P1051 2004 Infiniti G35 Code - Air Fuel Ratio Sensor 1 Heater Control Circuit Low Bank 2
Quick Answer
The Engine Control Module (ECM) performs ON/OFF duty control of the Air Fuel Ratio (A/F) sensor 1 heater corresponding to the engine operating condition to keep the temperature of A/F sensor 1 element at the specified range. Common causes include Faulty Air Fuel Ratio Sensor 1 Bank 2, Air Fuel Ratio Sensor 1 Bank 2 harness is open or shorted, Air Fuel Ratio Sensor 1 Bank 2 circuit poor electrical connection. 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
- P1051 2004 Infiniti G35 indicates Air Fuel Ratio Sensor 1 Heater Control Circuit Low Bank 2.
- Common causes
- Common causes include Faulty Air Fuel Ratio Sensor 1 Bank 2, Air Fuel Ratio Sensor 1 Bank 2 harness is open or shorted, Air Fuel Ratio Sensor 1 Bank 2 circuit poor electrical connection.
- 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 P1051 2004 Infiniti G35 Description
What are the Possible Causes of the DTC P1051 2004 Infiniti G35?
- Faulty Air Fuel Ratio Sensor 1 Bank 2
- Air Fuel Ratio Sensor 1 Bank 2 harness is open or shorted
- Air Fuel Ratio Sensor 1 Bank 2 circuit poor electrical connection
How to Fix the DTC P1051 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
2004 Infiniti G35 Factory Service Bulletin OBDII Code P1051
The bulletin suggests reprogramming the Engine Control Module (ECM) first before replacing any parts.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1051 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.
Need more information about the P1051 2004 Infiniti G35 code?
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Need Help with the Code?
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Frequently Asked Questions about P1051 2004 Infiniti G35 Code
What does OBDII code P1051 mean for a 2004 Infiniti G35?
P1051 indicates an issue with the Air Fuel Ratio Sensor 1 Heater Control Circuit Low on Bank 2, meaning the heater circuit in the sensor is not functioning properly.
What are the symptoms of code P1051 in a 2004 Infiniti G35?
Symptoms may include an illuminated check engine light, reduced fuel efficiency, rough idling, or poor engine performance.
What causes the P1051 code to appear?
Common causes include a faulty air-fuel ratio sensor, damaged wiring or connectors in the heater control circuit, or problems with the ECM (engine control module).
Can I drive with the P1051 code active?
While the vehicle may still be drivable, it is not recommended to ignore this code as it can lead to poor fuel economy and potential long-term damage to the engine or catalytic converter.
How do I diagnose the P1051 code?
Start by inspecting the wiring and connectors for damage or corrosion. Use a multimeter to test the heater circuit in the air-fuel ratio sensor and verify the ECM’s output.
Is it necessary to replace the air-fuel ratio sensor to fix P1051?
Not always. The issue could be with the wiring, connectors, or ECM. Only replace the sensor if diagnostic tests confirm it is faulty.
What is the difference between Bank 1 and Bank 2?
Bank 1 refers to the side of the engine with cylinder 1, while Bank 2 is the opposite side. In a 2004 Infiniti G35, Bank 2 is typically the driver's side.
How much does it cost to repair a P1051 code?
Repair costs can vary but may include $200-$400 for a new air-fuel ratio sensor, plus diagnostic and labor fees if done by a professional.
Can a dirty air filter cause the P1051 code?
A dirty air filter is unlikely to directly cause P1051, but it can contribute to poor air-fuel ratios, which may exacerbate related issues.
How can I prevent the P1051 code from recurring?
Regular maintenance, including inspecting wiring and connectors and replacing sensors as needed, can help prevent this code from reappearing.
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