Checking For Trouble Codes

NOTE: For circuit and connector terminal identification, see CONNECTOR IDENTIFICATION. For wiring diagrams, see WIRING DIAGRAMS - 2.5L FLEXIBLE FUEL article.

Battery must be fully charged before proceeding. Attempt to start engine. If engine will not start, crank engine for at least 10 seconds. Connect scan tool to engine diagnostic connector. Record scan tool trouble codes.
If scan tool has a blank screen or displays RAM TEST FAILURE, CARTRIDGE ERROR, KEY PAD TEST FAILURE, LOW BATTERY or HIGH BATTERY, this indicates a scan tool failure. To diagnose and correct these conditions, see TESTS W/CODES - BODY CONTROL COMPUTER article in ENGINE PERFORMANCE.
If scan tool displays NO RESPONSE, go to TEST NS-6A. If trouble codes are displayed, see TROUBLE CODES table. If no trouble codes are displayed and a driveability problem is present, go to TEST NTC-1A. If no trouble codes are displayed and a no-start problem is present, go to TEST NS-1A.

TROUBLE CODES

MIL Code ⁽¹⁾

SCAN TOOL MESSAGE

Test No.

Code 11

NO CRANK REFERENCE SIGNAL AT PCM

TC-2A

Code 54

NO CAM SYNC SIGNAL AT PCM

TC-3A

Code 14

MAP SENSOR VOLTAGE TOO LOW

TC-4A

Code 14

MAP SENSOR VOLTAGE TOO HIGH

TC-5A

Code 13

NO CHANGE IN MAP FROM START TO RUN

TC-6A

Code 13

SLOW CHANGE IN IDLE MAP SENSOR SIGNAL

TC-6A

Code 21

O2S STAYS AT CENTER

TC-7A

Code 52

O2S STAYS ABOVE CENTER (RICH)

TC-8A

Code 51

O2S STAYS BELOW CENTER (LEAN)

TC-9A

Code 21

O2S SHORTED TO VOLTAGE

TC-10A

Code 15

NO VEHICLE SPEED SENSOR SIGNAL

TC-11A

Code 25

IDLE AIR CONTROL MOTOR CIRCUITS

TC-12A

Code 27

INJECTOR CONTROL CIRCUIT

TC-13A

Code 32

EGR SYSTEM FAILURE

TC-17A

Code 32

EGR SOLENOID CIRCUIT

TC-18A

Code 31

EVAP PURGE SOLENOID CIRCUIT

TC-19A

Code 37

TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT

TC-20A

Code 24

THROTTLE POSITION SENSOR VOLTAGE LOW

TC-21A

Code 24

THROTTLE POSITION SENSOR VOLTAGE HIGH

TC-22A

Code 23

THROTTLE BODY TEMP SENSOR VOLTAGE LOW

TC-23A

Code 23

THROTTLE BODY TEMP SENSOR VOLTAGE HIGH

TC-24A

Code 22

ECT SENSOR VOLTAGE TOO LOW

TC-25A

Code 22

ECT SENSOR VOLTAGE TOO HIGH

TC-26A

Code 42

NO ASD RELAY OUTPUT VOLTAGE AT PCM

TC-27A

Code 42

AUTO SHUTDOWN RELAY CONTROL CIRCUIT

TC-28A

Code 35

RAD FAN CONTROL RELAY CIRCUIT

TC-29A

Code 35

LOW SPEED FAN CONTROL RELAY CIRCUIT

TC-30A

Code 35

HIGH SPEED FAN CTRL RELAY CIRCUIT

TC-31A

Code 33

A/C CLUTCH RELAY CIRCUIT

TC-32A

Code 62

PCM FAILURE SRI MILE NOT STORED

TC-36A

Code 63

PCM FAILURE EEPROM WRITE DENIED

TC-36A

Code 44

BATTERY TEMP SENSOR VOLTS OUT OF LIMIT

TC-37A

Code 12 ⁽²⁾

BATTERY DISCONNECT

Code 55 ⁽³⁾

Code 47

CHARGING SYSTEM VOLTAGE TOO LOW

⁽⁴⁾

Code 46

CHARGING SYSTEM VOLTAGE TOO HIGH

⁽⁴⁾

Code 41

GENERATOR FIELD NOT SWITCHING PROPERLY

⁽⁴⁾

Code 34

SPEED CONTROL SOLENOID CIRCUITS

⁽⁵⁾

Code 17

ENGINE IS COLD TOO LONG

⁽⁶⁾

Code 53

INTERNAL PCM FAILURE

⁽⁷⁾

Code 53

PCM FAILURE SPI COMMUNICATIONS

⁽⁷⁾

⁽¹⁾	Malfunction Indicator Light (MIL) (Check Engine light).

⁽²⁾	Battery input to PCM was disconnected within the last 50 key-on cycles.

⁽³⁾	Completion of trouble code display.

⁽⁴⁾	Refer to appropriate ALTERNATORS & REGULATORS article in STARTING & CHARGING SYSTEMS.

⁽⁵⁾	Refer to appropriate CRUISE CONTROL SYSTEMS article in ACCESSORIES & EQUIPMENT.

⁽⁶⁾	If engine temperature does not reach 176°F (80°C) after driving 20 minutes, check cooling system. This code may set in error during very cold slow speed driving.

⁽⁷⁾	- Replace PCM and perform TEST VER-2.