Hey Guys!

1996 F-150 with 5.0

Am getting some weird codes from my code reader. The engine just got all new O2 sensors but the truck is acting like it has no power when warm. The codes I am getting are as follows: p0174, p1151, p1131, p0155, p0141, p0135 and p0171. It's my Dad's truck and is his daily driver. Just put new plugs in it this week. I've read through some of the other threads about "lack of power" and I think we are installing a coolant temp sensor and TPS. Any other ideas for a fix other than a charcoal fire would be greatly appreciated!

Thanks
Corey

 

This will explain them quicker than I can

http://www.obd-codes.com/trouble_codes/ford/

 

Is there one thing that would cause all those sensors to those codes? We changes the air bypass attached to the throttle body today....seems a bit better. Still has a feel of power loss.

 

You are running lean. The codes indicate a problem with the o2 sensors. I would start by changing them out for new ones.

 

O2 sensors were changed last week

 

I assume you used Bosch o2 sensors. Check your fuel pressure and clean the MAF. Pull the vacuum line running to FPR with the motor running and see if it is working at all. Something is causing the motor to run lean. All the codes point to your o2 sensors being bad. It is possible the elements are not heating up because of the lean condition though.

 

also possible that you got a bad O2 sensor from the parts store.

 

Was you getting codes before you did o2 sensors and plugs and so fourth. Also are you pulling 7 codes at once or are they intermittent codes.

 

I don't have an OBD2 list for codes. Can you list the meaning for each code?

 

I clear the code(s), take the truck out and get a Bank 2 Sensor 1 O2 sensor code. Dad drove the truck all weekend and had 7 codes listed when he got home today. We changed the air bypass (suggested by the guy at the parts store) and the coolant temp sensor today. Could a failing fuel pump cause the engine to run lean?