Installation manual
Ford Racing Technical Support (800)FORD-788   
 - 16 - 
M-12071-A50 
REVISION 2 
12.0  2-Digit EEC-IV DIAGNOSTIC TROUBLE CODE (DTC) DEFINTIONS — Passenger Car 
DIAGNOSTIC TROUBLE CODES 
(DTC's) 
DEFINITIONS 
11 - O, R, C  System PASS 
12 - R  Cannot control rpm during KOER Self-Test high rpm check 
13 - R  Cannot control rpm during KOER Self-Test low rpm check 
14 - C  PIP circuit failure 
15 - O  PCM Read Only Memory (ROM) test failed 
15 - C  PCM Keep Alive Memory (KAM) test failed 
16 - R  Rpm too low to perform HO2S test 
18 - R  SPOUT circuit open 
18 - C  IDM circuit failure/SPOUT circuit grounded 
19 - O  Failure in PCM internal voltage 
21 - O, R  ECT out of Self-Test range 
22 - O, R, C  MAP/BARO out of Self-Test range 
23 - O, R  TP out of Self-Test range 
24 - O, R  ACT out of Self-Test range 
26 - O, R  MAF out of Self-Test range 
29 - C  Insufficient input from the Vehicle Speed Sensor (VSS) 
31 - O, R, C  EVP circuit below minimum voltage 
32 - O, R, C  EVP voltage below closed limit 
33 - R, C  EGR valve opening not detected 
34 - O, R, C  EVP voltage above closed limit 
35 - O, R, C  EVP circuit above maximum voltage 
41 - R  HO2S circuit indicates system lean (right HO2S) 
41 - C  No HO2S switch detected (right HO2S) 
42 - R  HO2S circuit indicates system rich (right HO2S) 
44 - R  Secondary Air Injection system inoperative (right side) 
45 - R  Secondary Air Injection upstream during Self-Test 
46 - R  Secondary Air Injection not bypassed during Self-Test 
51 - O, C  ECT indicated -40°C (-40°F)/circuit open 
53 - O, C  TP circuit above maximum voltage 
54 - O, C  IAT indicated -40°C (-40°F)/circuit open 
56 - O, C  MAF circuit above maximum voltage 
61 - O, C  ECT indicated 123°C (254°F)/circuit grounded 
63 - O, C  TP circuit below minimum voltage 
64 - O, C  ACT indicated 123°C (254°F)/circuit grounded 










