Having problems with your 2003 Ford Ranger Regular Cab ?

2003 Ford Ranger 4x4 extended cab- diagnostics checked and got these codes- P0171, P0174, P0300, P0316. Can you tell me what they mean?

Posted / edited by AnonymousUser on : 11-02-2019

Answers :

P0171------ system too lean bank#1
\015\012Po174------ system too lean bank#2
\015\012For these 2 codes, try cleaning the maf sensor (mass air flow), that is mounted in the big black hose that goes from the air filter housing to the throttle plate, if it is dirty, that will cause those 02 sensors to send a signal to the computor to lean the air fuel mixture. If cleaning it doesn't work, the sensors will probably need changing.
\015\012P0300---- Random/multiple cylinder misfire
\015\012P0316---- Cylinder misfire at start up---- first 100 revolutions.
\015\012On those 2 codes, you have to do some testing to find out why there is a misfire.
\015\012Possible causes:
\015\012dirty/malfunctioning injectors
\015\012weak coil pack
\015\012fowling spark plugs/wires
\015\012Low fuel pressure
P0171 System too lean (bank 1) P0174 System too Lean (bank 2) P0300 Random/Multiple Cylinder Misfire Detected P0316 Misfire Detected 1st 1000 revs That's what the codes are. I don't know what engine you have, whether it's a distributor or coil packs, but if you take care of the misfire (probably plugs and wires) it should take care of the lean condition. Having a bank 1 and bank 2, I'm assuming it's a V6
Repair Help & Product Troubleshooting for 2003 Ford Ranger Regular Cab

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