AutoCodes – Ford – P1158 2002 Ford F150

P1158 2002 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 2002 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 2,218

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 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 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 2002 Ford F150 - Lack Of Heated Oxygen Sensor Switches Bank 2 Sensor 2 Indicates Rich - AutoCodes.com — P1158 2002 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 2002 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 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 P1158 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 P1158 2002 Ford F150 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 2002 Ford F150 Code

1. What are the common symptoms of OBDII code P1158 on a 2002 Ford F150?

The common symptoms of code P1158 may include decreased fuel efficiency, rough idling, and a noticeable decrease in engine performance.

2. What does the OBDII code P1158 in a 2002 Ford F150 mean?

Code P1158 indicates that the heated oxygen sensor (HO2S) located on Bank 2 Sensor 2 is detecting a rich air-fuel mixture in the exhaust system.

3. What are the possible causes of OBDII code P1158 on a 2002 Ford F150?

Possible causes of code P1158 include a faulty HO2S, wiring issues in the sensor circuit, a vacuum leak, a malfunctioning fuel injector, or a problem with the engine's air intake system.

4. How can I diagnose OBDII code P1158 on my 2002 Ford F150?

Diagnosing code P1158 typically involves using an OBDII scanner to retrieve the code, inspecting the HO2S sensor and its wiring for any visible damage, and performing tests to identify the root cause of the rich air-fuel mixture.

5. Can I continue driving my 2002 Ford F150 with OBDII code P1158?

It is not recommended to continue driving your vehicle with code P1158 present, as it can lead to further engine damage and decreased fuel efficiency. It is best to address the issue promptly.

6. How can I repair OBDII code P1158 on my 2002 Ford F150?

Repairing code P1158 may involve replacing the faulty HO2S sensor, repairing any damaged wiring in the sensor circuit, fixing vacuum leaks, addressing fuel injector issues, or repairing problems in the air intake system.

7. Will resetting the OBDII system clear code P1158 on my 2002 Ford F150?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing code P1158 is not addressed, the code is likely to reappear during driving cycles.

8. Is it possible to prevent OBDII code P1158 from appearing on my 2002 Ford F150?

Regular maintenance, including timely replacement of oxygen sensors and addressing any engine performance issues promptly, can help prevent code P1158 from appearing on your vehicle.

9. Can a DIY enthusiast fix OBDII code P1158 on a 2002 Ford F150?

Depending on their skill level and access to tools, a DIY enthusiast may be able to diagnose and repair code P1158. However, if unsure, it is recommended to seek professional assistance.

10. How much can I expect to pay to fix OBDII code P1158 on my 2002 Ford F150?

The cost of fixing code P1158 can vary depending on the underlying issue. It may range from a few hundred dollars for a sensor replacement to more if additional repairs are needed.