U300B OBD-II: Ignition Input Accessory/On/Start

U300B Severity

Moderate

Will U300B go away on its own?

Once the vehicle's onboard system no longer detects the issue, most codes will disappear on their own. If your vehicle still has this code, however, it should be properly diagnosed to avoid a more serious problem.

For a proper diagnosis, RepairPal Certified shops have the equipment, tools, and expertise.

Moderate severity codes might not threaten the vehicle's safety or functionality immediately, but you should still get it diagnosed within a reasonable time frame to keep your car running well.

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OBD II Fault Code

  • OBD II U300B

OBD-II Code Ignition Input Accessory/On/Start is defined as a Ignition Input Accessory/On/Start

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