AutoCodes – Ford – P1137 1999 Ford F150

P1137 1999 Ford F150 Code - Lack Of Heated Oxygen Sensor Switches Bank 1 Sensor 2 Switch Indicates Lean

Quick Answer

The Heated Oxygen Sensor 2 (HO2S2) (Downstream), after the three-way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. Common causes include Exhaust gas leaks, Faulty Heated Oxygen Sensor 2 (HO2S2) (Downstream) Bank 1, Heated Oxygen Sensor 2 Bank 1 harness is open or shorted. 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: P1137 1999 Ford F150 indicates Lack Of Heated Oxygen Sensor Switches Bank 1 Sensor 2 Switch Indicates Lean.
Common causes: Common causes include Exhaust gas leaks, Faulty Heated Oxygen Sensor 2 (HO2S2) (Downstream) Bank 1, Heated Oxygen Sensor 2 Bank 1 harness is open or shorted.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 2,708

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 Jul 24, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1137 1999 Ford F150 Description

The Heated Oxygen Sensor 2 (HO2S2) (Downstream), after the three-way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. For optimum catalyst operation, the air-fuel mixture (air-fuel ratio) must maintain near the ideal stoichiometric ratio. The HO2S2 output voltage changes suddenly in the vicinity of the stoichiometric ratio. The Powertrain Control Module (PCM) adjusts the fuel injection time so that the air-fuel ratio is nearly stoichiometric. The HO2S2 generates a voltage between 0.1 and 0.9 V in response to oxygen in the exhaust gas. If the oxygen in the exhaust gas increases, the air-fuel ratio becomes Lean. The PCM interprets Lean when the HO2S2 voltage is below 0.45 V. If the oxygen in the exhaust gas decreases, the air-fuel ratio becomes Rich. The PCM interprets Rich when the HO2S2 voltage is above 0.45 V. The P1137 code will set when the PCM detects that the HO2S2 signal is below the voltage of range for an extended period.

OBDII Code P1137 1999 Ford F150 - Lack Of Heated Oxygen Sensor Switches Bank 1 Sensor 2 Switch Indicates Lean - AutoCodes.com — P1137 1999 Ford F150 Code - Lack Of Heated Oxygen Sensor Switches Bank 1 Sensor 2 Switch Indicates Lean

What does this mean?

What are the Possible Causes of the DTC P1137 1999 Ford F150?

Exhaust gas leaks
Faulty Heated Oxygen Sensor 2 (HO2S2) (Downstream) Bank 1
Heated Oxygen Sensor 2 Bank 1 harness is open or shorted
Heated Oxygen Sensor 2 Bank 1 circuit poor electrical connection
Inappropriate fuel pressure
Faulty fuel injectors

How to Fix the DTC P1137 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1137 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 P1137 1999 Ford F150 code?

Need more information on how to fix the P1137 1999 Ford F150 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1137 1999 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 P1137 1999 Ford F150 Code

1. What are the common symptoms of OBDII code P1137 in a 1999 Ford F150?

- Common symptoms include poor fuel economy, rough idling, hesitation or jerking during acceleration, and the illumination of the Check Engine Light.

2. What does the OBDII code P1137 "Lack Of Heated Oxygen Sensor Switches Bank 1 Sensor 2 Switch Indicates Lean" mean?

- This code indicates that the oxygen sensor downstream of the catalytic converter on bank 1 is not operating properly, causing the engine to run lean.

3. What are the possible causes of OBDII code P1137 in a 1999 Ford F150?

- Common causes include a faulty oxygen sensor, a vacuum leak, a clogged fuel filter, a malfunctioning catalytic converter, or issues with the fuel system.

4. How can I diagnose the OBDII code P1137 in my 1999 Ford F150?

- Diagnosis typically involves using an OBDII scanner to read the code, inspecting the oxygen sensor and related components, checking for vacuum leaks, and testing the fuel system.

5. Can I continue to drive my 1999 Ford F150 with OBDII code P1137 active?

- It is not recommended to drive with this code active, as it can lead to poor engine performance, increased emissions, and potential damage to the catalytic converter.

6. How can I repair OBDII code P1137 in my 1999 Ford F150?

- Repair options may include replacing the oxygen sensor, fixing any vacuum leaks, replacing the fuel filter, repairing or replacing the catalytic converter, or addressing any fuel system issues.

7. Will resetting the Check Engine Light make the OBDII code P1137 go away?

- Resetting the Check Engine Light may temporarily turn it off, but the underlying issue causing code P1137 will still need to be diagnosed and repaired to prevent it from returning.

8. How much does it typically cost to repair OBDII code P1137 in a 1999 Ford F150?

- The cost of repairs can vary depending on the specific cause of the code, but it may range from $100 to $500 or more, including parts and labor.

9. Can a DIY enthusiast fix OBDII code P1137 in a 1999 Ford F150?

- Depending on the mechanical skills and tools available, some DIY enthusiasts may be able to diagnose and repair this code themselves, while others may prefer to seek professional help.

10. How often does OBDII code P1137 occur in a 1999 Ford F150?

- The occurrence of this code can vary depending on the vehicle's maintenance history, driving conditions, and other factors, but it is not uncommon in older vehicles like the 1999 Ford F150.