Set Condition

Code P0171 will set when the following conditions are present.

• Codes P0101, P0117, P0118, P0122, P0123, P0134, P0501 and P0502 are not set.
• Engine coolant temperature is between 176°F (80°C) and 230°F (110°C).
• Steady throttle less than 91 percent.
• Vehicle speed is less than 70 MPH.
• On VIN L, engine RPM is between 1000-4000 RPM, or on VIN 1, engine RPM is 0-4000 RPM.
• EVAP canister purge duty cycle is less than 80 percent.
• Long term fuel trim is greater than 158.
• Short term fuel trim is 180.
• All conditions exist for more than 25 seconds.