#

When

2-digit Code Definitions

KOEO

KOER

CM

NC

X

X

X

No Codes

11

X

X

X

System pass

12

X

Cannot control RPM during ER Self-Test high RPM check

13

X

Cannot control RPM during ER Self-Test low RPM check

14

X

Pip circuit failure

15

X

EEC read only memory ROM test failed

X

EEC keep alive memory KAM test failed

16

X

IDM signal not received

X

RPM too low to perform HEGO test

17

X

RPM below Self-Test limit with Idle Air Control off

18

X

SPOUT circuit open or spark angle word failure

X

IDM circuit failure or SPOUT circuit grounded

19

X

Failure in EEC internal voltage

X

RPM erratic, dropped too low during test

X

Cylinder Identification CID circuit failure

21

X

X

ECT out of self test range

22

X

X

MAP/BP sensor out of self test range

23

X

X

TP sensor out of self test range

24

X

X

ACT sensor out of self test range

25

Knock not sensed during dynamic test

26

X

X

VAF/MAF out of self test range

X

X

TOT sensor out of self test range (E4OD)

28

X

X

VAT sensor out of self test range

X

Loss of IDM, right side

29

X

Insufficient input from vehicle speed sensor

31

X

X

X

PFE or EVP circuit below minimum voltage

32

X

X

X

EVP voltage below closed limit

33

X

X

EGR valve opening not detected

34

X

X

X

EVP voltage above closed limit

35

X

PFE or EVP circuit above closed limit

39

X

AXOD converter bypass clutch not applying properly

41

X

HEGO sensor circuit indicates system lean (right side)

X

No HEGO switching detected always lean (right side)

42

X

HEGO sensor circuit indicates system rich

X

No HEGO switching detected always rich (right side)

43

X

HEGO lean at WOT

44

X

Thermactor air system inoperative right side

45

Thermactor air upstream during self test

45

X

Thermactor air upstream during self test

X

DIS coil pack 3 circuit failure or coil 1 primary circuit failure

46

X

Thermactor air not bypassed during self test

X

DIS coil pack 1 circuit failure or coil 2 primary circuit failure

47

X

4WD switch closed (E4OD)

X

Measured air flow too low at base idle

48

X

Measured air flow too high at base idle

X

Loss of IDM, left side

49

X

SPOUT signal default to 10° BTDC

X

1 - 2 shift error (E4OD)

51

X

X

ECT reads 40°F or circuit open

52

X

X

Power steering pressure switch always open or closed

53

X

X

TP circuit above maximum voltage

54

X

X

ACT sensor circuit open

55

X

Key power input to processor is open

56

X

X

VAF or MAF circuit above maximum voltage

X

X

TOT reads 40°F or circuit open (E4OD)

57

X

Octane adjust service pin in use / circuit grounded

X

AXOD Neutral pressure switch circuit failed open

58

X

X

VAT indicated -40°F / circuit open

59

X

X

2 - 3 shift error (E4OD)

X

X

Low speed fuel pump circuit failure

61

X

X

ECT reads 254°F or circuit grounded

62

X

4/3 or 3/2 pressure switch circuit failed open

X

Converter clutch error (E4OD)

63

X

X

TPS circuit below minimum voltage

64

X

ACT sensor grounded or input reads 254°F

65

X

Overdrive cancel switch open, no change seen (E4OD)

X

Never went to closed loop fuel

66

X

X

MAF sensor input below minimum voltage

X

X

TOT grounded or reads 290°F (E4OD)

67

X

Neutral Pressure switch open

X

Clutch switch circuit failure

X

X

Neutral/drive switch open or A/C on

X

X

MLP sensor out of range or A/C on (E4OD)

68

X

X

VAT circuit grounded

X

X

X

Transmission Oil Temperature Switch failed open

69

X

X

3 4 shift error

70

X

EEC data transmission circuit failed

71

X

Software re-initialization detected or Cluster Control Assembly circuit failed

72

X

Insufficient MAF/MAP change during Dynamic Response Test

X

Power interruption detected or Message Center Control Assembly circuit failed

73

X

X

Insufficient TP change during Dynamic Response Test

74

X

Brake On/Off switch failure or not actuated

75

X

Brake On/Off switch failure always ON

76

X

Insufficient VAT change during Dynamic Response Test

77

X

Brief WOT not sensed during self-test / Operator error

79

X

A/C or defrost on during self test

81

X

Air management 2 circuit failure

82

X

Air management 1 circuit failure

83

X

EGR Control solenoid circuit failure

X

High speed electro-drive fan circuit failure

X

X

Low speed fuel pump relay circuit open

84

X

X

EGR vacuum solenoid circuit failure

85

X

X

Canister purge solenoid circuit failure

86

X

Adaptive fuel limit reached

X

3 – 4 Shift solenoid circuit failure

87

X

X

X

Fuel pump primary circuit failure

88

X

Electro-drive fan circuit failure

X

Loss of dual plug input control

89

X

Converter clutch solenoid circuit failure

91

X

Shift solenoid 1 circuit failure (E4OD)

X

HEGO sensor circuit indicates system lean (left side)

X

No HEGO switching detected (left side)

92

X

Shift solenoid 2 circuit failure (E4OD)

X

No HEGO switching detected always rich (left side)

93

X

Coast clutch solenoid circuit failure (E4OD)

94

X

Converter clutch solenoid circuit failure (E4OD)

X

Secondary Air Injection system inoperative (left side)

95

X

X

Fuel pump secondary circuit failure EEC to ground

96

X

X

Fuel pump secondary circuit failure battery to EEC

97

X

Overdrive cancel indicator light circuit failure (E4OD)

98

X

Electronic pressure control driver open in EEC (E4OD)

X

Hard fault present

99

X

X

Electronic pressure control circuit failure (E4OD)

X

EEC system hasn’t learned to control idle

NC

X

X

X

No Codes

è

               KOEO = Key On Engine Off

è

       KOER = Key On Engine Running

è

CM = Continues Memory

#

When

3-Digit Code Definitions

KOEO

KOER

CM

NC

X

X

X

No Codes

111

X

X

X

System pass

112

X

X

ACT sensor circuit below minimum voltage, grounded, or reads 254°F

113

X

X

ACT sensor circuit above maximum or reads 40°F

114

X

X

ACT outside test limits during KOEO or KOER tests

116

X

X

ECT outside test limits during KOEO or KOER tests

117

X

X

ECT sensor circuit below minimum voltage, grounded, or reads 254°F

118

X

X

ECT sensor circuit above maximum or reads 40°F

121

X

X

X

Closed throttle voltage higher or tower than expected

122

X

X

TP sensor circuit below minimum voltage

123

X

X

TP sensor circuit above maximum voltage

124

X

TP sensor voltage higher than expected

125

X

TP sensor voltage lower than expected

126

X

X

BP or MAP sensor higher or lower than expected

128

X

MAP vacuum circuit failure

129

X

Insufficient MAF or MAP change during dynamic responded test

136

X

HEGO sensor circuit shows system always lean

137

X

HEGO sensor circuit shows system always rich

139

X

No HEGO sensor switching detected or disconnected

144

X

No HEGO sensor switching detected or disconnected

157

X

MAF sensor below minimum voltage or disconnected

158

X

X

MAF sensor above maximum voltage

159

X

X

MAF sensor higher or lower than expected during KOEO / ER

167

X

Insufficient TP change during dynamic response test

171

X

Fuel system at adaptive limit, HEGO unable to switch

172

X

X

HEGO shows system always lean

173

X

X

HEGO shows system always rich

174

X

HEGO switching time is slow

175

X

Fuel system at adaptive limit, HEGO unable to switch (front side)

176

X

HEGO shows system always lean (front side)

177

X

HEGO shows system always rich (front side)

178

X

HEGO switching time is slow

179

X

Fuel at lean adaptive limit at part throttle; system rich

181

X

Fuel at rich adaptive limit at part throttle; system lean

182

X

Fuel at lean adaptive limit at idle; system rich

183

X

Fuel at rich adaptive limit at idle; system lean

184

X

MAF higher than expected

185

X

MAF lower than expected

186

X

Injector pulse width longer than expected

187

X

Injector pulse width shorter than expected

188

X

Fuel at lean adaptive limit at part throttle; system rich

189

X

Fuel at rich adaptive limit at part throttle; system lean

191

X

Fuel at lean adaptive limit at idle; system rich

192

X

Fuel at rich adaptive limit at idle; system lean

211

X

PIP circuit fault

212

X

Loss of IDM input to EEC or SPOUT circuit grounded

213

X

SPOUT circuit open

214

X

CID circuit failure

215

X

EEC detected coil 1 primary circuit failure

216

X

EEC detected coil 2 primary circuit failure

217

X

EEC detected coil 3 primary circuit failure

218

X

Loss of IDM signal (left side)

219

X

SPOUT disconnected, to10 degrees BTDC

222

X

Loss of IDM signal (right side)

223

X

Loss of Dual Plug Inhibit control

224

X

Erratic IDM input to processor

225

X

Knocked not sensed during dynamic response test

226

X

IDM signal not received

311

X

Thermactor air system inoperative (right side)

312

X

Thermactor air upstream during self test

313

X

Thermactor air not bypassed during self test

314

X

Thermactor air system inoperative (left side)

326

X

X

EVP or DPFE circuit voltage lower than expected

327

X

X

X

EVP or DPFE circuit below minimum voltage

328

X

X

X

EGR valve closed voltage lower than expected

332

X

X

Insufficient EGR flow detected

334

X

X

X

EGR valve closed voltage higher than expected

335

X

EGR sensor voltage out of Self-Test range

336

X

X

EVP or DPFE circuit voltage above maximum voltage

337

X

X

X

EVP or DPFE circuit above maximum voltage

338

X

ECT lower than expected

339

X

ECT higher than expected

341

X

Octane Adjust Service Pin in use or circuit open

411

X

Cannot control rpm during KOER low RPM check

412

X

Cannot control rpm during KOER high RPM check

452

X

Insufficient input from vehicle speed sensor

511

X

EEC processor Read Only Memory (ROM) test failure

512

X

EEC processor Keep Alive Memory (KAM) test failure

513

X

Failure in EEC processor internal voltage

519

X

Power steering pressure switch circuit open

521

X

Power steering pressure switch did not change state

522

X

Vehicle not in PARK or NEUTRAL during KOEO

524

X

X

Low speed fuel pump circuit open

525

X

Vehicle in gear or A/C on during Self-Test

526

X

Neutral Pressure Switch closed or A/C on

527

X

Neutral Drive Switch open or A/C on

528

X

Clutch Switch Circuit failure

529

X

Data Communications Link or EEC processor failure

533

X

Data Communications Link or Electronic Instrument Cluster circuit failure

536

X

X

Brake On/Off circuit failure / switch not actuated during KOER test

538

X

Insufficient RPM change during KOER dynamic response test / Operator error

539

X

A/C or Defroster ON during KOEO test

542

X

X

Fuel pump secondary circuit failure: EEC to ground

543

X

X

Fuel pump secondary circuit failure: Battery to EEC

551

X

Idle Air Control circuit failure

552

X

Air management 1 circuit failure

553

X

Air management 2 circuit failure

554

X

Fuel Pressure Regulator Control solenoid circuit failure

556

X

X

Fuel pump primary circuit failure

557

X

X

Fuel Pump Relay primary circuit failure

558

X

EGR Vacuum Regulator circuit failure

559

X

Air Conditioning On relay circuit failure

563

X

High Speed Electro-Drive Fan circuit failure

564

X

Electro-Drive Fan circuit failure

565

X

Canister purge circuit failure

566

X

3 – 4 Shift Solenoid failure

569

X

Canister purge 2 circuit failure

617

X

1 - 2 shift error (E4OD)

618

X

2 - 3 shift error (E4OD)

619

X

3 - 4 shift error (E4OD)

621

X

Shift solenoid #1 circuit failure

622

X

Shift solenoid #2 circuit failure

624

X

X

Electronic Pressure Control solenoid or driver circuit failure

625

X

Electronic Pressure Control driver open in EEC

626

X

Coast clutch solenoid circuit failure (E4OD)

627

X

X

Converter clutch solenoid circuit failure (E4OD)

628

X

X

Converter clutch Lock-Up error (E4OD)

629

X

Converter clutch control circuit failure

631

X

Overdrive cancel indicator light circuit failure

632

X

Overdrive cancel switch not changing state (E4OD)

633

X

4WD switch is closed

634

Manual Lever Position sensor voltage out of self test range or A/C on

636

X

X

TOT sensor voltage out of self test range

637

X

X

TOT sensor circuit above maximum voltage

638

X

X

TOT sensor circuit below minimum voltage

639

X

X

Insufficient input from the Transmission Speed Sensor

641

X

Shift solenoid #3 circuit failure

643

X

X

Converter Clutch Control circuit failure

645

X

Incorrect gear ratio obtained for first gear

646

X

Incorrect gear ratio obtained for second gear

647

X

Incorrect gear ratio obtained for third gear

648

X

Incorrect gear ratio obtained for fourth gear

649

X

Electronic Pressure Control range failure

651

X

Electronic Pressure Control circuit failure

652

X

Modulated Converter Clutch Control solenoid output circuit error

654

MLP sensor not in park position

656

Converter Clutch Control continuous slip error detected

998

Hard fault present

NC

X

X

X

No Codes

è

               KOEO = Key On Engine Off

è

       KOER = Key On Engine Running

è

CM = Continues Memory