P0038 2004 Infiniti G35 Code - HO2S12 Heater Control Circuit High
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
- P0038 2004 Infiniti G35 indicates HO2S12 Heater Control Circuit High.
- 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 P0038 2004 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 P0038 2004 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 P0038 2004 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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0038 2004 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 P0038 2004 Infiniti G35 Code
1. What are the common symptoms of OBDII code P0038 on a 2004 Infiniti G35?
- Common symptoms include the Check Engine Light turning on, decreased fuel efficiency, rough idling, and potential stalling.
2. What does the OBDII code P0038 for a 2004 Infiniti G35 indicate?
- The code P0038 indicates an issue with the HO2S12 (Heated Oxygen Sensor Bank 1 Sensor 2) heater control circuit being detected as too high.
3. What are the possible causes of OBDII code P0038 in a 2004 Infiniti G35?
- Possible causes include a faulty HO2S12 sensor, damaged wiring or connectors in the sensor circuit, a blown fuse, or issues with the ECM (Engine Control Module).
4. How can I diagnose the OBDII code P0038 on my 2004 Infiniti G35?
- Diagnosing involves checking the HO2S12 sensor for proper operation, inspecting wiring and connectors for damage, testing fuses related to the sensor, and scanning the ECM for any related faults.
5. Can I continue driving my 2004 Infiniti G35 with OBDII code P0038 active?
- It is generally not recommended to continue driving with an active P0038 code, as it can lead to further damage to the engine or emissions system over time.
6. How can I repair OBDII code P0038 on a 2004 Infiniti G35?
- Repairing the code typically involves replacing the faulty HO2S12 sensor, repairing or replacing damaged wiring or connectors, and ensuring proper fuse function.
7. What are some tips to prevent OBDII code P0038 from reoccurring in a 2004 Infiniti G35?
- Regularly inspect and maintain the oxygen sensors, wiring, and connectors, follow recommended maintenance schedules, and address any engine performance issues promptly.
8. How much does it cost to fix OBDII code P0038 on a 2004 Infiniti G35?
- The cost can vary depending on the exact cause of the issue, but generally, replacing the HO2S12 sensor can range from $100 to $200, while addressing wiring or ECM issues may incur additional costs.
9. Can a DIY enthusiast repair OBDII code P0038 on a 2004 Infiniti G35?
- While some aspects of diagnosing and repairing P0038 may be within reach of a skilled DIY enthusiast, it is recommended to seek professional help for accurate diagnosis and proper repair to avoid potential complications.
10. Will resetting the OBDII system clear the P0038 code on a 2004 Infiniti G35?
- Resetting the system may temporarily clear the code, but if the underlying issue causing the P0038 code is not addressed, it is likely to reappear once the ECM detects the fault again.
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