AutoCodes – Ford – P0155 2000 Ford F150

P0155 2000 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 2000 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 6,118

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0155 2000 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 2000 Ford F150 - O2 Heater Circuit Bank 2 Sensor 1 - AutoCodes.com — P0155 2000 Ford F150 Code - O2 Heater Circuit Bank 2 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P0155 2000 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 2000 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.

What does this mean?

Code Tech Notes

During testing the HO2S Heaters are checked for opens/shorts and excessive current draw. The test fails when current draw exceeds a calibrated limit and/or an open or short is detected.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0155 2000 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 2000 Ford F150 Code

1. What does the OBDII code P0155 for a 2000 Ford F150 indicate?

The code P0155 refers to an issue with the O2 heater circuit in Bank 2 Sensor 1 of the vehicle's oxygen sensor.

2. What are the common symptoms of OBDII code P0155 in a 2000 Ford F150?

Common symptoms of code P0155 may include poor fuel economy, rough idling, engine misfires, and an illuminated Check Engine Light.

3. What are the possible causes of OBDII code P0155 in a 2000 Ford F150?

Potential causes of code P0155 include a faulty oxygen sensor, damaged wiring or connectors, a blown fuse, or a malfunctioning engine control module (ECM).

4. How can I diagnose the O2 heater circuit issue for Bank 2 Sensor 1 in my 2000 Ford F150?

You can diagnose the O2 heater circuit issue by checking the wiring and connectors for damage, testing the oxygen sensor's resistance, and inspecting the fuse related to the sensor.

5. How can I repair OBDII code P0155 in my 2000 Ford F150?

To repair code P0155, you may need to replace the Bank 2 Sensor 1 oxygen sensor, repair or replace damaged wiring or connectors, and ensure the fuse related to the sensor is in working condition.

6. Can I drive my 2000 Ford F150 with OBDII code P0155?

It is generally not recommended to drive with code P0155 present, as it can lead to decreased fuel efficiency and potential engine performance issues. It is best to address the problem promptly.

7. Is it possible to reset the Check Engine Light after repairing OBDII code P0155 in a 2000 Ford F150?

Yes, once the issue causing code P0155 has been repaired, you can reset the Check Engine Light using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes.

8. How much does it typically cost to repair OBDII code P0155 in a 2000 Ford F150?

The cost of repairing code P0155 can vary depending on the exact cause of the issue and whether you choose to do the repairs yourself or take your vehicle to a professional mechanic. Costs may range from $100 to $300 or more.

9. Can a DIY enthusiast fix OBDII code P0155 in a 2000 Ford F150?

Yes, a DIY enthusiast with automotive repair knowledge and the necessary tools can often fix code P0155 by following repair guides, replacing parts, and conducting diagnostic tests.

10. How often does OBDII code P0155 occur in a 2000 Ford F150?

Code P0155 can occur sporadically or more frequently, depending on the underlying cause and the vehicle's overall condition. Regular maintenance and prompt repairs can help prevent the recurrence of this code.