Fault code meter

[sharrig]

Hi,

I own a 1982 C3 and the engine warning light comes on whilst driving then goes out after a while. To find the fault I am looking to buy a fault code meter. Any recommendations for around £25.00. Thank you for your help.

 

[teamzr1]

You can get the error codes by using like a paper clip to the DLC port

Turn the ignition to "on" but do not start the car. Make sure the check engine light is on.



Remove the ashtray. Get a paper clip and bend it into a "U" shape.
Insert the paper clip in the slots Jumping pins A and B on the connector. That's the two pins closest to the driver side.
They should be marked A and B.

Once the paper clip is in. The check engine light will flash...pay attention...anyway it will flash once....pause and flash twice faster....that means code 12.

It will flash this code twelve 3 times to signal it's in the check code mode.
Only after that will the stored trouble codes flash. So a code 43 will be 4 flashes followed by a brief pause then three flashes.
The system will flash all trouble codes. Example code 43 then code 21 etc. It will flash code 12 at the end 3 times to signal its done checking.

GM OBD1 Codes​

13	O2 sensor or circuit
14	coolant sensor/high temp
15	coolant temp/low temp
16	system voltage high (3.8L) DIS circuit
17	crank signal circuit ECM fault crank position sensor circuit (3.8L)
18	crank signal circuit ECM fault injector circuit (vin P-5.7L)
19	fuel pump circuit(shorted) crank position sensor(88-91)
20	fuel pump circuit (open)
21	TPS circuit
21/22	grounded WOT circuit
23	MAT circuit IAC sensor (95 models)
24	vehicle speed sensor
22	TPS out of adjustment
25	MAT circuit
26	Quad driver circuit Throttle switch shorted
27	throttle switch open
28	Transmission range pressure switch
31	park/neutral switch cam sensor circuit EGR circuit (88-90) MAP sensor (shorted)
32	BARO sensor circuit(carb models) EGR circuit(injected models) MAP sensor(open)
33	MAP sensor(low vacuum) MAF sensor MAP sensor(voltage high)
34	MAP sensor(voltage low) MAF sensor
35	IAC valve or circuit idle speed control circuit(shorted)
36	MAF sensor DIS system(quad 4) transaxle shift control (3.8L)
37	MAT sensor temp high (3.8L) brake switch(4L60-E trans)
38	brake input circuit MAT sensor temp low(84-86)
39	TCC knock sensor shorted(4.3L)
40	power steering pressure switch
41	faulty ignition module cam sensor (3.8L)
42	EST circuit
43	ESC circuit knock sensor signal
45	O2 sensor(exhaust rich)
46	vehicle anti-theft system
47	air condition clutch and cruise circuit
51	PROM,MEM CAL or ECM problem (3.1L)
52	CALPK or ECM problem (3.1L)
53	system overvoltage EGR system (carb models) alternator out of range
54	fuel pump circuit EGR fault (3.8L)
55	O2 sensor or ECM
56	vacuum sensor Quad drvier B (3.8L)
58	Trans code-TTS temp high
59	Trans code-TTS temp low
61	O2 sensor signal faulty
63	MAP sensor voltage high
64	MAP sensor voltage low RH side O2 sensor lean
65	RH side O2 sensor rich
66	3-2 Control solenoid circuit fault(4L60-E) A/C pressure sensor circuit out of range
67	TCC solenoid circuit (4L60-E)
68	O/D ratio error (4L80-E)
69	TCC stuck on (4L60-E &4L80-E) A/C head pressure switch circuit
72	VSS circuit loss transmission output signal
73	trans pressure control solenoid
74	Trans input speed error (4L80-E)
75	system voltage low
79	Transmission fluid temp high
81	transmission 2-3 error
82	transmission 1-2 error
83	TCC solenoid circuit fault
85	undefined gear ratio
86	low gear ratio error
87	high gear ratio error