Here's why:
* Timing: The engine relies on precise timing between the crankshaft and camshaft. The sensors tell the Engine Control Module (ECM) the position of each. If they're out of sync, the ECM can't accurately determine the piston and valve timing, leading to misfires, rough running, or a complete inability to start.
* Causes of Misalignment: Several factors can cause the CMP and CKP to be out of sync:
* Timing belt/chain failure or slippage: This is a major culprit. A broken or slipped timing belt/chain will severely misalign the camshaft and crankshaft.
* Damaged or worn sensors: A faulty CMP or CKP will provide inaccurate information to the ECM.
* Sensor wiring problems: Damaged or shorted wiring to either sensor can also cause the signals to be incorrect or absent.
* ECM malfunction: Though less common, a faulty ECM itself could misinterpret the signals from the sensors.
* Symptoms: Out-of-sync sensors manifest in various ways:
* No start: The engine cranks but won't fire.
* Rough running/misfires: The engine runs poorly, stalls easily, or has a rough idle.
* Check engine light: Illuminates with various codes related to camshaft or crankshaft position sensor issues (P0340, P0341, P0344, P0345, P0335, P0336, etc.).
In short: If you suspect a problem with your 2002 Dodge Intrepid 3.5L, check both the CMP and CKP sensors and their wiring. A proper diagnostic scan with an OBD-II code reader is the first step. If the codes point to sensor problems or timing issues, a mechanic should diagnose the root cause. Ignoring this problem could lead to serious engine damage.
