AutoCodes – Generic – P0059

P0059 Code - HO2S Heater Resistance Bank 2 Sensor 1

Quick Answer

Heated Oxygen Sensors (HO2S) are used for fuel control and post catalyst monitoring. Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1, Heated Oxygen Sensor Bank 2 Sensor 1 harness is open shorted, Heated Oxygen Sensor Bank 2 Sensor 1 circuit poor electrical 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 indicates HO2S Heater Resistance Bank 2 Sensor 1.
Common causes: Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1, Heated Oxygen Sensor Bank 2 Sensor 1 harness is open shorted, Heated Oxygen Sensor Bank 2 Sensor 1 circuit poor electrical 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.

Save to My Repairs My Repairs

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

Code Popularity 29,987

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 Mar 23, 2024

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 P0059 Description

Heated Oxygen Sensors (HO2S) are used for fuel control and post catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content in the exhaust stream. The HO2S must reach an operating temperature to provide an accurate voltage signal. A heating element inside the HO2S minimizes the time required for the sensors to reach operating temperature. Voltage is provided to the heater by an ignition voltage circuit through a fuse. 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 Engine Control Module (ECM). The ECM uses Pulse Width Modulation (PWM) to control the HO2S heater operation to maintain a specific HO2S operating temperature range.
The Diagnostic Trouble Code (DTC) will be set when the ECM detects the HO2S heater is not within a specified resistance range at engine start-up.

OBDII Code P0059 - HO2S Heater Resistance Bank 2 Sensor 1 - AutoCodes.com — P0059 Code - HO2S Heater Resistance Bank 2 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P0059?

Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1
Heated Oxygen Sensor Bank 2 Sensor 1 harness is open shorted
Heated Oxygen Sensor Bank 2 Sensor 1 circuit poor electrical connection
Heated Oxygen Sensor Bank 2 Sensor 1 circuit fuse
Faulty Engine Control Module (ECM)

How to Fix the DTC P0059?

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 code means that there is a problem with the heater element circuit of the heated oxygen sensor. The control module monitors how long it takes the sensor to warm up and start sending an adequate signal. The code is set when the sensor is taking too long to warm up. Water getting inside the heated oxygen sensor connector can cause the heated oxygen sensor fuse to blow. Before replacing the sensor, check for the condition of the heated oxygen sensor fuse and connectors. If the fuse and connector are OK, replacing the O2 Sensor usually takes care of the problem.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0059 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 P0059 code?

Need more information on how to fix the P0059 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0059 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P0059 Buick — HO2S Heater Resistance Bank 2 Sensor 1
P0059 Cadillac — HO2S Heater Resistance Bank 2 Sensor 1
P0059 Chevrolet — HO2S Heater Resistance Bank 2 Sensor 1
P0059 Ford — HO2S Heater Resistance Bank 2 Sensor 1
P0059 GMC — HO2S Heater Resistance Bank 2 Sensor 1
P0059 Hummer — HO2S Heater Resistance Bank 2 Sensor 1
P0059 Lincoln — HO2S Heater Resistance Bank 2 Sensor 1
P0059 Mazda — HO2S21 Heater Control Circuit Fault
P0059 Mercury — HO2S Heater Resistance Bank 2 Sensor 1
P0059 Oldsmobile — HO2S Heater Resistance Bank 2 Sensor 1
P0059 Pontiac — HO2S Heater Resistance Bank 2 Sensor 1
P0059 Saturn — HO2S Heater Resistance Bank 2 Sensor 1
P0059 Suzuki — HO2S21 Heater Control Circuit Low/High/Heater Resistance

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 Code

What does the OBDII code P0059 mean?

1. P0059 indicates a problem with the heater circuit resistance in the oxygen sensor (HO2S) for Bank 2 Sensor 1, typically caused by a malfunction in the sensorâ€™s heating element or its wiring. 2.

What are the symptoms of code P0059?

Common symptoms include an illuminated check engine light, poor fuel efficiency, rough idling, and in some cases, reduced engine performance. 3.

What causes the P0059 code to appear?

The code can be triggered by a faulty oxygen sensor, damaged wiring or connectors, a blown fuse, or issues with the engine control module (ECM). 4.

How do I diagnose a P0059 code?

Start by inspecting the oxygen sensorâ€™s wiring and connectors for damage or corrosion. Use a multimeter to test the sensor's heater circuit resistance and check for proper voltage supply to the sensor. 5.

Can a bad oxygen sensor trigger the P0059 code?

Yes, a malfunctioning oxygen sensor with a defective heater circuit is a common cause of the P0059 code. 6.

Is it safe to drive with a P0059 code?

While the vehicle may still be drivable, ignoring this code can lead to poor fuel economy and potential damage to the catalytic converter over time. 7.

How do I fix the P0059 code?

Repairs may include replacing the oxygen sensor, repairing or replacing damaged wiring, checking and replacing fuses, or reprogramming the ECM if needed. 8.

How much does it cost to fix a P0059 code?

The cost to fix the P0059 code varies but typically ranges from $150 to $400, depending on whether the oxygen sensor or wiring needs replacement. 9.

Which sensor is affected by the P0059 code?

The code refers to the heater circuit of the oxygen sensor located in Bank 2 (the side of the engine opposite Cylinder 1), upstream of the catalytic converter. 10.

Can a bad ECM cause the P0059 code?

Yes, although rare, a malfunctioning ECM could cause incorrect readings or fail to supply power to the oxygen sensor heater circuit, resulting in the P0059 code.