P143B 2017 Chevrolet Silverado Code - Reductant Control System Information Signal Message Counter Incorrect

OBDII code P143B indicates that there is an incorrect message counter in the reductant control system information signal, which can affect the vehicle's emissions system performance.

Common symptoms include a check engine light, reduced engine power, and possible issues with the vehicle's emissions system, such as failing emissions tests.

The P143B code can be triggered by issues such as a malfunctioning reductant control module, faulty wiring or connectors, or problems within the exhaust aftertreatment system.

To diagnose the P143B code, use an OBDII scanner to confirm the code, inspect the reductant control module and wiring for damage, and check for other related codes that could provide additional context.

Repairs may include replacing the reductant control module, repairing or replacing damaged wiring or connectors, or cleaning or replacing components of the exhaust aftertreatment system.

While you can drive with the P143B code, it is not advisable as it may lead to reduced engine performance and could worsen the emissions issues, potentially leading to more severe problems.

After completing the necessary repairs, you can clear the P143B code by using an OBDII scanner to erase the code, or by disconnecting the vehicle’s battery for a short period.

Ignoring the P143B code is not safe, as it indicates a problem with the emissions system that could lead to higher emissions, reduced engine performance, and potential damage to other components.

If the P143B code returns after repairs, you should re-evaluate the diagnostic process to ensure all related issues have been addressed and consider seeking professional assistance for further diagnosis.