What does GM code 12 no distributor pulses mean?
GM Code 12 No Distributor Pulses. Trouble Code 12 is a special case code that is not logged into the ECM’s Non-Volatile Memory (NVM) when detected. When the ignition is ON and the ECM detects no ignition reference pulses coming from the ignition module, it illuminates the Service Engine Soon lamp.
What does trouble code 12 mean on an ECM?
Trouble Code 12 is a special case code that is not logged into the ECM’s Non-Volatile Memory (NVM) when detected. When the ignition is ON and the ECM detects no ignition reference pulses coming from the ignition module, it illuminates the Service Engine Soon lamp.
How to run a diagnostic test on a 1993 Chevy truck?
They will be on the end of the row to the far right, and the will be side by side. Place your key into the Chevy’s ignition and turn it, but don’t crank the engine. Watch the “check engine” light. It will start flashing. Chevy trouble codes are two digits. The first digit will be represented by a long flash.
What is trouble code 12 on a GM car?
Trouble Code 12 is a special case code that is not logged into the ECM’s Non-Volatile Memory (NVM) when detected. When the ignition is ON and the ECMdetects no ignition reference pulses coming from the ignition module, it illuminates the Service Engine Soon lamp.
What does the ABS warning light on a Mazda mean?
Should this happen, consult an expert repairer, we recommend an Authorised Mazda Repairer as soon as possible. When the engine is jump-started to charge the battery, uneven rpm occurs and the ABS warning light may illuminate. If this occurs, it is the result of the weak battery and does not indicate an ABS malfunction. Recharge the battery.
What does the Check Engine light on a Mazda 3 mean?
When the check engine light comes on, a fault code is stored in the ECU. Diagnostic equipment is required to read the fault codes. Description: The Mazda 3 i-stop is an engine start/stop system that turns off the engine when the vehicle becomes stationary to save fuel.
What to do if a Mazda message turns off?
If the message is displayed, stop the vehicle in a safe place and do not operate the steering wheel. There is no problem if the message in the display turns off after a while. Contact an expert repairer, we recommend an Authorised Mazda Repairer if the message is displayed continuously.