AutoCodes – Ford – P1137 2002 Ford F150

P1137 2002 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 2002 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.

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Code Popularity 2,908

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
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Code P1137 2002 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 2002 Ford F150 - Lack Of Heated Oxygen Sensor Switches Bank 1 Sensor 2 Switch Indicates Lean - AutoCodes.com — P1137 2002 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 2002 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 2002 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 2002 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 2002 Ford F150 code?

Need more information on how to fix the P1137 2002 Ford F150 code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 P1137 2002 Ford F150 Code

1. What does the OBDII code P1137 mean on a 2002 Ford F150?

The code P1137 indicates that the heated oxygen sensor (HO2S) for Bank 1 Sensor 2 is not switching properly and is detecting a lean condition.

2. What are the symptoms of code P1137 on a 2002 Ford F150?

Symptoms may include poor fuel efficiency, rough idle, hesitation during acceleration, and an illuminated check engine light.

3. What causes the P1137 code on a 2002 Ford F150?

Common causes include a faulty oxygen sensor, exhaust leaks, vacuum leaks, a malfunctioning fuel injector, or a failing fuel pump.

4. Which sensor is Bank 1 Sensor 2 on a 2002 Ford F150?

Bank 1 Sensor 2 refers to the downstream oxygen sensor located after the catalytic converter on the side of the engine with cylinder 1.

5. Can a dirty air filter cause the P1137 code on a 2002 Ford F150?

Yes, a clogged or dirty air filter can cause a lean condition by restricting airflow, which may trigger the P1137 code.

6. How do I diagnose the P1137 code on a 2002 Ford F150?

Start by checking for exhaust leaks, inspecting the oxygen sensor wiring, testing the sensor with a multimeter, and ensuring there are no vacuum leaks or fuel delivery issues.

7. Should I replace the oxygen sensor to fix the P1137 code?

If the oxygen sensor is faulty or has damaged wiring, replacing it may resolve the issue, but diagnosing other potential causes is recommended first.

8. Can a bad catalytic converter cause the P1137 code on a 2002 Ford F150?

While rare, a failing catalytic converter can sometimes affect downstream oxygen sensor readings and trigger the P1137 code.

9. How much does it cost to fix the P1137 code on a 2002 Ford F150?

Repair costs vary depending on the issue, but replacing a downstream oxygen sensor typically costs $150-$300, including parts and labor.

10. Is it safe to drive with the P1137 code on a 2002 Ford F150?

Driving with the P1137 code may result in reduced fuel efficiency and performance. Itâ€™s best to address the issue promptly to avoid potential damage.