P2628 Mercury Code - Oxygen Sensor Positive Current Trim Circuit High Bank 1 Sensor 1
Quick Answer
A resistor is installed in the Universal Heated Oxygen Sensor (HO2S) connector for part to part variance. Common causes include Faulty Heated Oxygen Sensor (HO2S), Heated Oxygen Sensor (HO2S) harness is open or shorted, Heated Oxygen Sensor (HO2S) 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
- P2628 Mercury indicates Oxygen Sensor Positive Current Trim Circuit High Bank 1 Sensor 1.
- Common causes
- Common causes include Faulty Heated Oxygen Sensor (HO2S), Heated Oxygen Sensor (HO2S) harness is open or shorted, Heated Oxygen Sensor (HO2S) 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 P2628 Mercury Description
What are the Possible Causes of the DTC P2628 Mercury?
- Faulty Heated Oxygen Sensor (HO2S)
- Heated Oxygen Sensor (HO2S) harness is open or shorted
- Heated Oxygen Sensor (HO2S) circuit poor electrical connection
How to Fix the DTC P2628 Mercury?
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 P2628 Mercury 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.
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Frequently Asked Questions about P2628 Mercury Code
1. What does the OBDII code P2628 indicate on a Mercury vehicle?
The code P2628 indicates that there is an issue with the oxygen sensor positive current trim circuit, specifically showing a high signal in bank 1 sensor 1. This sensor is involved in adjusting the fuel mixture by monitoring oxygen levels in the exhaust gases.
2. What are the common symptoms of code P2628 in a Mercury?
Symptoms may include a check engine light, poor fuel economy, rough engine idle, and potentially increased exhaust emissions. The vehicle might also experience a lack of power during acceleration.
3. What can cause the P2628 code to appear in a Mercury?
Common causes include faulty oxygen sensors, wiring issues (like shorts to voltage or poor connections), problems with the engine control module, or issues with the fuel delivery system.
4. How can I fix the P2628 code on my Mercury?
To fix this code, start by inspecting the wiring and connectors related to the oxygen sensor for any signs of damage or corrosion. If the wiring is intact, consider replacing the oxygen sensor itself. If the problem persists, further diagnostics may be needed to check the engine control module or the fuel delivery system.
5. Is it safe to drive my Mercury with the P2628 code?
While you can still drive your vehicle, doing so with a malfunctioning oxygen sensor can lead to reduced engine performance, higher fuel consumption, and increased emissions. It’s advisable to address the issue promptly to avoid potential further damage to the engine.
6. How do I diagnose the P2628 code on a Mercury?
Diagnosis should start with a visual inspection of the oxygen sensor and its connections. Use an OBDII scanner to confirm the code and freeze frame data. Testing the sensor's output with a multimeter and checking the ECM for updates or faults might also be necessary.
7. Can a faulty oxygen sensor cause other issues in a Mercury?
Yes, a faulty oxygen sensor can affect the air-fuel ratio, leading to engine misfires, increased emissions, and potentially causing the catalytic converter to fail prematurely due to improper balance of the exhaust gases.
8. What tools are needed to resolve a P2628 code?
You'll likely need an OBDII scan tool, a multimeter for electrical testing, and basic hand tools to access and replace the oxygen sensor. Optionally, a professional-grade scanner might be needed for deeper diagnostics.
9. How much does it cost to fix an oxygen sensor related to the P2628 code in a Mercury?
The cost can vary depending on the model and the labor charges. Typically, replacing an oxygen sensor can cost anywhere from $200 to $400, including parts and labor.
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