Installation manual

- 17 - Ford Racing Technical Support (800)FORD-788
M-12071-A50
REVISION 2
66 - C MAF circuit below minimum voltage
67 - O Park/Neutral Position (PNP) switch circuit open - or A/C ON
during Self-Test
77 - R Brief WOT not sensed during Self-Test/Operator error
79 - O A/C on/Defrost on during Self-Test
81 - O Secondary Air Injection Diverter (AIRD) solenoid circuit failure
82 - O Secondary Air Injection Bypass (AIRB) solenoid circuit failure
84 - O EGR Vacuum Regulator (EVR) circuit failure
85 - O Canister Purge (CANP) circuit failure
87 - O,C Fuel pump primary circuit failure
91 - R HO2S circuit indicates system lean (left HO2S)
91 - C No HO2S switching detected (left HO2S)
92 - R HO2S circuit indicates system rich (left HO2S)
94 - R Secondary Air Injection system inoperative (left side)
95 - O,C Fuel pump secondary circuit failure
96 - O,C Fuel pump secondary circuit failure
98 - R Hard fault is present - FMEM mode
NO DTC's * Unable to initiate Self-Test or unable to output DTC's *
DTC's NOT LISTED DTC's displayed are not applicable to the vehicle being tested
KEY: O = Key On Engine Off (KOEO) R* = Engine Running (ER) C = Continuous Memory
Some of the above codes can be expected and should not be a cause for concern. These are
commonly referred to as 'Soft Codes' which indicates that a fault may be present, but that the
PCM will not activate the 'Check Engine' light, nor will it enter into Fault Mode Engine
Management (FMEM), or 'Limp Home Mode'. These codes typically include the following:
 29
 33
 44
 45
 46
 67 (KOER Is not possible when this code is present, See page 12, Section C)
 81
 82
 85
 87
 94
 95
 96
* Please refer to Page 12, Section C, for help on performing Engine Running (ER) Diagnostics