P2097 2017 Chevrolet Silverado Code - Post Catalyst Fuel Trim System High Limit Bank 1

P2097 indicates that the post-catalyst fuel trim for Bank 1 is running rich, meaning the engine control module (ECM) has detected excess fuel in the exhaust after the catalytic converter.

Symptoms may include reduced fuel efficiency, rough idling, black smoke from the exhaust, and the check engine light being illuminated.

Common causes include a faulty oxygen sensor, exhaust leaks, issues with the fuel injectors, a malfunctioning mass airflow sensor, or a clogged catalytic converter.

Yes, a dirty or clogged air filter can affect the air-fuel ratio, potentially contributing to a P2097 code by causing the engine to run rich.

Use an OBDII scanner to confirm the code, inspect the oxygen sensor and wiring, check for exhaust leaks, and test the fuel injectors and mass airflow sensor for proper operation.

While the vehicle may still be drivable, operating it with a P2097 code can lead to reduced fuel economy, poor performance, and potential damage to the catalytic converter if not addressed.

Repair costs vary but may range from $100 to $500 depending on the root cause, such as replacing an oxygen sensor, repairing an exhaust leak, or cleaning/replacing the catalytic converter.

You'll need an OBDII scanner, a multimeter for electrical testing, basic hand tools, and potentially a fuel pressure gauge or exhaust leak detection tools.

Yes, a clogged or damaged catalytic converter can cause inaccurate post-catalyst oxygen sensor readings, leading to the P2097 code.

Regular maintenance, such as replacing the air filter, inspecting the exhaust system, and using high-quality fuel, can help prevent issues that trigger the P2097 code.