P2097

Post Catalyst Fuel Trim System Too Rich Bank 1

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Increased fuel consumption
Black smoke from the exhaust pipe
Unstable engine operation
Power Loss
Smell of gasoline from the exhaust pipe

Causes

Malfunction of the oxygen sensor after the catalyst
Problems with fuel injectors
Malfunction of the mass air flow sensor (MAF)
Leaking fuel under pressure
Low fuel rail pressure

How to Fix

Check the condition of the oxygen sensor after the catalyst
Diagnose fuel injectors for leaks
Check the readings of the mass air flow sensor
Examine the fuel system for leaks
Check the pressure in the fuel rail

Related codes

P2096 P2098 P0172