P1147 2004 Infiniti G35 Code - Heated Oxygen Sensor 2 Maximum Voltage Monitoring Bank 1
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 heated oxygen (O2) sensor 2 (rear), Intake air leaks, Heated oxygen (O2) sensor 2 (rear) harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1147 2004 Infiniti G35 indicates Heated Oxygen Sensor 2 Maximum Voltage Monitoring Bank 1.
- Common causes
- Common causes include Faulty heated oxygen (O2) sensor 2 (rear), Intake air leaks, Heated oxygen (O2) sensor 2 (rear) harness is open or shorted.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P1147 2004 Infiniti G35 Description
What are the Possible Causes of the DTC P1147 2004 Infiniti G35?
- Faulty heated oxygen (O2) sensor 2 (rear)
- Intake air leaks
- Heated oxygen (O2) sensor 2 (rear) harness is open or shorted
- Heated oxygen (O2) sensor 2 (rear) circuit poor electrical connection
- Inappropriate fuel pressure
- Faulty fuel injectors
How to Fix the DTC P1147 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 P1147 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 P1147 2004 Infiniti G35 Code
1. What does OBDII code P1147 mean for a 2004 Infiniti G35?
P1147 indicates that the heated oxygen sensor 2 (HO2S2) on Bank 1 has exceeded its maximum voltage threshold, suggesting a potential issue with the sensor or related systems.
2. What are the symptoms of code P1147 in a 2004 Infiniti G35?
Common symptoms include poor fuel economy, rough idling, reduced engine performance, and the check engine light being illuminated.
3. What causes code P1147 to appear on a 2004 Infiniti G35?
Possible causes include a faulty Bank 1, Sensor 2 oxygen sensor, damaged wiring or connectors, exhaust leaks, or a malfunctioning engine control module (ECM).
4. Can I drive my 2004 Infiniti G35 with code P1147?
While the car may still drive, it's not recommended to ignore the issue because it can lead to poor performance, higher emissions, and potential damage to other components.
5. How do I diagnose code P1147 on a 2004 Infiniti G35?
Diagnosis involves checking the oxygen sensor wiring and connectors for damage, testing the sensor's voltage output with a multimeter, and inspecting for exhaust leaks.
6. How do I fix code P1147 on my 2004 Infiniti G35?
Repairs may include replacing the Bank 1, Sensor 2 oxygen sensor, fixing damaged wiring, sealing exhaust leaks, or reprogramming or replacing the ECM if necessary.
7. How much does it cost to fix code P1147 on a 2004 Infiniti G35?
The cost varies depending on the repair, but replacing an oxygen sensor typically ranges from $150 to $300, including parts and labor.
8. Is code P1147 related to emissions issues?
Yes, a faulty oxygen sensor can cause improper air-fuel mixture readings, leading to increased emissions and potentially failing an emissions test.
9. What is the role of Bank 1, Sensor 2 on a 2004 Infiniti G35?
Bank 1, Sensor 2 is the downstream oxygen sensor that monitors the efficiency of the catalytic converter and helps maintain proper emissions.
10. Can a dirty air filter cause code P1147 on a 2004 Infiniti G35?
While unlikely, a severely restricted air filter can affect engine performance and may indirectly contribute to sensor issues. Regular maintenance is essential to avoid related problems.
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