O2 Sensor Pumping Current Trim Circuit Low Bank 2 Sensor 1
The P2630 code means the vehicle's onboard diagnostic system has detected: O2 Sensor Pumping Current Trim Circuit Low Bank 2 Sensor 1. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- moderate
- Estimated cost
- $150 - $500 (parts and labor)
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What Are the Symptoms of P2630?
- Bank 2 running rich
- Higher fuel consumption
- Black smoke from exhaust
- Bank 2 spark plugs fouling
What Causes P2630? (Most Likely First)
- Bank 2 wideband O2 sensor failure Very High
- Short to ground in bank 2 sensor circuit High
- Exhaust leak on bank 2 before sensor Moderate
- Bank 2 sensor contaminated Low
Can I Still Drive with P2630?
Short distances only. P2630 is rated moderate severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.
Frequently Asked Questions
Why are only bank 2 spark plugs fouling?
The faulty bank 2 O2 sensor causes the ECM to add excess fuel only to bank 2 cylinders, fouling those plugs while bank 1 remains normal.
Can I swap bank 1 and bank 2 sensors to test?
If the sensors are the same part number, swapping them can confirm whether the fault follows the sensor or stays with the wiring.
How do I identify bank 2 on my engine?
Bank 2 is the side of the engine that does not contain cylinder 1. Consult your vehicle service manual for the specific cylinder numbering.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose P2630?
-
Monitor bank 2 O2 pumping current data
-
Check bank 2 sensor wiring for ground shorts
-
Inspect bank 2 exhaust manifold for leaks
-
Compare bank 2 sensor readings to bank 1
Sources 2
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
- Cross-checked against the SAE J2012:2002 DTC table (2026-08-27)archived scan of the SAE standard — readable copy, not SAE’s current edition
Which Vehicles Commonly Get P2630?
- 2010-2020 Toyota Tundra V8
- 2012-2019 Honda Odyssey V6
- 2008-2018 Ford F-150 V8
- 2011-2020 Chevrolet Silverado V8
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