OBD1 Codes "How to pull with code list"
For vehicles made after 1996, retrieving the codes of the check engine light in your dash panel is simple. All you need to do is find your diagnostic connector located under the dash by the driver side. You can then hook up a scanner and the codes will be displayed for you. If you don't have any scanner like most drivers, you can bring your vehicle to any local automotive store and they will usually scan the codes FREE for you. However, for vehicles made on or before 1995, there is only one cheap way to get it: You do it yourself!
On board diagnostic (OBD) was designed on vehicles equipped with electronic fuel injection so you can generally retrieve the codes yourself. No need buying a scanner or running to any parts stores to check the engine light. This system is called obd1 and applies to most vehicles made before 1995 for domestics and 1993 on imports. For GM domestic vehicles made before 1995, the diagnostic connector is located under the dash panel by the driver side. To get the check engine codes to flash in your dash panel, use a jumper wire or a paper clip and connect terminals A and B of the diagnostic connector. Turn your ignition key on with engine off and the codes should start to blink. All codes should start with code 12 which is one long flash followed by 2 short flashes. This code 12 means the diagnostic system is normal and will repeat itself continuously if there are no trouble codes. Otherwise, code 12 will flash 3 times before flashing the fault codes. https://www.truckforums.com/forum/pi...&pictureid=690 Below are the OBD DTC's for 1995-previous model year EFI-equipped GM vehicles. DTC - 12 No distributor reference pulse (diagnostic test active) DTC - 13 Oxygen sensor circuit open or no activity DTC - 13 Left bank O2 sensor circuit open or no activity DTC - 14 Engine coolant temp sensor error (high temp indicated) DTC - 15 Engine coolant temp sensor error (low temp indicated) DTC - 16 System voltage too low DTC - 17 Camshaft position sensor error DTC - 21 Throttle Position sensor error (signal high) DTC - 22 Throttle position sensor error (signal low) DTC - 23 Intake air temp sensor error (low temp indicated) DTC - 24 Vehicle speed sensor error (open circuit or no activity) DTC - 25 Intake air temp sensor error (high temp indicated) DTC - 26 Quad Driver Module (QDM A) error DTC - 28 Auto transmission range pressure switch error DTC - 31 Wastegate solenoid circuit error DTC - 31 Gear Position Switch (PRNDL) error DTC - 32 EGR system failure DTC - 33 MAP sensor circuit error (signal high indicating low vacuum) DTC - 34 MAP sensor circuit error (signal low indicating high vacuum) DTC - 35 IAC problem or idle error DTC - 36 MAF sensor error DTC - 36 24x Crankshaft position sensor circuit error DTC - 36 4T60-E Shifting Error DTC - 37 TCC brake switch circuit error DTC - 38 TCC brake switch circuit error DTC - 39 Clutch switch circuit error DTC - 39 TCC error DTC - 41 Ignition control error DTC - 41 MEM-CAL error DTC - 41 C³I Cam Sensor Signal error DTC - 42 Ignition bypass circuit error DTC - 43 Knock sensor error DTC - 44 Oxygen sensor error (lean condition indicated) DTC - 44 Left bank O2 sensor error (lean condition indicated) DTC - 45 Oxygen sensor error (rich condition indicated) DTC - 45 Left bank O2 sensor error (rich condition indicated) DTC - 46 Pass-Key II (VATS) system error - circuit out of freq range DTC - 47 UART (serial data) circuit error DTC - 51 PROM error DTC - 51 Incorrect MEM-CAL DTC - 52 Fuel cal-pak incorrect or missing DTC - 53 System voltage too high DTC - 53 Digital EGR Valve solenoid 1 error DTC - 54 Fuel pump circuit low voltage DTC - 54 Digital EGR Valve solenoid 2 error DTC - 55 ECM error DTC - 55 Digital EGR Valve solenoid 3 error DTC - 56 Quad Driver Module (QDM B) error DTC - 57 Boost Control error DTC - 58 Trans fluid temp sensor circuit error (low voltage) DTC - 58 VATS system error DTC - 59 Trans fluid temp sensor circuit error (high voltage) DTC - 61 A/C system performance DTC - 63 Right bank O2 sensor circuit error DTC - 63 MAP sensor circuit signal voltage high (low vacuum indicated) DTC - 64 Right bank O2 sensor lean exhaust indicated DTC - 64 MAP sensor circuit signal voltage low (high vacuum indicated) DTC - 65 Right bank O2 sensor rich exhaust indicated DTC - 66 A/C pressure sensor circuit error (low pressure indicated) DTC - 67 A/C pressure sensor circuit error DTC - 68 A/C clutch relay circuit error (shorted to ground) DTC - 69 A/C clutch relay circuit error (open circuit indicated) DTC - 69 A/C high pressure switch error DTC - 70 A/C pressure sensor circuit error (high pressure indicated) DTC - 71 A/C evaporator temp sensor circuit error (low temp indicated) DTC - 72 VSS signal circuit error DTC - 73 A/C evaporator temp sensor circuit error (high temp indicated) DTC - 75 Digital EGR solenoid #1 circuit error DTC - 76 Digital EGR solenoid #2 circuit error DTC - 77 Digital EGR solenoid #3 circuit error DTC - 79 Transmission fluid overtemp DTC - 80 Transmission component slipping DTC - 82 3x Crankshaft position sensor circuit error DTC - 85 PROM error DTC - 86 A/D error DTC - 87 EEPROM error (flash memory error) DTC - 90 TCC error DTC - 93 Transmission pressure control solenoid circuit error DTC - 96 Transmission system voltage low DTC - 98 Invalid PCM program DTC - 99 Invalid PCM program I hope the above information helps you GM owners :) |
Nice Post Viper.......you get a sticky........lol
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LOL thanks
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cool post worf
i have one question thow if i am reading this correctly i can pull my codes without a scanner on my 94 but my questions is to you what do you mean by it should start flashing on your dash panel is that in referance to tnew vehical or older then 94 |
Your check engine light will flash. There will be a longer pause between the first and second digit. In other words if it flashes fast 3 times and then there is a longer pause and then it flashes fast 2 times that is a 32 code.
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ok i ge it know never knew thatbefore
thanks shamrock ill be doin that with my truck today seeing what code comes on |
Hey, thanks for the information. This is really going to make troubleshooting easier (hopefully). One question though, this thread as well as the other information on scanning for codes using this method explain that code 12 should come up first, followed by trouble codes, followed by code 12. My sierra is putting out code 32, then code 12. I assume it's still working properly, but should it not be giving me a code 12 first? Could this be a sign of a problem with the ECM?
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error code table: Diagnostic Trouble Code (DTC) Table Free Download
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Originally Posted by hellozaizai
(Post 80230)
error code table: Diagnostic Trouble Code (DTC) Table Free Download
i just looking for it |
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