P2629 Mercury Code - Oxygen Sensor Positive Current Trim Circuit/Open Bank 2 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
- P2629 Mercury indicates Oxygen Sensor Positive Current Trim Circuit/Open Bank 2 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 P2629 Mercury Description
What are the Possible Causes of the DTC P2629 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 P2629 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 P2629 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 P2629 Mercury Code
What does the OBD-II code P2629 mean for a Mercury vehicle?
The P2629 code indicates an issue with the Oxygen Sensor Positive Current Trim Circuit, specifically an open circuit for Bank 2 Sensor 1.
What are the common symptoms of code P2629?
Symptoms may include poor fuel efficiency, rough idling, engine hesitation, and the check engine light turning on.
What causes the P2629 code to appear in a Mercury vehicle?
Common causes include a faulty oxygen sensor, damaged wiring or connectors in the sensor circuit, or issues with the powertrain control module (PCM).
How can I diagnose the P2629 code?
Start by inspecting the wiring and connectors for damage or corrosion, then test the oxygen sensor itself to ensure it's functioning properly.
Can driving with code P2629 damage my Mercury vehicle?
Yes, ignoring this code can lead to long-term engine performance issues, reduced fuel economy, and potential damage to the catalytic converter.
Is Bank 2 Sensor 1 the upstream or downstream oxygen sensor?
Bank 2 Sensor 1 is the upstream oxygen sensor, located before the catalytic converter.
How do I fix the P2629 code in a Mercury vehicle?
Repairs may include replacing the oxygen sensor, repairing or replacing damaged wiring, or reprogramming the PCM if necessary.
How much does it typically cost to fix code P2629?
The repair cost can range from $150 to $400, depending on whether the sensor or wiring needs replacement and labor rates.
Can a dirty oxygen sensor cause the P2629 code?
A dirty or contaminated sensor can cause improper readings, but the code typically points to an open circuit rather than contamination.
Do I need to clear the P2629 code after repairs?
Yes, after making repairs, you should clear the code using an OBD-II scanner and test drive the vehicle to ensure the issue is resolved.
Discuss the causes and fixes for P2629 Mercury OBDII Code
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