B21A1 JEEP – ECU Reset/Recovery Occurred

B21A1 JEEP Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

B21A1 JEEP Possible Causes

Module Was Reset,Module Was Re-Flashed

B21A1 JEEP Description

Whenever the module detects a power on reset or a re-flash, this code will set. This code is for information only. No repair is necessary.