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1996 Ford F-150 Special 4.9L MIL Lamp on
failed im240 test. codes po411, secondary air wrong flow, and po420, catalyst efficiency low. all tests on airb and aird valve o.k. sol. checks o.k. sets code after 10 miles. converter was replaced. still sets po420 code. this truck has two cats. one after the...
FIX posted 4/14/2003
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Message Closed w/FIX
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Related Documents & Media | VIN | 12F39R56NF |
| Engine | 4.9 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
Trouble Codes
| 411 | secondary air wrong |
| 420 | catalyst efficiency |
Message Closed w/FIX
Vehicle Data
1996 Ford F-150 Special
| VIN | 12F39R56NF |
| Engine | 4.9 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
Trouble Codes
| 411 | secondary air wrong |
| 420 | catalyst efficiency |
Video