hello i recently bought a 2008 ds450 and have discovered that the coolant temp sensor is bad so the fan will not come on, and i worry the computer isnt getting the right signal. i jumped the connector that plugs into the sensor and the fan came on but so did the check engine light. is there a after market replacement that could be had at a local parts store ( napa autozone etc ) only oem one i could find would not be here in time for the camping trip we had planned. any help would be greatly appreciated