What this code means
P2097 means the PCM may be seeing a rich correction pattern in the post-catalyst fuel trim calculation.
What the vehicle may do
- The vehicle may drive normally.
- A warning light may be present.
- Fuel-control related drivability symptoms can be possible depending on the underlying condition.
Possible fault areas
- Possible exhaust leakage or restriction in the monitored section of the exhaust system.
- Possible A/F sensor signal concern.
- Possible upstream fuel, injector, air-fuel sensor, oxygen sensor, or misfire related condition that can affect fuel trim judgment.
Diagnostic path
Code meaning and diagnostic direction
For this 2020 to 2025 Honda CR-V 2.0 hybrid, P2097 means the post catalyst fuel trim system is too rich. In plain language, the PCM is seeing a fuel trim deviation after the catalyst that does not look right. The vehicle may drive normally, or it may have fuel-control related symptoms depending on how the fault is showing up. The broad areas to keep in mind are possible exhaust system leakage or restriction between the upstream A/F sensor and the secondary oxygen sensor, and possible A/F sensor signal issues. Start with the basic system checks and follow a structured diagnostic approach before narrowing in on the P2097 path.
Check other codes first
Before chasing P2097 by itself, look for any related air-fuel sensor, oxygen sensor, fuel trim, injector, or misfire faults that are present. If other codes or indicated systems are there, handle those first. That keeps this from turning into a false P2097 diagnosis caused by a problem upstream in the fuel or combustion control path.
Reproduce the operating conditions
Next, run the confirmation routine. Enter maintenance mode and start the engine. Hold engine speed at 3,000 rpm with no load, in P or N, until the radiator fan comes on. Then turn the vehicle to OFF, LOCK mode.
Monitor gate for P2097
Now test-drive the vehicle with HDS showing ECT Sensor 1 above 158 °F (70 °C), the transmission in D, and drive at a steady speed between 15 - 75 mph (25 - 120 km/h) for 27 seconds or more. After that monitor HDS OBD STATUS for P2097. Treat those conditions as the monitor gate; do not judge the code until the vehicle has been operated under those conditions.
Exhaust system visual inspection
If the P2097 path continues, inspect the exhaust system between the A/F sensor, Sensor 1, and the secondary HO2S, Sensor 2. You are looking for leakage in that section. Also inspect the exhaust system for clogs or restrictions. The expected result is no leaks, and no clogs or restrictions.
Interpreting the inspection
If the exhaust inspection is abnormal, the diagnostic direction is an exhaust system component problem. If the exhaust inspection is normal, the diagnostic direction points to the A/F sensor, Sensor 1. Keep that separation clear: first prove the exhaust path is not leaking or restricted, then use the result to decide whether the fault stays in the exhaust system or moves toward the A/F sensor side.
Verify the repair
After the fault has been corrected, verify the repair and confirm the code stays gone by running the same operating conditions used for the confirmation routine. The takeaway on P2097 is simple: clear the prerequisite faults first, reproduce the monitor conditions, inspect the exhaust path between Sensor 1 and Sensor 2, and let that inspection decide whether you stay with the exhaust system or move to the A/F sensor. For more diagnostic training, visit stepdiagnostics.com.
Final check
Diagnose P2097 by handling related faults first, reproducing the monitor conditions, then separating exhaust system faults from A/F sensor direction based on the inspection result.
For more guided automotive diagnostics, visit STEP Diagnostics.
