P1138 2002 Ford F150 Code - Lack Of Heated Oxygen Sensor Switches Bank 1 Sensor 2 Switch Indicates Rich
Quick Answer
The diagnostic trouble code P1138 for a 2002 Ford F150 indicates a lack of heated oxygen sensor switches for Bank 1 Sensor 2, which in turn indicates a rich air-fuel mixture in the exhaust system. Common causes include Faulty heated oxygen sensor (Bank 1 Sensor 2), Wiring or connector issues in the HO2S circuit, Exhaust system leaks. 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
- P1138 2002 Ford F150 indicates Lack Of Heated Oxygen Sensor Switches Bank 1 Sensor 2 Switch Indicates Rich.
- Common causes
- Common causes include Faulty heated oxygen sensor (Bank 1 Sensor 2), Wiring or connector issues in the HO2S circuit, Exhaust system leaks.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P1138 2002 Ford F150 Description
The diagnostic trouble code P1138 for a 2002 Ford F150 indicates a lack of heated oxygen sensor switches for Bank 1 Sensor 2, which in turn indicates a rich air-fuel mixture in the exhaust system. The heated oxygen sensor (HO2S) is responsible for monitoring the oxygen levels in the exhaust gases and sending this information to the engine control module (ECM). The ECM uses this data to adjust the air-fuel mixture for optimal combustion. When the sensor detects a rich mixture, it means there is an excess of fuel compared to the amount of air entering the combustion chamber. This can lead to poor fuel economy, increased emissions, and potential damage to the catalytic converter.
Common Causes of P1138 2002 Ford F150
- Faulty heated oxygen sensor (Bank 1 Sensor 2)
- Wiring or connector issues in the HO2S circuit
- Exhaust system leaks
- Fuel pressure regulator malfunction
- Engine vacuum leaks
Symptoms of P1138 2002 Ford F150
- Decreased fuel efficiency
- Rough idling or stalling
- Engine misfires
- Check Engine Light illuminated
- Strong fuel smell from the exhaust
How to Fix P1138 2002 Ford F150
- Diagnose the issue by using a scan tool to monitor the oxygen sensor readings.
- Inspect the wiring and connectors for any damage or corrosion. Repair or replace as necessary.
- Test the heated oxygen sensor to ensure it is functioning correctly. Replace if faulty.
- Check for exhaust leaks and repair any found.
- Verify the fuel pressure regulator and engine vacuum system are working properly.
Cost to Fix P1138 2002 Ford F150
The cost of repairing a P1138 code on a 2002 Ford F150 can vary depending on the specific cause of the issue. On average, the parts for a new heated oxygen sensor can range from $50 to $200, while the labor costs can be between $80 and $150 per hour. Overall, the total repair cost can range from $150 to $500 or more, depending on the extent of the repairs needed. It is recommended to consult a professional mechanic for an accurate diagnosis and cost estimate.
Need more information about the P1138 2002 Ford F150 code?
Need more information on how to fix the P1138 2002 Ford F150 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1138 2002 Ford F150 code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1138 2002 Ford F150 Code
1. What are common symptoms of OBDII code P1138 on a 2002 Ford F150?
The common symptoms include poor fuel economy, rough idling, and the Check Engine light illuminating on the dashboard.
2. What does the OBDII code P1138 on a 2002 Ford F150 indicate?
The code P1138 indicates that the Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2 is detecting a rich air-fuel mixture in the exhaust system.
3. What are the possible causes of OBDII code P1138 on a 2002 Ford F150?
Possible causes include a faulty HO2S Bank 1 Sensor 2, issues with the fuel system such as a leaking injector or fuel pressure regulator, or a problem with the engine's air intake system.
4. How can I diagnose the OBDII code P1138 on my 2002 Ford F150?
Diagnosing the code involves using an OBDII scanner to retrieve the code, checking the live data for the HO2S Bank 1 Sensor 2, and performing a visual inspection of the sensor and related components.
5. What are some repair tips for fixing OBDII code P1138 on a 2002 Ford F150?
Repair tips include replacing the faulty HO2S Bank 1 Sensor 2, addressing any fuel system issues, checking and cleaning the MAF sensor, and ensuring there are no vacuum leaks in the intake system.
6. Can I continue driving my 2002 Ford F150 with the OBDII code P1138?
It is not recommended to continue driving with the P1138 code present, as it can lead to decreased fuel efficiency and potential damage to the catalytic converter over time.
7. How much does it typically cost to repair OBDII code P1138 on a 2002 Ford F150?
The cost of repair can vary depending on the exact cause of the code, but it may range from $200 to $500 for parts and labor.
8. Are there any recalls or technical service bulletins related to OBDII code P1138 on a 2002 Ford F150?
It's advisable to check with a Ford dealership or online resources for any recalls or technical service bulletins related to the specific issue indicated by code P1138 on the 2002 Ford F150.
9. Can a DIY enthusiast fix the OBDII code P1138 on a 2002 Ford F150?
Depending on the skill level and tools available, some DIY enthusiasts may be able to address the P1138 code by following repair guides and using the necessary diagnostic equipment.
10. How often should the Heated Oxygen Sensor Bank 1 Sensor 2 be replaced on a 2002 Ford F150?
The HO2S Bank 1 Sensor 2 should typically be inspected and replaced if necessary according to the manufacturer's recommended maintenance schedule, usually around 60,000 to 100,000 miles.
Discuss the causes and fixes for P1138 2002 Ford F150 OBDII Code
Code P1138 2002 Ford F150 comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.