FORD, MERCURY
Reported code forms P0171
MALFUNCTION INDICATOR LAMP COMING ON WITH DIAGNOSTIC TROUBLE CODES (DTCS) P0171, P0172, P0174 AND/OR P0175 (FUEL SYSTEM TOO RICH OR LEAN). *TT
HomeP0171 · Manufacturer communications
P0171 · Manufacturer communications
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
FORD
Reported code forms P0171
MALFUNCTION INDICATOR LAMP (MIL) ON WITH DIAGNOSTIC TROUBLE CODE (DTC) P0171, P0172, P0174 OR P0175. *TT
FORD
Reported code forms P0171
HARD START/LONG CRANK WHEN COLD OR STUMBLES/SURGES DURING DRIVE-AWAY. POSSIBLE DIAGNOSTIC TROUBLE CODES P0171, AND P0174 OR P0172 AND P0175. *TT
FORD
Reported code forms P0171
SOME VEHICLES EQUIPPED WITH A 2.5/3.0L ENGINE MAY EXHIBIT A SURGE, HESITATION, ROUGH IDLE OR MALFUNCTION INDICATOR LAMP ILLUMINATED WITH DIAGNOSTIC TROUBLE CODES P0171, P0174, P0175. *TT
FORD, LINCOLN, MERCURY
Reported code forms P0171
SOME VEHICLES MAY EXHIBIT VACUUM OR AIR LEAKS IN THE INTAKE MANIFOLD AND / OR ENGINE SYSTEM CAUSING DIAGNOSTIC TROUBLE CODES P0171 AND OR P0174. *TT
FORD
Reported code forms P0171
SOME VEHICLES MAY EXHIBIT SURGE, HESITATION, ROUGH IDLE OR MALFUNCTION NDICATOR LAMP ON WITH DIAGNOSTIC TROUBLE CODES P0171, P0172, NP0174, P0175. *ET
FORD
Reported code forms P0171
SOME VEHICLES MAY EXHIBIT SURGE, HESITATION OR ROUGH IDLE OR MALFUNCTION INDICATOR LAMP ON W/ DIAGNOSTIC TROUBLE CODES P0171, P0172, P0174, AND P0175. *JB