P0138 2004 Infiniti G35 Code - HO2S12 Circuit High Voltage
Quick Answer
The Heated Oxygen Sensor 2 (HO2S) (Rear O2 Sensor), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. Common causes include Faulty Rear Heated Oxygen Sensor Bank 1, Rear Heated Oxygen Sensor Bank 1 harness is open or shorted, Rear Heated Oxygen Sensor Bank 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
- P0138 2004 Infiniti G35 indicates HO2S12 Circuit High Voltage.
- Common causes
- Common causes include Faulty Rear Heated Oxygen Sensor Bank 1, Rear Heated Oxygen Sensor Bank 1 harness is open or shorted, Rear Heated Oxygen Sensor Bank 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 P0138 2004 Infiniti G35 Description
What are the Possible Causes of the DTC P0138 2004 Infiniti G35?
- Faulty Rear Heated Oxygen Sensor Bank 1
- Rear Heated Oxygen Sensor Bank 1 harness is open or shorted
- Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection
- Intake air leaks
- Exhaust gas leaks
- Inappropriate fuel pressure
- Faulty fuel injectors
How to Fix the DTC P0138 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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0138 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 P0138 2004 Infiniti G35 Code
1. What does OBDII code P0138 for a 2004 Infiniti G35 mean?
- OBDII code P0138 in a 2004 Infiniti G35 indicates a high voltage condition in the HO2S12 oxygen sensor circuit.
2. What are the common symptoms of OBDII code P0138 in a 2004 Infiniti G35?
- Common symptoms of P0138 in a 2004 Infiniti G35 include poor fuel efficiency, rough idling, and potential engine misfires.
3. What are the possible causes of OBDII code P0138 in a 2004 Infiniti G35?
- Possible causes of P0138 in a 2004 Infiniti G35 include a faulty oxygen sensor, wiring issues in the sensor circuit, or a problem with the engine control module.
4. How can I diagnose the HO2S12 circuit high voltage issue in my 2004 Infiniti G35?
- Diagnosing the P0138 code in a 2004 Infiniti G35 involves testing the oxygen sensor, inspecting the wiring for damage, and checking the engine control module for faults.
5. Can a dirty air filter trigger OBDII code P0138 in a 2004 Infiniti G35?
- While a dirty air filter may impact engine performance, it is not a direct cause of the HO2S12 circuit high voltage issue indicated by code P0138.
6. How serious is OBDII code P0138 in a 2004 Infiniti G35?
- OBDII code P0138 should be addressed promptly as it can lead to decreased fuel efficiency and potential damage to the catalytic converter over time.
7. Can I continue driving my 2004 Infiniti G35 with OBDII code P0138?
- It is not recommended to continue driving your 2004 Infiniti G35 with OBDII code P0138 as it can affect engine performance and emissions.
8. What are the repair options for resolving OBDII code P0138 in a 2004 Infiniti G35?
- Repair options for P0138 in a 2004 Infiniti G35 include replacing the oxygen sensor, repairing damaged wiring, or addressing any issues with the engine control module.
9. How much does it typically cost to fix OBDII code P0138 in a 2004 Infiniti G35?
- The cost of fixing P0138 in a 2004 Infiniti G35 can vary depending on the specific issue, but it may range from $100 to $500 for parts and labor.
10. Can I reset the OBDII code P0138 in my 2004 Infiniti G35 myself?
- While you can reset the code using an OBDII scanner, it is important to address the underlying issue causing P0138 to prevent it from recurring.
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