AutoCodes – Suzuki – P0059 Suzuki

P0059 Suzuki Code - HO2S21 Heater Control Circuit Low/High/Heater Resistance

Quick Answer

The Heated Oxygen Sensor (HO2S) must reach the operating temperature to provide an accurate voltage signal. Common causes include Faulty heated oxygen sensor, Heated oxygen sensor harness open or shorted, Heated oxygen sensor circuit poor connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: P0059 Suzuki indicates HO2S21 Heater Control Circuit Low/High/Heater Resistance.
Common causes: Common causes include Faulty heated oxygen sensor, Heated oxygen sensor harness open or shorted, Heated oxygen sensor circuit poor connection.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

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Code Popularity 4,441

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 13, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0059 Suzuki Description

The Heated Oxygen Sensor (HO2S) must reach the operating temperature to provide an accurate voltage signal. A heating element inside the HO2S minimizes the time required for the sensor to reach operating temperature. With the engine running, the ground is provided to the heater by the HO2S heater low control circuit through a low side driver within the Powertrain Control Module (PCM). The PCM commands the heater ON or OFF to maintain a specific HO2S operating temperature range. The PCM determines the temperature by measuring the current flow through the heater. When the heater is in the ON state, the PCM will pulse the heater OFF for 50 ms, once per second. The PCM calculates the heater resistance on a cold start. The Diagnostic Trouble Code (DTC) will set if the heater current requirements too low or high in the HO2S heater control circuit.

OBDII Code P0059 Suzuki - HO2S21 Heater Control Circuit Low/High/Heater Resistance - AutoCodes.com — P0059 Suzuki Code - HO2S21 Heater Control Circuit Low/High/Heater Resistance

What does this mean?

What are the Possible Causes of the DTC P0059 Suzuki?

Faulty heated oxygen sensor
Heated oxygen sensor harness open or shorted
Heated oxygen sensor circuit poor connection

How to Fix the DTC P0059 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 P0059 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 P0059 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 P0059 Suzuki Code

1. What are the common symptoms of OBDII code P0059 in a Suzuki vehicle?

- Common symptoms include poor fuel economy, rough idling, engine misfires, and the illumination of the Check Engine Light.

2. What does the OBDII code P0059, HO2S21 Heater Control Circuit Low/High/Heater Resistance, mean for a Suzuki car?

- This code indicates an issue with the oxygen sensor (HO2S21) heater control circuit, specifically relating to low/high voltage or abnormal heater resistance.

3. What are the possible causes of the P0059 code in a Suzuki vehicle?

- The code P0059 in a Suzuki can be triggered by a faulty oxygen sensor, damaged wiring or connectors, a blown fuse, or issues with the ECM (Engine Control Module).

4. How serious is the OBDII code P0059 in a Suzuki car?

- While the car may still be operable with this code, it is important to address it promptly to prevent further damage to the engine and emissions system.

5. How can I diagnose the OBDII code P0059 in my Suzuki vehicle?

- Diagnosing the P0059 code involves checking the oxygen sensor heater circuit for continuity, inspecting wiring for damage, and testing the sensor's resistance and voltage.

6. Can I drive my Suzuki with the OBDII code P0059?

- It is generally safe to drive your Suzuki with the P0059 code, but it is recommended to address the issue as soon as possible to avoid potential engine performance issues.

7. How much does it typically cost to repair the P0059 code in a Suzuki?

- The cost of repairing the P0059 code in a Suzuki can vary depending on the exact cause, but it may range from $150 to $400, including parts and labor.

8. Can I fix the OBDII code P0059 in my Suzuki at home?

- If you have the necessary tools and automotive knowledge, you may be able to fix the P0059 code at home by replacing the oxygen sensor or repairing the wiring yourself.

9. Will resetting the OBDII code P0059 in my Suzuki make it go away permanently?

- Resetting the code may temporarily turn off the Check Engine Light, but if the underlying issue is not resolved, the code is likely to reappear during driving.

10. How long can I safely ignore the OBDII code P0059 in my Suzuki before getting it fixed?

- It is not recommended to ignore the P0059 code for an extended period, as it can lead to reduced fuel efficiency, engine performance issues, and potential damage to the catalytic converter.