AutoCodes – Mazda – P1158 Mazda

P1158 Mazda Code - HO2S-22 Circuit Condition

Quick Answer

P1158 Mazda indicates HO2S-22 Circuit Condition. Common causes include Faulty HO2S-22, HO2S-22 harness is open or shorted, HO2S-22 circuit poor electrical connection. 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 Mazda indicates HO2S-22 Circuit Condition.
Common causes: Common causes include Faulty HO2S-22, HO2S-22 harness is open or shorted, HO2S-22 circuit poor electrical connection.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 3,297

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 May 21, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1158 Mazda Description

OBDII Code P1158 Mazda - HO2S-22 Circuit Condition - AutoCodes.com — P1158 Mazda Code - HO2S-22 Circuit Condition

What does this mean?

What are the Possible Causes of the DTC P1158 Mazda?

Faulty HO2S-22
HO2S-22 harness is open or shorted
HO2S-22 circuit poor electrical connection

How to Fix the DTC P1158 Mazda?

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 does this mean?

Code Tech Notes

The Engine Control Module (ECM) did not detect rich signal while testing

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1158 Mazda 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 Mazda code?

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

Need Help with the Code?

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

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 Mazda Code

1. What does the OBDII code P1158 mean for a Mazda?

P1158 indicates an issue with the HO2S-22 sensor circuit, specifically the heated oxygen sensor on Bank 2, Sensor 2, which monitors exhaust gases to optimize fuel efficiency and emissions.

2. What are the common symptoms of a P1158 code in a Mazda?

Symptoms may include poor fuel economy, reduced engine performance, rough idling, and the check engine light illuminating.

3. What causes the P1158 code to appear in a Mazda?

Possible causes include a faulty oxygen sensor, damaged wiring or connectors, exhaust leaks, or an issue with the engine control module (ECM).

4. Can a dirty or clogged oxygen sensor cause the P1158 code?

Yes, a dirty or clogged oxygen sensor can result in incorrect readings, triggering the P1158 code.

5. How can I diagnose the P1158 code on my Mazda?

Start by inspecting the wiring and connectors for the HO2S-22 sensor, checking for damage or corrosion. Use an OBDII scanner to monitor sensor readings and confirm its condition.

6. Is it safe to drive my Mazda with a P1158 code?

While it might be possible to drive, ignoring the code can lead to decreased fuel efficiency, higher emissions, and potential engine damage over time.

7. How do I fix the P1158 code in a Mazda?

Repairs may include replacing the faulty oxygen sensor, repairing damaged wiring, fixing exhaust leaks, or updating/reprogramming the ECM.

8. How much does it cost to fix a P1158 code on a Mazda?

The repair cost depends on the issue, but replacing an oxygen sensor typically ranges from $150 to $400, including parts and labor.

9. Can a P1158 code reappear after repairs?

Yes, the code can reappear if the underlying issue, such as exhaust leaks or ECM problems, is not fully resolved.

10. Do I need professional help to fix the P1158 code on my Mazda?

If you're experienced with car repairs, you might handle simple fixes like replacing an oxygen sensor. For complex diagnostics or ECM issues, professional help is recommended.