair for code P0155 is often to replace the Bank 2 Sensor 1 O2 sensor, repair any damaged wiring or connectors, and ensure the fuse is in working condition.

6. Can I continue to drive my 2002 Ford F150 with O2 Heater Circuit Bank 2 Sensor 1 code P0155?

It is generally not recommended to drive with a persistent O2 sensor issue as it can lead to decreased fuel efficiency and potential damage to other components. It is best to address the problem promptly.

7. How much does it typically cost to repair O2 Heater Circuit Bank 2 Sensor 1 code P0155 in a 2002 Ford F150?

The cost of repairing code P0155 can vary depending on the specific issue, but it may range from $150 to $300 for parts and labor.

8. Will resetting the check engine light resolve OBDII code P0155 in a 2002 Ford F150?

Resetting the check engine light may temporarily turn off the warning indicator, but it will not fix the underlying issue causing code P0155. It is important to diagnose and repair the problem to prevent further issues.

9. How long does it take to repair O2 Heater Circuit Bank 2 Sensor 1 code P0155 in a 2002 Ford F150?

The repair time for code P0155 can vary depending on the extent of the issue and the availability of parts, but it typically takes 1-2 hours for a professional technician to complete the repair.

10. Are there any preventative measures I can take to avoid O2 Heater Circuit Bank 2 Sensor 1 code P0155 in my 2002 Ford F150?

Regular maintenance, such as checking and replacing O2 sensors at recommended intervals, inspecting wiring for damage, and ensuring proper fuse function, can help prevent code P0155 from occurring.

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