Acura Service Bulletin: Troubleshooting DTC P1456 and P1457 (1996-2004 Models)

Troubleshooting Procedure

This bulletin provides troubleshooting procedures for DTC P1456 and P1457 on various Acura models from 1996 to 2004.

Procedure A (2001-04 MDX, 1997-05 NSX, 1996-04 RL, and 1999-03 TL)

Check the FTP sensor value, fuel cap, and EVAP system components to identify and repair leaks.

Procedure B (1997-03 CL and 1996-01 Integra)

Similar to Procedure A, but with specific steps for these models.

Important: These procedures should only be performed by skilled technicians with proper tools and training.

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Troubleshooting Procedure