P2630O2 Sensor Pumping Current Trim Circuit Low (Bank 2 Sensor 1)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2630 reports a trim input that is too low at the upstream wide-band probe of bank 2, the cylinder bank without cylinder 1. Ford's petrol summaries of 2020-23 set it only with NTK probes, where the sensor interface chip sees the resistor line open or grounded; the same chip check runs for about 10 s before a fault is stored. GM documented the L66 3.5 L V6, a Honda design, in 2005: the bank 2 label resistor must not stay above 4.7 V for 5 s while the probe heater is active, and that table also files this under the low code. No service bulletin naming P2630 was found. Since only one bank is affected, the other bank keeps normal closed-loop control. The open fault on this probe is P2629, the high fault P2631, bank 1 low P2627.
- What you may notice
- Check engine light
- Bank 2 running in open loop
- Fuel economy slightly worse
- Likely causes
- LikelyResistor line of the bank 2 probe open or rubbed through to ground
- PossibleBank 2 upstream probe internally defective
- RareDamaged or heat-affected connector near the exhaust
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €0 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.