My check enginle light just came on about a hour ago. I turn the key on and off twice. And these two numbers came up on the dashboard.

P1684 and P0171

Can anybody help by telling me with the two numbers mean for I don't have the book to show what these numbers mean..

Thank you

 

Can't find the first one in the 03-05 manuals, but have the other one.

P0171-FUEL SYSTEM 1/1 LEAN
When Monitored: With the engine running in closed loop mode, the ambient/battery
temperature above (-7°C)20°F, altitude below 8500 ft and fuel level greater than 15%.
Set Condition: If the PCM multiplies short term compensation by long term adaptive and a certain percentage is exceeded for two trips, a freeze frame is stored, the MIL illuminates and a trouble code is stored.

POSSIBLE CAUSES
GOOD TRIP EQUAL TO ZERO
RESTRICTED FUEL SUPPLY LINE
FUEL PUMP INLET STRAINER PLUGGED
FUEL PUMP MODULE
O2 SENSOR
O2 SIGNAL CIRCUIT
O2 RETURN CIRCUIT
O2 SENSOR HEATER OPERATION
THROTTLE POSITION SENSOR SWEEP
MAP SENSOR OPERATION
ECT SENSOR OPERATION
ENGINE MECHANICAL PROBLEM
FUEL CONTAMINATION/EXHAUST LEAK

 

i couldnt find much on the P1684 code

but id did find on the internet that this is cause by the PCM loosing power at some point.

Is your car acting funny at any time like loosing electrical power, misfiring, anything?


Only thing i hate about new cars. Whatever happend to the good old style engines with carbs and distributors lol.. now everything has to have a *brain* to run.

 

Haha, even the carbs can be a PITA though.

 

lol agreed

 

P 1684 just means that you have disconnected the battery recently ...it wont have any effect on the way the car runs .