<p>This paper presents an adaptive backstepping control method for nonlinear systems with uncertain output faults and asymmetric full-state constraints. The dual-channel event-triggered mechanism for observed output and control input is proposed to address output sensor faults. The observation output triggered mechanism samples the faulty output signal and constructs a state observer to estimate unknown states. Its trigger moments are incorporated into the control input triggered mechanism, forming a dual-dynamic-variables event-triggered mechanism. Additionally, to keep system states within constraint limits, a piecewise barrier Lyapunov function is designed. The feasibility of this control method is verified to guarantee the boundedness of the closed-loop signals and the convergence of the tracking error by using Lyapunov stability theory. Finally, two simulation examples are provided to verify the effectiveness of the proposed scheme.</p>