AutoCodes – Suzuki – P1151 Suzuki

P1151 Suzuki Code - HO2S21 Circuit Low Voltage Shift/High Voltage Shift/Circuit Continuity/High Voltage

Quick Answer

P1151 Suzuki indicates HO2S21 Circuit Low Voltage Shift/High Voltage Shift/Circuit Continuity/High Voltage. Common causes include Faulty Rear Oxygen Sensor, Rear Oxygen Sensor harness is open or shorted, Rear Oxygen Sensor 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: P1151 Suzuki indicates HO2S21 Circuit Low Voltage Shift/High Voltage Shift/Circuit Continuity/High Voltage.
Common causes: Common causes include Faulty Rear Oxygen Sensor, Rear Oxygen Sensor harness is open or shorted, Rear Oxygen Sensor 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.

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Code Popularity 2,738

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 03, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1151 Suzuki Description

OBDII Code P1151 Suzuki - HO2S21 Circuit Low Voltage Shift/High Voltage Shift/Circuit Continuity/High Voltage - AutoCodes.com — P1151 Suzuki Code - HO2S21 Circuit Low Voltage Shift/High Voltage Shift/Circuit Continuity/High Voltage

What does this mean?

What are the Possible Causes of the DTC P1151 Suzuki?

Faulty Rear Oxygen Sensor
Rear Oxygen Sensor harness is open or shorted
Rear Oxygen Sensor circuit poor electrical connection

How to Fix the DTC P1151 Suzuki?

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 P1151 Suzuki 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.

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Need more information on how to fix the P1151 Suzuki code? Get Access to Factory Service Manuals

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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 P1151 Suzuki Code

1. What are the common symptoms of OBDII code P1151 on a Suzuki vehicle?

- Common symptoms include decreased fuel efficiency, rough idling, engine misfires, and the illumination of the check engine light.

2. What are the possible causes of OBDII code P1151 on a Suzuki vehicle?

- The code P1151 on a Suzuki typically indicates issues with the HO2S21 sensor, such as low voltage shift, high voltage shift, circuit continuity problems, or high voltage readings.

3. How can I diagnose the HO2S21 sensor related issues causing OBDII code P1151 on my Suzuki?

- Diagnosing HO2S21 sensor issues involves checking the wiring harness for damage, testing the sensor's voltage output, and scanning for any other related trouble codes.

4. What are some repair tips for resolving OBDII code P1151 on a Suzuki due to HO2S21 sensor problems?

- Repair tips may include replacing the HO2S21 sensor, repairing or replacing damaged wiring, cleaning electrical connections, and resetting the engine control module after repairs.

5. Can a faulty catalytic converter cause OBDII code P1151 on a Suzuki?

- Yes, a faulty catalytic converter can sometimes trigger code P1151 if it causes abnormal readings from the HO2S21 sensor due to improper exhaust gas processing.

6. Is it safe to continue driving my Suzuki with OBDII code P1151 present?

- It is generally not recommended to continue driving with code P1151 as it can lead to poor engine performance and potential long-term damage if left unresolved.

7. How much does it typically cost to repair OBDII code P1151 related issues on a Suzuki?

- The cost of repairs for code P1151 can vary depending on the exact cause, but it may range from $100 to $300 for parts and labor.

8. Can I reset the check engine light after fixing OBDII code P1151 on my Suzuki?

- Yes, you can reset the check engine light using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes to clear the stored trouble codes.

9. Are there any preventive maintenance steps I can take to avoid OBDII code P1151 on my Suzuki?

- Regularly servicing the vehicle, using high-quality fuel, and inspecting the exhaust system can help prevent issues that may trigger code P1151.

10. Should I attempt to diagnose and repair OBDII code P1151 on my Suzuki myself, or seek professional help?

- While some DIY enthusiasts may be able to diagnose and fix code P1151, it's often recommended to seek professional help, especially if you're not familiar with automotive diagnostics and repairs.