P0059 Mercury Code - HO2S Heater Resistance Bank 2 Sensor 1
Quick Answer
The universal HO2S, sometimes referred to as a wideband oxygen sensor, uses the typical HO2S combined with a current controller in the Powertrain Control Module (PCM) to infer an air to fuel ratio relative to the stoichiometric air to fuel ratio. Common causes include Faulty Universal Heated Oxygen Sensor Bank 2 Sensor 1 (HO2S21), Universal Heated Oxygen Sensor Bank 2 Sensor 1 circuit open shorted to ground, Universal 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 Mercury indicates HO2S Heater Resistance Bank 2 Sensor 1.
- Common causes
- Common causes include Faulty Universal Heated Oxygen Sensor Bank 2 Sensor 1 (HO2S21), Universal Heated Oxygen Sensor Bank 2 Sensor 1 circuit open shorted to ground, Universal 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.
Code P0059 Mercury Description
The universal HO2S also uses a self contained reference chamber to make sure an oxygen differential is always present. The oxygen for the reference chamber is supplied by pumping small amounts of oxygen ions from the measurement chamber into the reference chamber. The universal HO2S does not need access to outside air.
Part to part variance is compensated for by placing a resistor in the connector. This resistor trims the current measured by the current controller in the PCM.
The universal HO2S heater is embedded with the sensing element allowing the engine to enter closed loop operation sooner. The heating element heats the sensor to a temperature of 780°C to 830°C (1,436°F to 1,526°F).
This Diagnostic Trouble Code (DTC) sets when the heater current requirements are too low or too high in the Universal Heated Oxygen Sensor Bank 2 Sensor 1 (HO2S21) circuit (if equipped) or HTR21 circuit (if equipped).
What are the Possible Causes of the DTC P0059 Mercury?
- Faulty Universal Heated Oxygen Sensor Bank 2 Sensor 1 (HO2S21)
- Universal Heated Oxygen Sensor Bank 2 Sensor 1 circuit open shorted to ground
- Universal Heated Oxygen Sensor Bank 2 Sensor 1 circuit poor electrical connection
How to Fix the DTC P0059 Mercury?
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 Mercury 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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Frequently Asked Questions about P0059 Mercury Code
1. What are the common symptoms of OBDII code P0059 on a Mercury vehicle?
The common symptoms of code P0059 include poor fuel economy, rough idling, stalling, and the illumination of the Check Engine Light.
2. What does the OBDII code P0059 indicate in a Mercury vehicle?
Code P0059 indicates a malfunction in the heater circuit of the oxygen sensor (Bank 2, Sensor 1) in the exhaust system.
3. What are the possible causes of OBDII code P0059 on a Mercury?
Common causes of code P0059 include a faulty oxygen sensor, damaged wiring or connectors, a blown fuse, or a problem with the engine control module (ECM).
4. How can I diagnose OBDII code P0059 in my Mercury vehicle?
Diagnosing code P0059 involves inspecting the oxygen sensor and its wiring, checking for blown fuses, and using a scan tool to analyze the sensor's data and heater circuit resistance.
5. Can I continue driving my Mercury with OBDII code P0059?
It is not recommended to drive your Mercury with code P0059 present, as it can lead to reduced fuel efficiency, engine performance issues, and potential damage to the catalytic converter.
6. How can I repair OBDII code P0059 on my Mercury?
Repairing code P0059 may involve replacing the faulty oxygen sensor, repairing damaged wiring or connectors, replacing blown fuses, or addressing any ECM issues.
7. Is it possible to reset OBDII code P0059 on a Mercury without fixing the underlying issue?
While you can clear the code with a scan tool, it will likely return if the underlying issue causing the code is not addressed and repaired.
8. How much does it typically cost to fix OBDII code P0059 on a Mercury?
The cost of fixing code P0059 can vary depending on the root cause of the issue, but it may range from $150 to $400 for parts and labor.
9. Can a DIY enthusiast fix OBDII code P0059 on a Mercury?
Depending on your skill level and access to tools, you may be able to address code P0059 yourself by replacing the oxygen sensor or checking and repairing the wiring.
10. How long does it take to repair OBDII code P0059 on a Mercury?
The repair time for code P0059 can vary, but it typically takes 1-2 hours for a professional mechanic to diagnose and fix the issue.
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