P1151 2003 Ford F150 -

Question

engine takes 4-6 seconds before it starts if I make 20 min stop/ and in the morning while warming up in normal idle it wants to stall.

Answer 1

P1151 2003 Ford F150 - Lack of Upstream Heated Oxygen Sensor Switch Sensor Indicates Lean Bank 2

Possible causes:
- Oil overfill 
- Faulty Oxygen Sensor
- Fuel pressure high or low
- MAF sensor dirty/defective
- Vacuum leak on engine
- Leaking fuel injector or fuel pressure regulator
- Faulty Powertrain Control Module

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