P2630 code meaning
O2 Sensor Pumping Current Trim Circuit Low (Bank 2 Sensor 1)
Powertrain system Generic code P26xx codes Check engine light
What P2630 means
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 gasoline 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.
P2630 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.3 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2630
- Check engine light
- Bank 2 running in open loop
- Fuel economy slightly worse
Common causes of P2630
- Most likelyResistor line of the bank 2 probe open or rubbed through to ground
- PossibleBank 2 upstream probe internally defective
- Less likelyDamaged or heat-affected connector near the exhaust
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Oxygen sensor bank2 sensor1Sensor calibration resistorOxygen sensor wiring
What each part of P2630 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 6 | Area: computer (engine control module) and output circuits. |
| 30 | The exact fault in that area. |
What to do next
- Note P2630 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2630
What does P2630 mean?
P2630 means "O2 Sensor Pumping Current Trim Circuit Low (Bank 2 Sensor 1)". P2630 reports a trim input that is too low at the upstream wide-band probe of bank 2, the cylinder bank without cylinder 1. It is a generic code, so it means the same on every make.
Is it safe to drive with P2630?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P2630 fail an emissions test?
Yes, it can. P2630 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2630 to fix?
Difficulty: medium. A typical repair takes 0.3 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2630 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.