
1999 Ford F-150 4.2L MIL Lamp on
Ford truck came in with mil on. Checked for codes, p0171, p0172 both stored. checked for usual vacuum leaks at pcv hose and around intake gaskets. monitored both o2 sensors and maf meter. all appears to be within spec and working. truck is running ok and no ot...
FIX posted 4/7/2010
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Message Closed w/FIX
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VIN | 1FTZX1720X |
Engine | 4.2 L / 6 cyl / GAS |
Trans | 5-speed Standard |
Delivery | FI |
Emissions | OBD-II Compliant |
Symptoms | MIL Lamp On |
Trouble Codes
P0171 | Fuel System Too Lean (Bank 1) |
P0172 | Fuel System Too Rich (Bank 1) |
Message Closed w/FIX
Vehicle Data
1999 Ford F-150
VIN | 1FTZX1720X |
Engine | 4.2 L / 6 cyl / GAS |
Trans | 5-speed Standard |
Delivery | FI |
Emissions | OBD-II Compliant |
Symptoms | MIL Lamp On |
Trouble Codes
P0171 | Fuel System Too Lean (Bank 1) |
P0172 | Fuel System Too Rich (Bank 1) |