AutoCodes – Generic – P2626

P2626 Code - Oxygen Sensor Pumping Current Trim Circuit/Open Bank 1 Sensor 1

Quick Answer

This fault code is stored in the engine control module when a fault is detected with the oxygen sensor current flow circuit. Common causes include Faulty Heated Exhaust Gas Oxygen Sensor Bank 1 Sensor 1, Heated Exhaust Gas Oxygen Sensor Bank 1 Sensor 1 harness is open or shorted, Heated Exhaust Gas Oxygen Sensor Bank 1 Sensor 1 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: P2626 indicates Oxygen Sensor Pumping Current Trim Circuit/Open Bank 1 Sensor 1.
Common causes: Common causes include Faulty Heated Exhaust Gas Oxygen Sensor Bank 1 Sensor 1, Heated Exhaust Gas Oxygen Sensor Bank 1 Sensor 1 harness is open or shorted, Heated Exhaust Gas Oxygen Sensor Bank 1 Sensor 1 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.

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Code Popularity 36,801

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jan 16, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2626 Description

This fault code is stored in the engine control module when a fault is detected with the oxygen sensor current flow circuit. A wideband oxygen sensor is used to measure the actual air to fuel ratio, this is necessary for modern lean burn spark ignition engines and compression ignition engines. A wideband sensor incorporates two sensors integrated into one component. The first part of the sensor is a narrowband cell that samples the exhaust gas (in a measurement chamber) and the outside atmospheric air. The control module maintains a voltage of 450 millivolts from the narrowband sensor, this equates to a lambda value of one. This is referred to as the reference voltage. In order to maintain this value of lambda one, the second part of the sensor is used, it is a pump cell. This is a chemical pump, and if the sampled exhaust gas is comparatively rich the pump cell is supplied with a negative current to "pump" oxygen into the measurement chamber. Conversely, if the sampled exhaust gas is lean the pump cell is supplied with a positive current to "pump" oxygen out of the measurement chamber. The polarity and magnitude of the current flow is a direct indication of the air to fuel ratio.

OBDII Code P2626 - Oxygen Sensor Pumping Current Trim Circuit/Open Bank 1 Sensor 1 - AutoCodes.com — P2626 Code - Oxygen Sensor Pumping Current Trim Circuit/Open Bank 1 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P2626?

Faulty Heated Exhaust Gas Oxygen Sensor Bank 1 Sensor 1
Heated Exhaust Gas Oxygen Sensor Bank 1 Sensor 1 harness is open or shorted
Heated Exhaust Gas Oxygen Sensor Bank 1 Sensor 1 circuit poor electrical connection

How to Fix the DTC P2626?

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 P2626 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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Get the P2626 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P2626 Acura — Air/Fuel Ratio Sensor Bank 1 Sensor 1 Circuit Open
P2626 BMW — Upstream Oxygen Sensor Open Circuit Monitoring Trim Current Failure Bank 1
P2626 Dodge — Oxygen Sensor Pumping Current Trim Circuit/Open Bank 1 Sensor 1
P2626 Ford — Oxygen Sensor Pumping Current Trim Circuit/Open Bank 1 Sensor 1
P2626 Honda — Air/Fuel Ratio Sensor Bank 1 Sensor 1 Circuit Open
P2626 Hyundai — HO2S Pumping Current Trim Circuit/Open Bank 1 Sensor 1
P2626 KIA — HO2S Pumping Current Trim Circuit/Open Bank 1 Sensor 1
P2626 Lincoln — Oxygen Sensor Pumping Current Trim Circuit/Open Bank 1 Sensor 1
P2626 Mercedes-Benz — O2 Sensor Pumping Current Trim Circuit/Open Bank 1 Sensor 1
P2626 Mercury — Oxygen Sensor Pumping Current Trim Circuit/Open Bank 1 Sensor 1
P2626 MINI — Upstream Oxygen Sensor Open Circuit Monitoring Trim Current Failure Bank 1

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.

Frequently Asked Questions about P2626 Code

1. What are common symptoms of OBDII code P2626?

- Common symptoms include poor fuel economy, rough idling, loss of power, and an illuminated check engine light.

2. What does the OBDII code P2626 indicate?

- The code indicates a fault in the Oxygen Sensor Pumping Current Trim Circuit/Open for Bank 1 Sensor 1.

3. What are possible causes of OBDII code P2626?

- Possible causes include a faulty oxygen sensor, damaged wiring or connectors, exhaust leaks, or issues with the engine control module.

4. How can I diagnose the cause of OBDII code P2626?

- Diagnosis involves inspecting the oxygen sensor and its wiring for damage, checking for exhaust leaks, and using a diagnostic scanner to read live data from the sensor.

5. Can I continue driving with OBDII code P2626?

- It is generally not recommended to continue driving with this code as it can lead to reduced fuel efficiency and potential damage to the catalytic converter.

6. How can I repair OBDII code P2626?

- Repair options include replacing the oxygen sensor, repairing damaged wiring or connectors, fixing exhaust leaks, or resetting the engine control module.

7. Will OBDII code P2626 cause harm to the engine?

- While the code itself may not cause immediate harm, ignoring the underlying issue can lead to decreased engine performance and potential long-term damage.

8. Can a DIY enthusiast fix OBDII code P2626?

- Depending on the cause, DIY enthusiasts with the necessary tools and knowledge may be able to address the issue, such as replacing the oxygen sensor or repairing wiring.

9. How much does it typically cost to repair OBDII code P2626?

- The cost can vary depending on the cause and the repair needed, but replacing an oxygen sensor or repairing wiring may range from $100 to $300 or more.

10. How often does OBDII code P2626 occur in vehicles?

- OBDII code P2626 is relatively common in vehicles with oxygen sensor issues, particularly in older vehicles or those with high mileage.