#

When

3-Digit Code Definitions

KOEO

CM

KOER

587

X

X

Data Communications Link (DCL) error

593

X

X

Oxygen Sensor Heater 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

623

X

Overdrive light circuit failure

624

X

X

Electronic Pressure Control solenoid or driver circuit failure

625

X

X

Electronic Pressure Control driver open in EEC

626

X

Coast clutch solenoid circuit failure (E4OD)

627

X

Converter clutch solenoid circuit failure (E4OD)

628

X

Converter clutch Lock-Up error (E4OD)

629

X

X

Converter clutch control circuit failure

631

X

Overdrive light circuit failure

632

X

Overdrive cancel switch not changing state (E4OD)

633

X

4WD switch is closed

634

X

X

Transmission Manual Lever Position Sensor circuit out of self test.

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

653

X

Transmission Control Switch was not cycled during KOER Self-Test.

654

X

MLP sensor not in park position

656

X

Converter Clutch Control continuous slip error detected