P2298O2 Sensor Out of Range During Deceleration (Bank 2 Sensor 1)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2298 is the bank 2 version of P2297 and exists only on engines with two cylinder banks, each with its own upstream oxygen sensor. Three GM tables show the two readings of the code. The 2005 3.5L V6 (L66) tests during fuel cut-off with coolant above 69 °C and below 2,200 rpm, faulting a wide-band output above 4.5 V or below 2.9 V, over two drive cycles. The Bosch-managed 2005 V6 (LP1/LY7) works the other way round and flags a signal above 3.7 V for 10 s while every injector is firing and the target is richer than lambda 1.6. GM's 2024 tables (24OBDG07) set it for a lambda equivalent above 12 from the corrected pump current with the ceramic hotter than 655 °C, 10 s, two trips. No bulletin names P2298. Bank 2 is the side without cylinder 1.
- What you may notice
- Malfunction indicator lamp on after two trips
- Usually no noticeable change in driving behaviour
- Bank 2 fuel trim values may look unusual
- Likely causes
- LikelyBank 2 upstream wide-band sensor aged or contaminated
- PossibleExhaust leak on bank 2 ahead of the sensor
- RareDamaged sensor lead or connector on bank 2
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Easy · 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.