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Engine-Codes – Generic – P2629

P2629 Code - Oxygen Sensor Pumping Current Trim Circuit/Open Bank 2 Sensor 1

Quick Answer

The P2629 diagnostic trouble code (DTC) indicates an issue with the oxygen sensor pumping current trim circuit or an open circuit in Bank 2 Sensor 1. Common causes include Faulty oxygen sensor, Wiring issues in the sensor circuit, ECM software malfunction. 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 indicates Oxygen Sensor Pumping Current Trim Circuit/Open Bank 2 Sensor 1.
Common causes
Common causes include Faulty oxygen sensor, Wiring issues in the sensor circuit, ECM software malfunction.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code P2629 Description

The P2629 diagnostic trouble code (DTC) indicates an issue with the oxygen sensor pumping current trim circuit or an open circuit in Bank 2 Sensor 1. This sensor is responsible for monitoring the oxygen levels in the exhaust gases and providing feedback to the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion. When this sensor malfunctions, it can lead to a variety of performance issues and potentially cause long-term damage to the vehicle's systems.

OBDII Code P2629 - Oxygen Sensor Pumping Current Trim Circuit/Open Bank 2 Sensor 1
P2629 Code - Oxygen Sensor Pumping Current Trim Circuit/Open Bank 2 Sensor 1

Common Causes of P2629

  1. Faulty oxygen sensor
  2. Wiring issues in the sensor circuit
  3. ECM software malfunction
  4. Exhaust leaks near the sensor
  5. Contaminated sensor due to oil or coolant leaks

Symptoms of P2629

  1. Decreased fuel efficiency
  2. Engine misfires
  3. Rough idling
  4. Increased emissions
  5. Check engine light illuminated

How to Fix P2629

  1. Use an OBD-II scanner to confirm the P2629 code and pinpoint the exact issue.
  2. Inspect the wiring harness and connectors for any damage or corrosion. Repair or replace as needed.
  3. Test the oxygen sensor using a multimeter to check for proper functionality. Replace if necessary.
  4. Clear the DTC and reset the ECM to see if the code returns after repairs.
  5. Perform a road test to ensure the issue has been resolved and the vehicle is running smoothly.

Cost to Fix P2629

** The typical repair costs for addressing the P2629 code can range from $200 to $500, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary, with hourly rates typically falling between $80 and $150. Rates may be higher at dealerships or in metropolitan areas, while independent shops may offer more competitive prices. For a more accurate estimate, it's recommended to inquire with local auto repair shops.

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Code P2629 Information for Specific Makes

  • P2629 Acura — Air/Fuel Ratio Sensor Bank 2 Sensor 1 Circuit Open
  • P2629 BMW — Upstream Oxygen Sensor Open Circuit Monitoring Trim Current Failure Bank 2
  • P2629 Dodge — Oxygen Sensor Positive Current Trim Circuit/Open Bank 2 Sensor 1
  • P2629 Ford — Oxygen Sensor Positive Current Trim Circuit/Open Bank 2 Sensor 1
  • P2629 Honda — Air/Fuel Ratio Sensor Bank 2 Sensor 1 Circuit Open
  • P2629 Lincoln — Oxygen Sensor Positive Current Trim Circuit/Open Bank 2 Sensor 1
  • P2629 Mercury — Oxygen Sensor Positive Current Trim Circuit/Open Bank 2 Sensor 1
  • P2629 MINI — Upstream Oxygen Sensor Open Circuit Monitoring Trim Current Failure Bank 2
About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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