FORD, MERCURY
Reported code forms P0171
MALFUNCTION INDICATOR LAMP ON AND DIAGNOSTIC TROUBLE CODES P0171/P0174 OR P1072/P0175 STORED IN MEMORY OR AS HARD FAULTS. HESITATION, LACK OF POWER OR RUNS ROUGH CONDITION. *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, 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, MERCURY
Reported code forms P0171
SOME VEHICLES MAYE XHIBIT EXHIBIT A MALFUNCTION INDICATOR LAMP ILLUMINATED WITH DIAGNOSTIC TROUBLE CODE P0171 AND P0172 STORED IN MEMORY. *TT
FORD, MERCURY
Reported code forms P0171
BRIEF INFORMATION REGARDING VEHICLES WITH MALFUNCTION INDICATOR LIGHT ON WITH DIAGNOSTIC TROUBLE CODE P0171 SET. *TT
FORD, MERCURY
Reported code forms P0171
VEHICELS BUILT IN JANUARY 1997 MAY EXHIBIT MIL ILLUMINATION WITH A CODE P0171. *TW
FORD, MERCURY
Reported code forms P0171
VEHICLES MAY EXHIBIT MIL ILLUMINATION WITH A CODE OF P0171 - THIS MAY BE CAUSED BY A DISCONNECTED FUEL PRESSURE REGULATOR VCUUM HOSE. *TW
FORD, LINCOLN, MERCURY
Reported code forms P0171
CONCERN FOR VEHICLES EXHIBITING LEAN CODES P0171 & P0174 (VACUUM LEAK). *TT