trn the key 3 times and the check engine light flashes engine codes. On my '88 Dakota I went to AutoZone and they gave me a book that told what they ment. With my '95&1/2 Rio Grande 4 cyclinder they can't tell me. Only have codes for the v-6. The dealer can't or won't tell me either. They want to make that 60$ to put it on their computer. Please help. If you know what they mean I could really use a copy.

If nobody here can come up with the list, go to a different dealer. Tell the service manager "Those *!#@ at XXX stealership don't want my business - they won't give me the codes . . . " Maybe you can break them loose.

You might also try a different Auto Zone, an O'Reilly, a Conquest, a NAPA . . .

This site might be of help: http://www.troublecodes.net/GM/

Try on here.
chilton

All codes should be generic or have about the same meaning.

I work at a shop that has the Mitchell software which gives the trouble codes list. I'll list it below.

But before I do I would like to preach a little; don't be so quick to criticize shops charging to hook up to the computer. $60 does sound like alot (we charge $45), but if you worked there all day long, and got as many requests to hook up to the "magic computer that will fix the car automatically", you would see the frustration it causes. Not a day goes by that we don't have 2 or 3 people come in to find out why their MIL light is on, and they expect you to drop what you're doing (a paying job I might add), get the $2000 Snap-on scan tool, hook it up, and tell them what they need to do to fix the problem. Scan tools are a good starting point, but do not magically repair the problem when the DTC is cleared, as most people think. Okay, I'll get off the pulpit now and give you the codes list. I'm just a little touchy when it comes to using the scan tools. Hope they help!

DTC 11 - NO CRANK REFERENCE AT PCM - no crankshaft reference signal picked up during cranking - MIL may not come on

DTC 12 - BATTERY DISCONNECT - battery power to the PCM was disconnected within the last 51 key-on cycles - MIL may not come on

DTC 13 - NO CHANGE IN MAP FROM START TO RUN - no difference recognized between engine Manifold Absolute Pressure (MAP) reading and barometric (atmospheric) pressure reading at start up - MIL will come on

DTC 14 - MAP VOLTAGE TOO LOW - MAP sensor input less than minimum accepted voltage - MIL will come on

DTC 14 - MAP VOLTAGE TOO LOW - MAP sensor input more than maximum accepted voltage - MIL will come on

DTC 15 - NO VEHICLE SPEED SENSOR - no VSS signal detected with road load conditions - MIL will come on

DTC 17 - ENGINE IS COLD TOO LONG - coolant temperature stays less than normal operating temperature during vehicle operation - MIL may not come on

DTC 21 - O2S SENSOR STAYS AT CENTER - no rich or lean signal detected from oxygen sensor output - MIL will come on

DTC 21 - O2S SHORTED TO VOLTAGE - oxygen sensor input voltage maintained at more than operating range - MIL will come on

DTC 22 - ECT SENSOR VOLTAGE TOO LOW - engine coolant temperature sensor input less than minimum accepted voltage - MIL will come on

DTC 22 - ECT SENSOR VOLTAGE TOO HIGH - engine coolant temperature sensor input more than maximum accepted voltage - MIL will come on

DTC 23 - INTAKE AIR TEMPERATURE SENSOR VOLTAGE TOO LOW - IAT sensor input less than minimum accepted voltage - MIL will come on

DTC 23 - INTAKE AIR TEMPERATURE SENSOR VOLTAGE HIGH - IAT sensor input more than maximum accepted voltage - MIL will come on

DTC 24 - THROTTLE POSITION SENSOR VOLTAGE LOW - TPS input less than minimum accepted voltage - MIL will come on

DTC 24 - THOTTLE POSITION SENSOR VOLTAGE HIGH - TPS input more than maximum accepted voltage - MIL will come on

DTC 25 - IDLE AIR CONTROL MOTOR CIRCUITS - shorted condition detected in one or more IAC motor circuits - MIL will come on

DTC 27 - INJECTOR #1-6 CONTROL CIRCUIT - injector output driver does not respond properly to Powertrain Control Module control signal - MIL may not come on

DTC 33 - A/C CLUTCH RELAY CIRCUIT - open or shorted condition detected in a/c clutch relay circuit - MIL may not come on

DTC 34 - SPEED CONTROL SOLENOID CIRCUIT - open or shorted condition detected in speed control vacuum or vent solenoid circuits - MIL may not come on

DTC 34 - SPEED CONTROL SWITCH ALWAYS LOW - speed control switch input less than minimum accepted voltage - MIL may not come on

DTC 34 - SPEED CONTROL SWITCH ALWAYS HIGH - speed control switch input more than maximum accepted voltage - MIL may not come on

DTC 41 - GENERATOR FIELD NOT SWITCHING PROPERLY - open or shorted condition detected in alternator field circuit - MIL will come on

DTC 42 - AUTO SHUTDOWN RELAY CONTROL CIRCUIT - open or shorted condition detected in ASD circuit - MIL may not come on

DTC 44 - BATTERY TEMP SENSOR VOLTS OUT OF LIMIT - open or short exists in Engine Coolant Temperature circuit or a problem exists in PCM battery temperature voltage circuit - MIL may not come on

DTC 46 - CHARGING SYSTEM VOLTAGE TOO HIGH - battery voltage sense input more than target charging voltage during engine operation - MIL will come on

DTC 47 - CHARGING SYSTEM VOLTAGE TOO LOW - battery voltage sense input less than target charging voltage during engine operation and no change is detected in battery voltage during active test of alternator output - MIL will come on

DTC 51 - O2S SENSOR STAYS BELOW CENTER (LEAN) - oxygen sensor indicates lean air/fuel ratio during engine operation - MIL will come on

DTC 52 - O2S SENSOR STAYS ABOVE CENTER (RICH) - oxygen sensor indicates rich air/fuel ratio during engine operation - MIL will come on

DTC 53 - INTERNAL PCM FAILURE - PCM detects internal failure - MIL may not come on

DTC 53 - PCM FAILURE SRI COMMUNICATION - PCM detects internal failure regarding service reminder indicator (SRI) - MIL may not come on

DTC 54 - NO CAM SYNC SIGNAL AT PCM - no Camshaft Postion (CMP) sensor fuel sync signal detected during engine cranking - MIL may not come on

DTC 55 - completion of DTC display by MIL light

DTC 62 - PCM FAILURE SRI MIL NOT STORED - unsuccessful attempt to update SRI miles in PCM EEPROM - MIL may not come on

DTC 63 - PCM FAILURE EEPROM WRITE DENIED - unsuccessful attempt to write to EEPROM location by PCM - MIL may not come on



Good Luck!

Greg J.