2 and 3 Digit Codes
NOTE: Diagnostic fault codes indicate that the Engine Controller has detected condition outside of set limits. Diagnostic fault codes do not necessarily identify failed component.
DTC NO. SCAN TOOL DISPLAY DESCRIPTION OF CONDITIONS
11 No reference signal No camshaft reference
during cranking signal detected during engine cranking.
13+** Slow change in idle No variation in MAP
MAP signal signal is detected
or
No change in MAP No difference recognized
from start to run between engine MAP reading and barometric pressure reading at start-up.
14+** MAP voltage too low MAP sensor input below minimum acceptable voltage.
or
MAP voltage too high MAP sensor input above maximum acceptable voltage.
15** No vehicle speed signal No vehicle distance (speed) sensor signal detected during road load conditions.
17* Engine is cold too long Engine coolant temperature remains below normal operating temperatures during vehicle travel (thermostat).
21** O2 signal stays at center Neither rich nor lean condition is detected from the oxygen sensor input.
or
02 signal short to voltage Oxygen sensor input voltage maintained above normal operating range.
22+** Coolant sensor voltage low Sensor input below the minimum acceptable voltage
or
Coolant sensor voltage high Sensor input above the maximum acceptable voltage.
23 Charge air temp. sensor Sensor input above
voltage high maximum acceptable voltage
or
Charge air temp. sensor Sensor input below
voltage low minimum acceptable voltage.
24+** TPS voltage low Sensor input below the minimum acceptable voltage
or
TPS voltage high Sensor input above the maximum acceptable voltage.
25** ISC motor circuits An open or shorted condition detected in one or more of the ISC control circuits.
27+** Injector # X control circuit Injector output driver does not respond properly to the control signal.
31** Purge solenoid circuit An open or shorted condition detected in the purge solenoid circuit.
32** EGR solenoid circuit An open or shorted condition detected in the EGR solenoid
or
EGR system failure Required change in air fuel mixture not detected during diagnostic test (California only)
33 A/C clutch relay circuit An open or shorted condition detected in the A/C clutch relay circuit.
34 S/C solenoid circuits An open or shorted condition detected in the speed control vacuum or vent solenoid circuits.
37 TCC lock-up solenoid An open or shorted condition detected in the torque converter part throttle unlock solenoid circuit (automatic trans).
41+** Alternator field circuit An open or shorted condition detected in the alternator field control circuit.
42* ASD relay control circuit An open or shorted condition detected in the auto shut down relay circuit.
or
No ASD voltage sense No ASD voltage sensed at controller.
45 Overdrive solenoid An open or shorted condition detected in overdrive solenoid circuit.
46+** Charging voltage high Battery voltage sense input above target charging voltage during engine operation.
47+** Charging voltage low Battery voltage sense input below target charging voltage during engine operation.
51** O2 signal below center Oxygen sensor signal indicates lean fuel/air ratio condition during engine operation.
or
Adaptive memory at rich limit Added adaptive memory at rich limit.
52** O2 signal above center Oxygen sensor signal indicates rich fuel/air ratio condition during engine operation.
or
Adaptive memory at lean limit Added adaptive memory at lean limit.
53 Internal controller failure Internal controller fault condition detected.
54 No Sync signal No fuel sync (cam position) signal detected during crankshaft rotation.
62 Controller failure Controller failure
EMR miles not stored EMR miles not stored
63 Controller failure Controller failure
EEPROM write denied EEPROM write denied
55 N/A Completion of fault code display on Check Engine Lamp.
+ Check Engine Lamp On
** Check Engine Lamp On (California only)