AutoCodes – Ford – P1158 1997 Ford F150

P1158 1997 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 1997 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 1,933

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 1997 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 1997 Ford F150 - Lack Of Heated Oxygen Sensor Switches Bank 2 Sensor 2 Indicates Rich - AutoCodes.com — P1158 1997 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 1997 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 1997 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 1997 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 1997 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 1997 Ford F150 Code

1. What does the OBDII code P1158 mean on a 1997 Ford F150?

P1158 indicates that the heated oxygen sensor (HO2S) for Bank 2 Sensor 2 is detecting a consistently rich air-fuel mixture and is not switching properly.

2. What are the common symptoms of the P1158 code in a 1997 Ford F150?

Symptoms may include poor fuel economy, rough idle, black exhaust smoke, a lit check engine light, and potential performance issues.

3. What causes the P1158 code to appear on a 1997 Ford F150?

Common causes include a faulty oxygen sensor, issues with the sensor's wiring or connectors, a leaking fuel injector, a malfunctioning fuel pressure regulator, or a vacuum leak.

4. Can a bad oxygen sensor trigger the P1158 code?

Yes, a malfunctioning heated oxygen sensor (HO2S) is one of the most common reasons for the P1158 code to appear.

5. How do you diagnose a P1158 code on a 1997 Ford F150?

Diagnosis involves using an OBDII scanner to confirm the code, visually inspecting the sensor and its wiring, checking for exhaust or vacuum leaks, and testing the oxygen sensor's operation with a multimeter.

6. Is it safe to drive with the P1158 code on a 1997 Ford F150?

Driving with this code for a short time may not cause immediate damage, but prolonged driving can lead to engine inefficiency, increased emissions, and potential damage to the catalytic converter.

7. How do you fix the P1158 code on a 1997 Ford F150?

Repairs may include replacing the faulty oxygen sensor, repairing damaged wiring or connectors, addressing fuel system leaks, or fixing vacuum leaks.

8. Which sensor does Bank 2 Sensor 2 refer to on a 1997 Ford F150?

Bank 2 refers to the side of the engine opposite cylinder 1, and Sensor 2 is the downstream oxygen sensor located after the catalytic converter.

9. Can a dirty air filter cause the P1158 code on a 1997 Ford F150?

While unlikely, a severely clogged air filter can contribute to an overly rich air-fuel mixture, which might exacerbate the issue.

10. How much does it cost to fix a P1158 code on a 1997 Ford F150?

The cost depends on the specific issue. Replacing an oxygen sensor typically costs between $100 and $300, while repairing wiring or addressing fuel system problems may vary.