Your Gaz 3110 engine control system detects a problem, the computer stores the diagnostic trouble
code B3121 in its memory.
To figure out what is wrong with your vehicle you must first extract the B3121 DTC For Gaz 3110.
On 1999 and later B3121 Gaz 3110 engines, the instrument cluster has a built-in self-diagnostic mode that can be accessed by pressing and holding the instrument cluster SELECT/RESET button. Insert the ignition key and turn to the RUN position (but don't crank or start engine). Continue to press and hold the SELECT/RESET button (for 5 seconds) until the word TEST is displayed by the odometer. Release the SELECT/RESET button within three seconds after the word TEST is displayed to begin the self-diagnostic mode.
B3121 Gaz 3110 DTC Meaning
Body Code - Problem is antilock brake system, electronic suspension and steering systems.
SAE - Generic
Fuel And Air Metering
Cruise Control Servo Indicates Low
PCM Stack Overrun
The B3121 Gaz 3110 Check Engine lamp is perhaps the most troubling of lights because it could mean so many different things, from you didn't screw the gas cap on tightly enough to look out for pistons flying through the hood and into the stratosphere. The easiest way to find out what this light is telling you is to hook your vehicle up to a scan tool. B3121 diagnostic tool looks a little like an oversized calculator and plugs into a communication port inside the car. After you instruct it to perform the scan, it speaks B3121 DTC For Gaz 3110 with your car's computers to find out exactly what's prompting the light to turn on.