OBD2 Car ScannerWhat does P2629 mean?
P2629 stands for O2 Sensor Pumping Current Trim Circuit/Open Bank 2 Sensor 1. The engine computer has found a fault in one of its own circuits or in a circuit it controls.
Powertrain codes cover the engine, transmission and emissions. When the car's computer sees a reading outside its normal range, it stores this code and may turn on a warning light on the dashboard.
Common causes
- Damaged wiring or a loose connector
- Low battery voltage or poor ground
- Faulty relay or actuator
- In rare cases, a faulty engine control module
What to do
- Read all stored and pending codes with a scanner. Several codes together often point to one cause.
- Note the freeze frame data (speed, temperature, load) recorded when the code was set.
- Inspect the wiring and connectors of the part named in the code for damage, corrosion or looseness.
- Fix the most likely and cheapest cause first, then clear the code and drive to see if it comes back.
Read this code from your own car
Plug in a cheap ELM327 adapter and the app shows every fault code, what it means and how to fix it.
Frequently asked questions
What does P2629 mean?
P2629 means “O2 Sensor Pumping Current Trim Circuit/Open Bank 2 Sensor 1”. It belongs to the computer and output circuits group: The engine computer has found a fault in one of its own circuits or in a circuit it controls.
Is it safe to drive with P2629?
You can usually drive carefully for a short time, but fix it soon to avoid further damage or higher fuel use.
How do I clear P2629?
Fix the cause, then clear the code with an OBD2 scanner or app. If the fault is still there, the code will come back.
Related codes
- P261DCoolant Pump B Control Circuit High
- P2626O2 Sensor Pumping Current Trim Circuit/Open Bank 1 Sensor 1
- P2627O2 Sensor Pumping Current Trim Circuit Low Bank 1 Sensor 1
- P2628O2 Sensor Pumping Current Trim Circuit High Bank 1 Sensor 1
- P2630O2 Sensor Pumping Current Trim Circuit Low Bank 2 Sensor 1
- P2631O2 Sensor Pumping Current Trim Circuit High Bank 2 Sensor 1
- P2632Fuel Pump B Control Circuit /Open
- P2633Fuel Pump B Control Circuit Low
Code meanings can vary by manufacturer. This page is general guidance, not a repair manual. Always confirm the cause before replacing parts.