P1146 2003 Infiniti G35 Code - Heated Oxygen Sensor 2 Minimum 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
- P1146 2003 Infiniti G35 indicates Heated Oxygen Sensor 2 Minimum 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 P1146 2003 Infiniti G35 Description
What are the Possible Causes of the DTC P1146 2003 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 P1146 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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1146 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.
Need more information about the P1146 2003 Infiniti G35 code?
Need more information on how to fix the P1146 2003 Infiniti G35 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1146 2003 Infiniti G35 code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1146 2003 Infiniti G35 Code
1. What are the common symptoms of OBDII code P1146 in a 2003 Infiniti G35?
The common symptoms of code P1146 include poor engine performance, decreased fuel efficiency, and the illumination of the Check Engine Light.
2. What does OBDII code P1146 "Heated Oxygen Sensor 2 Minimum Voltage Monitoring Bank 1" mean for a 2003 Infiniti G35?
This code indicates that the heated oxygen sensor 2 in bank 1 is detecting a voltage below the expected minimum level, potentially signaling an issue with the sensor or the engine's air-fuel mixture.
3. What are the possible causes of OBDII code P1146 in a 2003 Infiniti G35?
Possible causes of code P1146 include a faulty heated oxygen sensor 2, wiring issues in the oxygen sensor circuit, a vacuum leak, exhaust system leaks, or a problem with the engine's air-fuel ratio.
4. How can I diagnose the cause of OBDII code P1146 in my 2003 Infiniti G35?
Diagnosing code P1146 typically involves using a scan tool to monitor the oxygen sensor's voltage readings, checking the sensor's wiring for damage, inspecting the exhaust system for leaks, and performing a vacuum leak test.
5. Can I drive my 2003 Infiniti G35 with OBDII code P1146?
It is not recommended to drive your vehicle with code P1146 present, as it can lead to reduced engine performance and fuel efficiency. It is best to address the underlying issue promptly.
6. How can I repair OBDII code P1146 in my 2003 Infiniti G35?
Repairing code P1146 may involve replacing the heated oxygen sensor 2 in bank 1, repairing any damaged wiring in the sensor circuit, fixing vacuum leaks, addressing exhaust system leaks, or correcting issues with the air-fuel mixture.
7. Will resetting the OBDII system clear code P1146 from my 2003 Infiniti G35?
Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing P1146 is not addressed, the code is likely to return after some driving cycles.
8. How much does it cost to fix OBDII code P1146 in a 2003 Infiniti G35?
The cost to fix code P1146 can vary depending on the root cause of the issue. Expenses may include the cost of a new heated oxygen sensor, labor costs for diagnostics and repairs, and any additional parts or services needed.
9. Can a DIY enthusiast replace the heated oxygen sensor to fix OBDII code P1146 in a 2003 Infiniti G35?
Replacing the heated oxygen sensor can be a DIY-friendly repair for those with some mechanical experience and the necessary tools. However, proper diagnostic steps should be taken to ensure the sensor is the root cause of code P1146.
10. How often should the oxygen sensors be inspected in a 2003 Infiniti G35 to prevent OBDII code P1146?
It is advisable to inspect the oxygen sensors during routine maintenance or whenever symptoms of poor engine performance or decreased fuel efficiency arise. Regular inspection can help catch potential issues before they trigger code P1146.
Discuss the causes and fixes for P1146 2003 Infiniti G35 OBDII Code
Code P1146 2003 Infiniti G35 comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
