P1051 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 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 Description
What are the Possible Causes of the DTC P1051?
- 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?
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 P1051 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 code?
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Need Help with the Code?
Get the P1051 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- P1051 Buick — Reductant Heater 1 Driver High Temperature
- P1051 Cadillac — Reductant Heater 1 Driver High Temperature
- P1051 Chevrolet — Reductant Heater 1 Driver High Temperature
- P1051 Dodge — Reductant Heater 1 Driver High Temperature
- P1051 Ford — Brake Switch Signal Missing or Improper
- P1051 GMC — Reductant Heater 1 Driver High Temperature
- P1051 Infiniti — Air Fuel Ratio Sensor 1 Heater Control Circuit Low Bank 2
- P1051 Nissan — Air Fuel Ratio Sensor 1 Heater Control Circuit Low Bank 2
Frequently Asked Questions about P1051 Code
1. What are the common symptoms of OBDII code P1051 (Air Fuel Ratio Sensor 1 Heater Control Circuit Low Bank 2)?
- Common symptoms include poor fuel economy, rough idling, engine misfires, and the illumination of the Check Engine Light.
2. What are the possible causes of OBDII code P1051?
- Possible causes include a faulty air fuel ratio sensor, damaged wiring or connectors, a blown fuse, or a malfunctioning heater control circuit.
3. How can I diagnose the issue causing OBDII code P1051?
- Diagnose the issue by checking the air fuel ratio sensor for proper operation, inspecting the wiring and connectors for damage, testing the heater control circuit, and verifying fuse integrity.
4. Can I continue driving my vehicle with OBDII code P1051 present?
- It is not recommended to continue driving with this code as it can lead to decreased fuel efficiency and potential engine performance issues.
5. How do I repair OBDII code P1051?
- Repair options include replacing the air fuel ratio sensor, repairing or replacing damaged wiring or connectors, checking and replacing any blown fuses, or repairing the heater control circuit.
6. Should I reset the Check Engine Light after addressing OBDII code P1051?
- Yes, it is recommended to reset the Check Engine Light using an OBDII scanner after addressing the underlying cause of the P1051 code.
7. Are there any preventative maintenance tips to avoid OBDII code P1051 in the future?
- Regularly inspecting and servicing the air fuel ratio sensor, checking wiring and connectors for any signs of wear, and ensuring proper electrical system maintenance can help prevent this code from reoccurring.
8. Can extreme weather conditions affect OBDII code P1051?
- Yes, extreme cold or hot weather conditions can potentially impact the performance of the air fuel ratio sensor and its heater control circuit, leading to the occurrence of this code.
9. How long does it typically take to repair OBDII code P1051?
- The repair time can vary depending on the exact cause of the code, but it may take anywhere from 1 to 3 hours to diagnose and address the issue adequately.
10. Can a DIY enthusiast repair OBDII code P1051, or is professional assistance recommended?
- While some experienced DIY enthusiasts may be able to address this code themselves, professional assistance is recommended for those unfamiliar with automotive electrical systems and sensor diagnostics.
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