Question about 2003 Dodge Durango

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Durango has engine light on and code P0301 on scanner. not running rough, but check engine light is on. Its the 4.7 V8. I checked spark plug and it appears to have spark although its orange not blue. I checked the one ajacent and its the same color. when I took plug out it was light brown/ grey in color and dry. Injector? what else could it be?

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Check for a leak in the EVAP system. Also, check the gas cap. I know it sounds a bit rediculous, but it could be as simple as replacing the gas cap. Hope this helps

Posted on Mar 23, 2011

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Posted on Jan 02, 2017

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In my 2002 dodge durango myh check engine light is on and I took it to auto zone to have them check the engine codes. Upon the completion of the test I got 4 engine codes P300 P301 P302 and P0442. The...


Do you know how to test electrical circuits ? Is the PCM - engine computer controlling the coils ? Test with a test light ! One side has B+ voltage the dark green with orange stripe wire ,the other goes to the PCM , which will suppy a ground when triggered . You can test this with a test light . or you can buy a noid light at the parts store . If you replaced the coil an spark plug an that code comes back ,could have a burnt driver inside the computer , test it first !
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The "check engine" light will "light" when there is a malfunction in the engine management system. The fault code is then stored in the computer. The computer must be scanned to retrieve these stored faults to pinpoint the malfunctioning component. We recommend buying your own scanner and doing it yourself. With a pocket scanner you can check for fault codes to find out why the light came on in the first place. You can clear your cars trouble codes after you replace the malfunctioning sensors.

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