AutoCodes – Ford – P1158 1999 Ford F150

P1158 1999 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 1999 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 2,239

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 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 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 1999 Ford F150 - Lack Of Heated Oxygen Sensor Switches Bank 2 Sensor 2 Indicates Rich - AutoCodes.com — P1158 1999 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 1999 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 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 P1158 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 P1158 1999 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 1999 Ford F150 Code

1. What are the common symptoms of OBDII code P1158 in a 1999 Ford F150?

- Common symptoms include poor fuel economy, rough idling, decreased engine performance, and illuminated Check Engine Light.

2. What does the OBDII code P1158 for a 1999 Ford F150 indicate?

- The code indicates a lack of activity from the heated oxygen sensor (HO2S) on Bank 2 Sensor 2, suggesting a rich air-fuel mixture.

3. What are the possible causes of the Lack Of Heated Oxygen Sensor Switches Bank 2 Sensor 2 Indicates Rich code?

- Possible causes include a faulty HO2S, wiring issues, exhaust leaks, fuel pressure problems, or an incorrect air-fuel mixture.

4. How can I diagnose the source of the P1158 code in my 1999 Ford F150?

- Diagnose by inspecting the HO2S, checking for wiring damage, performing a fuel pressure test, and ensuring there are no exhaust leaks.

5. Can a dirty or contaminated HO2S cause the P1158 code in a 1999 Ford F150?

- Yes, a dirty or contaminated HO2S can lead to inaccurate sensor readings, triggering the P1158 code.

6. How can I reset the Check Engine Light after repairing the issue related to code P1158?

- You can reset the Check Engine Light using an OBDII scanner or by disconnecting the car's battery for a few minutes.

7. Is it safe to continue driving my 1999 Ford F150 with the P1158 code present?

- It is not recommended to drive with the P1158 code as it can lead to decreased fuel efficiency and potential damage to the engine over time.

8. Are there any DIY repair tips for resolving the Lack Of Heated Oxygen Sensor Switches Bank 2 Sensor 2 Indicates Rich code?

- DIY repair tips include checking and cleaning the sensor connections, inspecting the wiring for damage, and ensuring proper fuel system operation.

9. How much does it typically cost to repair the P1158 code in a 1999 Ford F150 at a mechanic or dealership?

- Repair costs for the P1158 code can vary depending on the exact cause, but they can range from $100 to $500 or more, including parts and labor.

10. Can a malfunctioning O2 sensor lead to other issues in a 1999 Ford F150 if not addressed promptly?

- Yes, a malfunctioning O2 sensor can cause poor engine performance, decreased fuel efficiency, and potential damage to the catalytic converter if left unresolved.