P2297 Fault Code

O2 Sensor Out of Range During Deceleration Bank 1 Sensor 1

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2297 fault code indicates that the oxygen sensor (O2 sensor) located on Bank 1, Sensor 1 is detecting oxygen levels outside the normal range during a deceleration event. This can lead to improper fuel-to-air mixture adjustments, negatively impacting engine performance and emissions.

What are the symptoms of the P2297 code?

Common symptoms associated with the P2297 code may include:

• Check Engine Light (CEL) illuminated on the dashboard.
• Poor fuel economy due to improper air-fuel mixture.
• Rough idling or hesitation during deceleration.
• Increased emissions, potentially causing the vehicle to fail an emissions test.

What causes the P2297 code?

Several factors can lead to the P2297 code, including:

• A faulty O2 sensor that fails to accurately measure oxygen levels.
• Exhaust leaks that introduce additional oxygen into the system, misleading the sensor readings.
• Issues with the engine's fuel supply, such as a clogged fuel injector or fuel filter.
• Malfunctioning engine control unit (ECU) software or calibration problems.

How to fix P2297?

To resolve the P2297 code, consider the following steps:

1. Use an OBD-II scanner to confirm the P2297 code and check for any additional fault codes.
2. Inspect the Bank 1 Sensor 1 O2 sensor for damage or wear and consider replacing it if needed.
3. Check for exhaust leaks near the O2 sensor and repair any leaks found.
4. Assess the fuel system for issues, ensuring injectors are clean and functioning properly.
5. Update or reprogram the ECU if necessary.