P0037 2003 Infiniti G35 Code - HO2S12 Heater Control Circuit Low
Quick Answer
Oxygen Sensors (O2S) or Heated Oxygen Sensors (HO2S) need to reach a minimum operating temperature of 750 degrees F to produce an accurate voltage signal. Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2, Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 fuse, Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 harness is open or shorted. 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
- P0037 2003 Infiniti G35 indicates HO2S12 Heater Control Circuit Low.
- Common causes
- Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2, Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 fuse, Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 harness is open or shorted.
- 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 P0037 2003 Infiniti G35 Description
In order to achieve the require temperature, a heater element is included inside the heated oxygen sensor. The ECM controls the heated oxygen sensor heater element based on signals from the engine coolant temperature and engine load. The ECM controls the heater element circuit by allowing current flow to ground.
The ECM monitors the voltage signal received through the heater element circuit and determines the state of the circuit by comparing the voltage detected with the factory specifications.
What are the Possible Causes of the DTC P0037 2003 Infiniti G35?
- Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 fuse
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 harness is open or shorted
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0037 2003 Infiniti G35?
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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0037 2003 Infiniti G35 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 P0037 2003 Infiniti G35 Code
1. What are the common symptoms of OBDII code P0037 on a 2003 Infiniti G35?
- Common symptoms include poor fuel economy, rough idling, stalling, and the illumination of the Check Engine Light.
2. What does the OBDII code P0037 HO2S12 Heater Control Circuit Low mean on a 2003 Infiniti G35?
- This code indicates that there is a problem with the oxygen sensor (HO2S12) heater control circuit, specifically that the voltage is lower than normal.
3. What are the possible causes of OBDII code P0037 on a 2003 Infiniti G35?
- Common causes include a faulty oxygen sensor, damaged wiring or connectors in the heater circuit, or a blown fuse related to the sensor.
4. How can I diagnose the issue causing OBDII code P0037 on my 2003 Infiniti G35?
- You can use a multimeter to test the resistance of the oxygen sensor heater circuit, check for damaged wiring or connectors, and inspect the fuse related to the sensor.
5. Can I continue driving my 2003 Infiniti G35 with OBDII code P0037 present?
- It is not recommended to drive with this code present, as it can lead to decreased fuel efficiency and potential damage to the catalytic converter over time.
6. How can I repair OBDII code P0037 on my 2003 Infiniti G35?
- Depending on the root cause, you may need to replace the oxygen sensor, repair damaged wiring or connectors, or replace a blown fuse related to the sensor.
7. Is it possible to reset the Check Engine Light after fixing OBDII code P0037 on a 2003 Infiniti G35?
- Yes, you can reset the Check Engine Light using an OBDII scanner tool after the issue causing the code has been resolved.
8. How much does it typically cost to repair OBDII code P0037 on a 2003 Infiniti G35?
- The cost of repair can vary depending on the specific cause, but it may range from $100 to $300 for parts and labor.
9. Will OBDII code P0037 on a 2003 Infiniti G35 cause the vehicle to fail an emissions test?
- Yes, this code can cause the vehicle to fail an emissions test due to increased emissions and improper oxygen sensor function.
10. How often should I check the oxygen sensors on my 2003 Infiniti G35 to prevent OBDII code P0037 from occurring?
- It is recommended to inspect and potentially replace oxygen sensors every 60,000 to 90,000 miles to prevent issues like OBDII code P0037.
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