Inspect the secondary air injection-(SAI) checkvalve for the following:Damage to the SAI check valve feed pipefitting-(1)Damage to the SAI check valve mounting boltholes-(2)Damage to the SAI check valve gasket sealingsurface-(3)Damage to the SAI check valve inletport-(4)Replace the SAI check valve as necessary.
Crankshaft Position System Variation Learn Engine Block Cylinder Block Crankshaft
Note:The Crankshaft Position System Variation Learn procedure is also required when thefollowing service procedures have been performed, regardless of whether DTC-P0315is set:An engine replacementA engine control module (ECM) or body control module (BCM) replacementA crankshaft balancer replacementA ...