AutoCodes – Ford – P1150 1999 Ford F150

P1150 1999 Ford F150 Code - Lack of Upstream Heated Oxygen Sensor Switch Adaptive Fuel Limit Bank 2

Quick Answer

The Heated Oxygen Sensor (HO2S) Monitor is an on-board strategy designed to monitor the HO2S sensors for a malfunction or deterioration that can affect emissions. Common causes include Oil overfill, Faulty Oxygen Sensor, Fuel pressure high or low. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1150 1999 Ford F150 indicates Lack of Upstream Heated Oxygen Sensor Switch Adaptive Fuel Limit Bank 2.
Common causes: Common causes include Oil overfill, Faulty Oxygen Sensor, Fuel pressure high or low.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 2,460

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 02, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P1150 1999 Ford F150 Description

The Heated Oxygen Sensor (HO2S) Monitor is an on-board strategy designed to monitor the HO2S sensors for a malfunction or deterioration that can affect emissions. Under specific conditions, the fuel control or upstream HO2S sensors are checked for proper output voltage and response rate (the time it takes to switch from lean to rich or rich to lean). Downstream HO2S sensors used for Catalyst Monitor are also monitored for proper output voltage. Input is required from the Engine Coolant Temperature (ECT) or Cylinder Head Temperature (CHT), Inlet Air Temperature (IAT), Mass Air Flow (MAF), Throttle Position (TP) and Crankshaft Position (CKP) sensors to activate the HO2S Monitor. The Fuel System Monitor and Misfire Detection Monitor must also have completed successfully before the HO2S Monitor is enabled.
• The HO2S sensor senses the oxygen content in the exhaust flow and outputs a voltage between zero and 1.0 volt. Lean of stoichiometric (air/fuel ratio of approximately 14.7:1 for gasoline engines), the HO2S will generate a voltage between zero and 0.45 volt. Rich of stoichiometric, the HO2S will generate a voltage between 0.45 and 1.0 volt.
• The HO2S Monitor evaluates both the upstream (Fuel Control) and downstream (Catalyst Monitor) HO2S for proper function.
• Once the HO2S Monitor is enabled, the upstream HO2S signal voltage amplitude and response frequency are checked. Excessive voltage is determined by comparing the HO2S signal voltage to a maximum calibratable threshold voltage.
• A fixed frequency closed loop fuel control routine is executed and the upstream HO2S voltage amplitude and output response frequency are observed. A sample of the upstream HO2S signal is evaluated to determine if the sensor is capable of switching or has a slow response rate.
• An HO2S heater circuit fault is determined by turning the heater on and off and looking for a corresponding change in the OSM and by
measuring the current going through the heater circuit.
• The MIL is activated after a fault is detected on two consecutive OBD II drive cycles.

OBDII Code P1150 1999 Ford F150 - Lack of Upstream Heated Oxygen Sensor Switch Adaptive Fuel Limit Bank 2 - AutoCodes.com — P1150 1999 Ford F150 Code - Lack of Upstream Heated Oxygen Sensor Switch Adaptive Fuel Limit Bank 2

What does this mean?

What are the Possible Causes of the DTC P1150 1999 Ford F150?

Oil overfill
Faulty Oxygen Sensor
Fuel pressure high or low
MAF sensor dirty/defective
Vacuum leak on engine
Leaking fuel injector or fuel pressure regulator
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P1150 1999 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

The HEGO Sensor is monitored for switching. The test fails when the HO2S fails to switch due to circuit or fuel at or exceeding a calibrated limit.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1150 1999 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 P1150 1999 Ford F150 code?

Need more information on how to fix the P1150 1999 Ford F150 code? Get Access to Factory Service Manuals

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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 P1150 1999 Ford F150 Code

1. What are the common symptoms of OBDII code P1150 on a 1999 Ford F150?

- Common symptoms include poor fuel economy, rough idle, engine misfires, and a decrease in overall performance.

2. What does the OBDII code P1150 on a 1999 Ford F150 mean?

- The code indicates a lack of switch response from the upstream heated oxygen sensor in Bank 2, leading to adaptive fuel limits being affected.

3. What are the possible causes of OBDII code P1150 on a 1999 Ford F150?

- Possible causes include a faulty upstream heated oxygen sensor, wiring issues, exhaust leaks, vacuum leaks, or a problem with the engine's air-fuel mixture.

4. How can I diagnose the source of OBDII code P1150 on a 1999 Ford F150?

- Start by inspecting the upstream heated oxygen sensor and its wiring for any damage or corrosion. Check for exhaust or vacuum leaks and ensure the air-fuel mixture is within specifications.

5. Can I continue driving my 1999 Ford F150 with OBDII code P1150?

- It is not recommended to drive the vehicle with this code present, as it can lead to poor engine performance and potential damage over time.

6. How can I repair OBDII code P1150 on a 1999 Ford F150?

- Repair options may include replacing the upstream heated oxygen sensor, repairing any wiring issues, fixing exhaust or vacuum leaks, and resetting the engine's adaptive fuel limits.

7. Will resetting the OBDII code P1150 on a 1999 Ford F150 make it go away permanently?

- Simply resetting the code may temporarily clear it, but if the underlying issue is not addressed, the code is likely to return.

8. How much does it typically cost to repair OBDII code P1150 on a 1999 Ford F150?

- The cost can vary depending on the specific issue causing the code, but it may range from $100 to $300 for parts and labor.

9. Can a DIY enthusiast fix OBDII code P1150 on a 1999 Ford F150?

- Depending on the skill level and tools available, some DIY enthusiasts may be able to address this code by replacing the upstream heated oxygen sensor or fixing wiring issues.

10. Is it necessary to have OBDII code P1150 on a 1999 Ford F150 repaired immediately?

- While the vehicle may still be operable with this code present, it is recommended to address the issue promptly to prevent further damage and ensure optimal engine performance.