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AutoCodes – Ford – P0155 1997 Ford F150

P0155 1997 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 1997 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 6,980
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Table of contents Created and updated by William Orellana on Jun 14, 2020
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Code P0155 1997 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 1997 Ford F150 - O2 Heater Circuit Bank 2 Sensor 1 - AutoCodes.com
P0155 1997 Ford F150 Code - O2 Heater Circuit Bank 2 Sensor 1
What does this mean?

What are the Possible Causes of the DTC P0155 1997 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 1997 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 1997 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.

Need more information about the P0155 1997 Ford F150 code?

Need more information on how to fix the P0155 1997 Ford F150 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0155 1997 Ford F150 code diagnosed by a professional: Find a repair shop in your area

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 1997 Ford F150 Code

1. What does OBDII code P0155 mean for a 1997 Ford F150?

The OBDII code P0155 on a 1997 Ford F150 indicates an issue with the O2 sensor heater circuit for Bank 2 Sensor 1.

2. What are the common symptoms of OBDII code P0155 on a 1997 Ford F150?

Common symptoms of P0155 may include poor fuel economy, rough idle, engine hesitation, and an illuminated check engine light.

3. What are the possible causes of OBDII code P0155 on a 1997 Ford F150?

Potential causes of P0155 include a faulty O2 sensor, damaged wiring or connectors, a blown fuse, or a problem with the vehicle's PCM.

4. How can I diagnose the O2 heater circuit Bank 2 Sensor 1 issue on my 1997 Ford F150?

To diagnose P0155, you can use a multimeter to test the O2 sensor heater circuit resistance, check the wiring for damage, and inspect the fuse related to the O2 sensor heater.

5. How can I repair OBDII code P0155 on my 1997 Ford F150?

Repair options for P0155 include replacing the Bank 2 Sensor 1 O2 sensor, repairing damaged wiring or connectors, and ensuring the fuse for the O2 sensor heater is in working condition.

6. Can driving with OBDII code P0155 on a 1997 Ford F150 cause further damage?

Continued driving with P0155 may lead to decreased fuel efficiency, potential damage to the catalytic converter, and poor engine performance over time.

7. How much does it typically cost to repair O2 Heater Circuit Bank 2 Sensor 1 on a 1997 Ford F150?

The cost to repair P0155 can vary depending on the specific issue, but replacing the O2 sensor or repairing wiring may cost anywhere from $100 to $300 or more.

8. Will resetting the check engine light resolve OBDII code P0155 on a 1997 Ford F150?

Resetting the check engine light may temporarily clear the code, but if the underlying issue causing P0155 is not addressed, the code is likely to return.

9. Can I drive my 1997 Ford F150 with OBDII code P0155?

While it is possible to drive with P0155, it is not recommended as it can lead to poor engine performance and potential long-term damage if left unresolved.

10. Is it necessary to use a professional mechanic to repair O2 Heater Circuit Bank 2 Sensor 1 on a 1997 Ford F150?

While it is possible to DIY the repair for P0155, seeking help from a professional mechanic is recommended for accurate diagnosis and proper repair to ensure the issue is resolved correctly.

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