Test TC-186A: Misfire Adaptive Numerator At Limit

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article.

This trouble code will set if one of the Crankshaft Position (CKP) sensor target windows (40 degrees) has more than 2.86 percent variance from the reference window. Possible causes are: CKP sensor improperly installed, CKP sensor failure, CKP sensor crankshaft target variation, severely worn crankshaft bearings, faulty connections, PCM failure or low compression in one or more cylinders. Go to next step.
Turn ignition off. Disconnect connector at Crankshaft Position (CKP) sensor. Inspect CKP sensor connector for pushed out terminals or damage. Repair CKP sensor connector as necessary. Perform TEST VER-2A . If CKP sensor is okay, go to next step.
Inspect Crankshaft Position (CKP) sensor for proper installation. If CKP sensor is properly installed, go to next step. If CKP sensor is not properly installed, properly install CKP sensor. Perform TEST VER-2A .
Remove CKP sensor. If vehicle is equipped with a 2.0L or 2.4L engine, inspect notches in crankshaft for damage or excessive crankshaft movement. If vehicle is equipped with a 2.5L engine, inspect slots in flexplate for damage or excessive movement of flexplate. Go to next step.
On all engines, if damage or excessive movement of either component is found, repair component failure as necessary. Perform TEST VER-2A . If damage or excessive movement of either component is not found, replace CKP sensor. Perform TEST VER-2A .