F 150 4WD Pickup V8-5.4L CNG VIN M (2001)

P0135 - P0139: Testing and Inspection
P0135
For diagnosis of code P0135 refer to chart
Bxxxx, Cxxxx, P0102 - P0171
If there is no link in the chart then:
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This code is not a valid code for this vehicle
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Or information published by the manufacturer for this vehicle did not include this code