P1147 2004 Nissan Sentra Code - Heated Oxygen Sensor 2 Maximum Voltage Monitoring Bank
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 Nissan Sentra indicates Heated Oxygen Sensor 2 Maximum Voltage Monitoring Bank.
- 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 Nissan Sentra Description
What are the Possible Causes of the DTC P1147 2004 Nissan Sentra?
- 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 Nissan Sentra?
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 Nissan Sentra 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.
Need more information about the P1147 2004 Nissan Sentra code?
Need more information on how to fix the P1147 2004 Nissan Sentra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1147 2004 Nissan Sentra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1147 2004 Nissan Sentra Code
1. What are the common symptoms of OBDII code P1147 in a 2004 Nissan Sentra?
- Common symptoms include reduced fuel efficiency, rough idling, and potential stalling of the engine.
2. What does the OBDII code P1147 indicating "Heated Oxygen Sensor 2 Maximum Voltage Monitoring Bank" mean for a 2004 Nissan Sentra?
- This code indicates that the Engine Control Module (ECM) has detected a high voltage condition in the second oxygen sensor in the exhaust system.
3. What are the possible causes of OBDII code P1147 in a 2004 Nissan Sentra?
- Possible causes include a faulty oxygen sensor, wiring issues, exhaust leaks, or a malfunctioning ECM.
4. How can I diagnose the OBDII code P1147 in my 2004 Nissan Sentra?
- Diagnose by visually inspecting the oxygen sensor and its wiring, checking for exhaust leaks, and using a scan tool to monitor sensor data.
5. Can I continue driving my 2004 Nissan Sentra with OBDII code P1147?
- It is not recommended to continue driving with this code, as it can lead to decreased fuel efficiency and potential engine performance issues.
6. How can I repair OBDII code P1147 in my 2004 Nissan Sentra?
- Repair may involve replacing the heated oxygen sensor, repairing any damaged wiring, fixing exhaust leaks, or reprogramming the ECM.
7. Is it possible to reset the OBDII code P1147 without fixing the underlying issue in a 2004 Nissan Sentra?
- While you can clear the code with a scan tool, it will likely return until the root cause is addressed.
8. Can a DIY enthusiast fix OBDII code P1147 in a 2004 Nissan Sentra?
- Depending on your skill level, you may be able to replace the oxygen sensor or repair wiring, but more complex issues may require professional assistance.
9. How much does it typically cost to repair OBDII code P1147 in a 2004 Nissan Sentra?
- Costs can vary depending on the exact cause, but expect to pay for the replacement sensor, any necessary parts, and labor fees if taking it to a mechanic.
10. How often does OBDII code P1147 occur in a 2004 Nissan Sentra, and is it a common issue?
- While not as common as some other codes, P1147 can occur due to sensor wear, wiring degradation, or other factors, especially in older vehicles.
Discuss the causes and fixes for P1147 2004 Nissan Sentra OBDII Code
-
This car has been parked for some time. It had old gasoline in it because after driving it for a day, I noticed when I started my car the next day a lot of white thick smoke was coming from the exhaust. After the car warmed up it stopped smoking and hasn't done it since. A couple of days later I noticed the car was hesitating to start. I would have to try it a few times before it would actually stay running. (Seems like its not getting gas or something) Because it was parked for so long I waited until I used up the half tank of gas in it, I refilled with mid-grade (87) and poured in a bottle of HEET that had fuel injector cleaner in it. I also had the oil changed and checked all the fluids as well. The car still hesitates to start. There were no warning lights on until a couple of days laters the service engine soon light appeared and after having the codes checked it said P1147 HO 2S Rich shift monitoring. The car is wasting more gas than it should be for a four cylinder. So this is where I am at right now not sure what to do next. Any Suggestions? Please and thank you.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
