AutoCodes – Ford – P1158 2001 Ford F150

P1158 2001 Ford F150 Code - Lack Of Heated Oxygen Sensor Switches Bank 2 Sensor 2 Indicates Rich

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 2, Heated Oxygen Sensor 2 Bank 2 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: P1158 2001 Ford F150 indicates Lack Of Heated Oxygen Sensor Switches Bank 2 Sensor 2 Indicates Rich.
Common causes: Common causes include Exhaust gas leaks, Faulty Heated Oxygen Sensor 2 (HO2S2) (Downstream) Bank 2, Heated Oxygen Sensor 2 Bank 2 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 2,324

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 P1158 2001 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 P1158 code will set when the PCM detects that the HO2S2 signal is above the voltage of range for an extended period.

OBDII Code P1158 2001 Ford F150 - Lack Of Heated Oxygen Sensor Switches Bank 2 Sensor 2 Indicates Rich - AutoCodes.com — P1158 2001 Ford F150 Code - Lack Of Heated Oxygen Sensor Switches Bank 2 Sensor 2 Indicates Rich

What does this mean?

What are the Possible Causes of the DTC P1158 2001 Ford F150?

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

How to Fix the DTC P1158 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 P1158 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.

Need more information about the P1158 2001 Ford F150 code?

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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 P1158 2001 Ford F150 Code

1. What are the common symptoms of OBDII code P1158 on a 2001 Ford F150?

- Common symptoms include decreased fuel efficiency, rough idling, and a noticeable decrease in engine performance.

2. What does the OBDII code P1158 "Lack Of Heated Oxygen Sensor Switches Bank 2 Sensor 2 Indicates Rich" mean?

- This code indicates that the oxygen sensor located after the catalytic converter on bank 2, sensor 2, is detecting a rich air-fuel mixture.

3. What are the possible causes of OBDII code P1158 on a 2001 Ford F150?

- Common causes include a faulty oxygen sensor, a leaking fuel injector, a malfunctioning mass airflow sensor, or an issue with the engine's air intake system.

4. How can I diagnose the OBDII code P1158 on my 2001 Ford F150?

- Diagnosing this code typically involves using an OBDII scanner to read the code and then performing further tests on the oxygen sensor, fuel injectors, and other related components.

5. What are the repair options for resolving OBDII code P1158 on a 2001 Ford F150?

- Repairs may involve replacing the oxygen sensor, fixing any fuel injector leaks, cleaning or replacing the mass airflow sensor, or addressing any intake system issues.

6. Can I continue driving my 2001 Ford F150 with OBDII code P1158 present?

- It is generally not recommended to continue driving with this code active, as it can lead to further damage to the engine and negatively impact fuel efficiency.

7. How can I prevent OBDII code P1158 from occurring on my 2001 Ford F150 in the future?

- Regular maintenance, such as timely replacement of oxygen sensors and cleaning of fuel injectors, can help prevent this code from reoccurring.

8. Is it safe to reset the OBDII code P1158 on a 2001 Ford F150 using an OBDII scanner?

- While resetting the code may temporarily turn off the check engine light, it is important to diagnose and address the underlying issue causing the code to prevent further problems.

9. Can a DIY enthusiast fix OBDII code P1158 on a 2001 Ford F150, or is professional help recommended?

- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to address this code themselves. However, professional help is often recommended for accurate diagnosis and repair.

10. How much can I expect to pay for repairing OBDII code P1158 on a 2001 Ford F150 at a mechanic or dealership?

- The cost of repairing this code can vary depending on the specific issue causing it. It is best to consult with a mechanic or dealership for an accurate estimate based on your vehicle's condition.