Powertrain, generic (extended)

P2297 O2 Sensor Out of Range During Deceleration (Bank 1 Sensor 1)

Check engine lightOn

EmissionsRelevant

Drive cycleRequired

Limp modeNo

P2297 concerns the upstream oxygen sensor of bank 1 and the moment when fuel is cut on deceleration and the sensor should read almost pure air. Diesel calibrations compare the reading in overrun with a modelled value: GM's 6.6L LML faults a gap between measured and calculated value above 0.06 to 0.07, the 3.0L LZ0 a deviation beyond 5 percent (Type B). On the 2023 Jeep Gladiator 3.0L diesel, Stellantis TSB 25-002-24 checks the O2 adaptation after a coast-down and replaces the sensor above 0.0282. Bosch-based petrol engines read the code the other way: with all injectors firing, a signal looking like fuel cut-off sets it (Saab 9-5 2011 LDK: 4 s, Type B; GM 2005 V6 LP1/LY7: over 3.7 V for 10 s). GM bulletin 24-NA-094 lists it for the LZ0; P2298 is bank 2.

Likely causes

Upstream wide-band sensor aged or drifted (wrong reading in air)

Exhaust leak ahead of the sensor drawing in outside air

Air-mass or fuel model error (MAF, injector leakage, EGR) skewing the expected value

Engine software needing an update (GM 3.0L LZ0 2024, bulletin 24-NA-094)

Symptoms

Malfunction indicator lamp on after two trips
Usually no noticeable change in driving behaviour
Possibly stored with P0133 or fuel-quantity codes

Repair estimate

DifficultyEasyDIY possible

Parts and labour€0–350

Time0.3–1.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

oxygen sensor

References: gsi.ext.gm.com, gsi.ext.gm.com, static.nhtsa.gov, saabwisonline.com.