I've got two codes. one is PO303,(Cyl 3 misfire detected), and PO171, ( System too lean bank 1) What should I look at 1st?
Aug 30, 2010 at 5:32 PM
1997 Ford F150 2 obd codes
1997 FORD F-150
JOHN KAHLE
- MEMBER
- 7 POSTS
- FOLLOW
Advertisement
P0303-check the sparkplug/comepression and injector for no.3 cyl.
P0171
Lean fuel condition could be caused by one of the following below:
1.Vacuum leaks
2.EGR and PCV valve.
3.Low fuel pressure.
4.Dirty fuel injectors.
5.Mass Air Flow Sensor.
6.Oxygen Sensor.
P0171
Lean fuel condition could be caused by one of the following below:
1.Vacuum leaks
2.EGR and PCV valve.
3.Low fuel pressure.
4.Dirty fuel injectors.
5.Mass Air Flow Sensor.
6.Oxygen Sensor.
Aug 30, 2010 at 6:48 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.