P1152 2001 Ford F150 Code - Lack of Upstream Heated Oxygen Sensor Switch Sensor Indicates Rich 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
- P1152 2001 Ford F150 indicates Lack of Upstream Heated Oxygen Sensor Switch Sensor Indicates Rich 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.
Code P1152 2001 Ford F150 Description
• 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.
What are the Possible Causes of the DTC P1152 2001 Ford F150?
- 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 P1152 2001 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 is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1152 2001 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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Frequently Asked Questions about P1152 2001 Ford F150 Code
1. What does the OBDII code P1152 mean on a 2001 Ford F150?
Code P1152 indicates that the upstream heated oxygen sensor (HO2S) on Bank 2 is detecting a consistently rich air-fuel mixture and isn’t switching as expected.
2. What are the symptoms of code P1152 on a 2001 Ford F150?
Symptoms may include poor fuel economy, rough idling, black smoke from the exhaust, hesitation during acceleration, and the check engine light being illuminated.
3. What causes code P1152 on a 2001 Ford F150?
Common causes include a faulty upstream oxygen sensor (Bank 2), a vacuum leak, a malfunctioning fuel injector, excessive fuel pressure, or issues with the powertrain control module (PCM).
4. How do I fix the P1152 code on my 2001 Ford F150?
Repairs may involve replacing the upstream oxygen sensor on Bank 2, checking for vacuum leaks, inspecting fuel injectors, or addressing fuel system issues like high fuel pressure.
5. Can a dirty or damaged mass airflow (MAF) sensor cause code P1152?
Yes, a faulty MAF sensor can send incorrect air-flow readings to the PCM, causing a rich condition and triggering the P1152 code.
6. Is it safe to drive with the P1152 code on a 2001 Ford F150?
While it may be safe to drive short distances, prolonged driving with this code can lead to engine damage, poor fuel efficiency, and excessive emissions. Prompt diagnosis and repair are recommended.
7. How can I diagnose a P1152 code on my 2001 Ford F150?
Start by scanning the code, inspecting the upstream oxygen sensor (Bank 2), checking for vacuum leaks, testing the fuel injectors, and verifying the fuel pressure.
8. Does the P1152 code always mean the oxygen sensor is faulty?
No, while a faulty oxygen sensor is a common cause, issues like fuel delivery problems, vacuum leaks, or PCM errors can also trigger the code.
9. How much does it cost to repair a P1152 code on a 2001 Ford F150?
Repair costs vary, but replacing an oxygen sensor typically costs $150-$300, while addressing other issues like vacuum leaks or fuel system problems may increase costs.
10. Which side of the engine is Bank 2 on a 2001 Ford F150?
On a 2001 Ford F150, Bank 2 is located on the passenger side of the engine.
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