P0051 Oldsmobile Code - HO2S Heater Control Circuit Low Voltage Bank 2 Sensor 1
Quick Answer
Heated Oxygen Sensors (HO2S) are used for fuel control and post catalyst monitoring. Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1, Heated Oxygen Sensor Bank 2 Sensor 1 harness is open shorted, Heated Oxygen Sensor Bank 2 Sensor 1 circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- P0051 Oldsmobile indicates HO2S Heater Control Circuit Low Voltage Bank 2 Sensor 1.
- Common causes
- Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1, Heated Oxygen Sensor Bank 2 Sensor 1 harness is open shorted, Heated Oxygen Sensor Bank 2 Sensor 1 circuit poor electrical connection.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
Code P0051 Oldsmobile Description
The Diagnostic Trouble Code (DTC) will be set when the ECM detects a short to ground in the heater output low side driver circuit of the heated oxygen sensor when the heater is commanded OFF for greater than 5 s.
What are the Possible Causes of the DTC P0051 Oldsmobile?
- Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1
- Heated Oxygen Sensor Bank 2 Sensor 1 harness is open shorted
- Heated Oxygen Sensor Bank 2 Sensor 1 circuit poor electrical connection
- Heated Oxygen Sensor Bank 2 Sensor 1 fuse
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0051 Oldsmobile?
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
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0051 Oldsmobile 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 P0051 Oldsmobile code?
Need more information on how to fix the P0051 Oldsmobile code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0051 Oldsmobile code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0051 Oldsmobile Code
1. What are the common symptoms of OBDII code P0051 in an Oldsmobile?
- Common symptoms include poor engine performance, decreased fuel efficiency, rough idling, and the illumination of the "Check Engine" light.
2. What does the OBDII code P0051 indicating "HO2S Heater Control Circuit Low Voltage Bank 2 Sensor 1" mean for an Oldsmobile?
- This code indicates that the oxygen sensor heater circuit in bank 2 sensor 1 is experiencing low voltage, which can affect the sensor's performance.
3. What are the possible causes of OBDII code P0051 in an Oldsmobile?
- Possible causes include a faulty oxygen sensor, damaged wiring or connectors in the heater circuit, a blown fuse, or issues with the engine control module (ECM).
4. How can I diagnose the OBDII code P0051 in my Oldsmobile?
- You can diagnose this code by using an OBDII scanner to retrieve the specific fault code, inspecting the wiring and connectors for damage, checking the fuse related to the oxygen sensor heater circuit, and testing the oxygen sensor itself.
5. Can I continue driving my Oldsmobile with OBDII code P0051 present?
- It is not recommended to drive your vehicle with this code present, as it can lead to decreased fuel efficiency and potential damage to the catalytic converter over time.
6. What is the typical repair for OBDII code P0051 in an Oldsmobile?
- The typical repair involves replacing the oxygen sensor in bank 2 sensor 1, repairing any damaged wiring or connectors in the heater circuit, and ensuring that the fuse is in good condition.
7. How much does it cost to repair OBDII code P0051 in an Oldsmobile?
- The cost of repair can vary depending on the specific issue causing the code, but it typically ranges from $200 to $500, including parts and labor.
8. Can I reset the OBDII code P0051 in my Oldsmobile without fixing the underlying issue?
- While you can clear the code using an OBDII scanner, it is important to address the underlying problem to prevent further issues with your vehicle's performance and emissions.
9. How often does OBDII code P0051 occur in Oldsmobile vehicles?
- OBDII code P0051 can occur sporadically in Oldsmobile vehicles, especially in older models or those with high mileage, due to normal wear and tear on components like the oxygen sensor.
10. Is OBDII code P0051 a serious issue that requires immediate attention in an Oldsmobile?
- While the code may not cause immediate harm to your vehicle, it is still important to address it promptly to prevent further damage and ensure optimal engine performance and emissions control.
Discuss the causes and fixes for P0051 Oldsmobile OBDII Code
Code P0051 Oldsmobile 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.
