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Q: Replaced Crankshaft Synchronizer, crankshaft position sensor, purge valve, and bank 1 o2 sensor

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Replaced Crankshaft Synchronizer, crankshaft position sensor, purge valve, and bank 1 o2 sensor because it was showing the codes for those parts. Check engine light went out and one year later comes back on showing all 3 codes for those exact same parts again at the same time. The engine runs fine it's not like what people describe with having problems with stalling or dying. Literally the only way you can tell something is wrong with the cam position sensor is the check engine light.

My car has 135000 miles.
My car has an automatic transmission.

Hi there. One item that many car owners and even mechanics fail to swap out while changing sensors that trigger OBD-II codes is the wiring harness. More often than not, a loose connection will instantly trigger a code. This is the common problem when the lights and codes appear, but show no symptoms as it’s inconsistent. You might want to be proactive and replace those wiring harnesses to ensure problems don’t pop up when you can least afford them.

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