what items are needed to service an engine, when "service engine soon" lights come on. this is 2004 sentra 1.8S.

Asked by Sep 27, 2013 at 04:13 AM about the 2004 Nissan Sentra 1.8 S

Question type: Maintenance & Repair

Light engine lights came on saying "service engine soon". Apart from the regular tune-up and transmission service, what is needed to be done for a 140K miles car?

2 Answers


service engine soon lights mean that the PCM has detected a fault and needs to be corrected. Just like a Check engine light. And at a 140K the coolant should be changed as well as spark plugs, pcv valve, and air filter. Serpentine belt and tensioner should also be addressed. Since you have a timing chain no internal engine maintenance is needed.

11 of 11 people found this helpful.

Like Chris said, the service engine soon light comes up when the ECU detects a fault that must be corrected. The best way to know what's up is to use an OBD2 scanner which will pull up a code that will direct you to what's going on. As for a 140K service Chris pretty much summed it up....

9 of 9 people found this helpful.

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