AutoCodes – Ford – P2297 Ford

P2297 Ford Code - Oxygen Sensor Out of Range During Deceleration Bank 1 Sensor 1

Quick Answer

During a Deceleration Fuel Shut-Off (DFSO) event, the Powertrain Control Module (PCM) monitors how quickly the rear heated oxygen sensor (HO2S) switches from rich to lean. Common causes include Exhaust leaks before or near the Rear Heated Oxygen Sensor (HO2S), Faulty Rear Heated Oxygen Sensor (HO2S), Rear Heated Oxygen Sensor (HO2S) harness is open or shorted. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: P2297 Ford indicates Oxygen Sensor Out of Range During Deceleration Bank 1 Sensor 1.
Common causes: Common causes include Exhaust leaks before or near the Rear Heated Oxygen Sensor (HO2S), Faulty Rear Heated Oxygen Sensor (HO2S), Rear Heated Oxygen Sensor (HO2S) harness is open or shorted.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

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Code Popularity 9,244

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 20, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P2297 Ford Description

During a Deceleration Fuel Shut-Off (DFSO) event, the Powertrain Control Module (PCM) monitors how quickly the rear heated oxygen sensor (HO2S) switches from rich to lean. The measured rate of the rich to lean switch is compared to a calibrated threshold value. The threshold value takes into account the level of oxygen in the catalyst, which has an impact on how quickly the rich to lean switch occurs. The test fails when the measured value is slower than the threshold value.

OBDII Code P2297 Ford - Oxygen Sensor Out of Range During Deceleration Bank 1 Sensor 1 - AutoCodes.com — P2297 Ford Code - Oxygen Sensor Out of Range During Deceleration Bank 1 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P2297 Ford?

Exhaust leaks before or near the Rear Heated Oxygen Sensor (HO2S)
Faulty Rear Heated Oxygen Sensor (HO2S)
Rear Heated Oxygen Sensor (HO2S) harness is open or shorted
Rear Heated Oxygen Sensor (HO2S) circuit poor electrical connection

How to Fix the DTC P2297 Ford?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2297 Ford code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.