P2297 — O2 Sensor Out of Range During Deceleration Bank 1 Sensor 1

P2297: O2 Sensor Out of Range During Deceleration Bank 1 Sensor 1 — what it means, the affected system and what to check before replacing parts.

Meaning, symptoms, causes and checks

O2 Sensor Out of Range During Deceleration Bank 1 Sensor 1. Basic catalogue definition; diagnostic details have not yet been reviewed.

Affected system: Powertrain

Symptoms

  • The engine warning light may be the only obvious sign.
  • Some vehicles may show hesitation or rough running, particularly when slowing down.

Possible causes

  • An exhaust leak near the upstream oxygen sensor can alter its reading.
  • The bank 1 upstream oxygen sensor may be slow or defective, or its wiring may be damaged.

What to check

  • Confirm P2297 and locate bank 1, upstream oxygen sensor (sensor 1).
  • Inspect exhaust joints for leaks and check the sensor wiring and connector.
  • Review the upstream sensor's response during deceleration against vehicle-specific expected behaviour before replacing parts.

Also written as: P2297-00, P229700 (some scan tools add the fault-type byte, e.g. -00).