How to check trouble codes on a 1994 GM?
Checking trouble codes from your 1994 GM vehicle does not require the use of special equipment, such as a scan tool. Extracting trouble codes from your vehicle lets you track down and diagnose faulty components in an expedited manner. The computer uses the “Check Engine” light located on your dashboard to display the stored trouble codes.
How to read code without scan tool on 1994 GM?
Insert the pointed ends into the furthest two top-right diagnostic connector terminals. After bridging the two top right terminal connections on the diagnostic connector, switch the ignition to the “ON” position. Watch the “Check Engine” light on your dashboard. It should flash once, pause, and flash two more times in succession.
How many times does a GM trouble code flash?
Write down the sequence of flashes displayed from the “Check Engine” light after the initial “one flash, pause, two-flash” code appears three times. The remaining trouble codes will flash a total of three times before displaying the next set of trouble codes.
Which is the diagnostic code for a GMC check engine light?
1 Refer to our Generic OBD II code list for definitions on all other GMC diagnostic trouble codes. 2 Manufacturer Specific Codes 3 P1031 4 P1032 5 P1105 6 P1106 7 P1107 8 P1108 9 P1109 10 P1111
What should I do if my Chevy 350 engine is not running?
Check for a fuel problem by spraying carburetor cleaner into the carburetor. Start the vehicle. If the vehicle starts, there is a fuel problem. If you have a mechanical fuel pump and the lines are not clogged, replace the mechanical pump. If you have an electric fuel pump, check the relay. If the relay is bad, replace it.
Why is my GM code not working on my car?
Engine cranking, then with the engine running, the PCM detected that it did not receive a Starter signal at terminal C1 -11. Engine cranking, then the PCM determined that it did not receive the correct frequency code from the Theft Deterrent Module.
What to do if your GM pick up has no start?
One of the most overlooked areas, when testing a hard to diagnose no-start, is the mechanical condition of your 4.3L, 5.0L, 5.7L GM pick up, van or SUV. Checking the engine mechanical condition means an engine compression test.
Can a bad ignition module cause an engine to run rough?
Engine is misfiring or running rough: An engine misfire results from incomplete combustion. A faulty ignition module can affect ignition timing, resulting in an engine that misfires and runs rough. The engine may also run well at low speed, but won’t accelerate well. 3.