AutoCodes – Ford – P1158 Ford

P1158 Ford 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 Ford 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 10,886

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

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 Ford?

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 Ford 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 Ford code?

Need more information on how to fix the P1158 Ford code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1158 Ford code diagnosed by a professional: Find a repair shop in your area

Information for Specific Ford Models

P1158 1997 Ford F150 — Lack Of Heated Oxygen Sensor Switches Bank 2 Sensor 2 Indicates Rich
P1158 1998 Ford F150 — Lack Of Heated Oxygen Sensor Switches Bank 2 Sensor 2 Indicates Rich
P1158 1999 Ford F150 — Lack Of Heated Oxygen Sensor Switches Bank 2 Sensor 2 Indicates Rich
P1158 2000 Ford F150 — Lack Of Heated Oxygen Sensor Switches Bank 2 Sensor 2 Indicates Rich
P1158 2001 Ford F150 — Lack Of Heated Oxygen Sensor Switches Bank 2 Sensor 2 Indicates Rich
P1158 2002 Ford F150 — Lack Of Heated Oxygen Sensor Switches Bank 2 Sensor 2 Indicates Rich
P1158 2003 Ford F150 — Lack Of Heated Oxygen Sensor Switches Bank 2 Sensor 2 Indicates Rich

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 Ford Code

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

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

2. What does the OBDII code P1158 for a Ford mean?

- The code indicates that the heated oxygen sensor switch for Bank 2 Sensor 2 is detecting a rich air-fuel mixture.

3. What are the possible causes of OBDII code P1158 in a Ford?

- Potential causes include a faulty oxygen sensor, issues with the fuel injectors, a vacuum leak, or problems with the engine's air intake system.

4. How can I diagnose the OBDII code P1158 in my Ford?

- Diagnosing the code involves using an OBDII scanner to read the code, checking the oxygen sensor's wiring, and inspecting the fuel system components.

5. Can a dirty air filter trigger the OBDII code P1158 in a Ford?

- Yes, a dirty air filter can disrupt the air-fuel mixture ratio and potentially lead to a rich condition detected by the oxygen sensor.

6. What are some repair tips for addressing OBDII code P1158 in a Ford?

- Repair tips may include replacing the oxygen sensor, cleaning or replacing the air filter, checking for vacuum leaks, and ensuring proper functioning of the fuel injectors.

7. Is it safe to continue driving with the OBDII code P1158 illuminated in my Ford?

- It is not recommended to ignore the code, as a rich air-fuel mixture can cause damage to the engine components and lead to more serious issues over time.

8. Can a bad catalytic converter trigger the OBDII code P1158 in a Ford?

- A malfunctioning catalytic converter can contribute to a rich air-fuel mixture, potentially triggering the P1158 code.

9. How important is it to address the OBDII code P1158 promptly in a Ford vehicle?

- Addressing the code promptly is crucial to prevent further damage to the engine, ensure optimal fuel efficiency, and maintain overall vehicle performance.

10. Will resetting the OBDII code P1158 in a Ford make the issue go away permanently?

- Simply resetting the code may temporarily turn off the check engine light, but it will not fix the underlying issue causing the rich air-fuel mixture detected by the oxygen sensor.