AutoCodes – Ford – P1150 Ford

P1150 Ford 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 Faulty Upstream Oxygen Sensor Bank 2, Fuel pressure high or low, MAF sensor dirty/defective. 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 Ford indicates Lack of Upstream Heated Oxygen Sensor Switch Adaptive Fuel Limit Bank 2.
Common causes: Common causes include Faulty Upstream Oxygen Sensor Bank 2, Fuel pressure high or low, MAF sensor dirty/defective.
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 37,305

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
Cost to Diagnose
FAQs
Comments
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Code P1150 Ford 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 Ford - Lack of Upstream Heated Oxygen Sensor Switch Adaptive Fuel Limit Bank 2 - AutoCodes.com — P1150 Ford 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 Ford?

Faulty Upstream Oxygen Sensor Bank 2
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 Ford?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1150 Ford 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 Ford code?

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Need Help with the Code?

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Information for Specific Ford Models

P1150 1997 Ford F150 — Lack of Upstream Heated Oxygen Sensor Switch Adaptive Fuel Limit Bank 2
P1150 1998 Ford F150 — Lack of Upstream Heated Oxygen Sensor Switch Adaptive Fuel Limit Bank 2
P1150 1999 Ford F150 — Lack of Upstream Heated Oxygen Sensor Switch Adaptive Fuel Limit Bank 2
P1150 2000 Ford F150 — Lack of Upstream Heated Oxygen Sensor Switch Adaptive Fuel Limit Bank 2
P1150 2001 Ford F150 — Lack of Upstream Heated Oxygen Sensor Switch Adaptive Fuel Limit Bank 2
P1150 2002 Ford F150 — Lack of Upstream Heated Oxygen Sensor Switch Adaptive Fuel Limit Bank 2
P1150 2003 Ford F150 — Lack of Upstream Heated Oxygen Sensor Switch Adaptive Fuel Limit Bank 2

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 Ford Code

1. What are the common symptoms of an OBDII code P1150 in a Ford vehicle?

- Common symptoms include decreased fuel efficiency, engine hesitation, rough idling, and an illuminated check engine light.

2. What causes an OBDII code P1150 in a Ford vehicle?

- The code P1150 is typically triggered by a faulty upstream heated oxygen sensor (HO2S) in Bank 2, which leads to the engine running too rich or too lean.

3. How does a lack of upstream heated oxygen sensor switch adaptive fuel limit affect the vehicle's performance?

- The lack of adaptive fuel limit adjustment can result in poor engine performance, increased emissions, and potential damage to the catalytic converter.

4. Can I continue driving my Ford vehicle with an OBDII code P1150?

- It is not recommended to drive the vehicle with an unresolved P1150 code, as it can lead to further engine damage and decreased fuel efficiency.

5. How can I diagnose and repair an OBDII code P1150 in my Ford vehicle?

- The first step is to inspect the Bank 2 upstream heated oxygen sensor for any signs of damage or wear. If necessary, replace the sensor to resolve the issue.

6. Are there any DIY tips for troubleshooting an OBDII code P1150 in a Ford?

- While it's possible to replace the upstream heated oxygen sensor yourself, it's recommended to have a professional diagnose and repair the issue to avoid any potential mistakes.

7. How much does it typically cost to repair an OBDII code P1150 in a Ford vehicle?

- The cost of repairing a P1150 code can vary depending on the labor rates and the price of the replacement sensor. On average, expect to pay a few hundred dollars for parts and labor.

8. Will resetting the check engine light resolve an OBDII code P1150 in a Ford?

- Resetting the check engine light may temporarily turn it off, but the underlying issue causing the P1150 code will need to be addressed to prevent further problems.

9. Can a dirty or clogged air filter cause an OBDII code P1150 in a Ford vehicle?

- While a dirty air filter can affect engine performance, it is unlikely to directly cause an OBDII code P1150 related to the upstream heated oxygen sensor in Bank 2.

10. Is it safe to drive my Ford vehicle to a repair shop with an illuminated check engine light due to an OBDII code P1150?

- It is generally safe to drive the vehicle to a repair shop for diagnosis and repair of the P1150 code, but avoid any aggressive driving to prevent further damage to the engine.