Having problems with your 2003 Toyota Highlander ?

Check engine light came on - 2003 Toyota Highlander

Posted / edited by AnonymousUser on : 15-01-2018

Answers :

This is usually triggered by an emissions problem detected by the cars computer, but can be something else. You need to check what engine codes are stored in the cars computer to figure out what is wrong. Although the Toyota may run fine, continuing to drive it w/out fixing the problem could result in other problems, so have it checked soon. Most parts stores offer free check engine light code retrieval. They will plug a hand held scan tool into the cars diagnostic port, and 'read' any codes stored on the cars computer. They will tell you the code #(s), and suggest ways to fix the problem. If you have further questions at that time, post them and the code #'s at this site. Good luck
Repair Help & Product Troubleshooting for 2003 Toyota Highlander

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My check engine light came on the day after I had my car smog checked. My Tech noted error codes po136, po174, po303 and po305, It's a 2002 Highlander with only13,660 miles on it. Toyota had it for a week and couldn't resolve the problem. They reset the check engine light and told me to keep driving it. The light came back on after 7 days. Any suggestions?

The po303 and p0305 codes are indicating a cylinder 3 & 5 MISFIRE respectively. the other codes are for o2 sensor and fuel trim. the misfire codes should be fixed first and then worry about the others if they still exist. if the vehicle has direc ... 2002 Toyota Highlander

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Check engine light came on - 2003 Toyota Highlander

This is usually triggered by an emissions problem detected by the cars computer, but can be something else. You need to check what engine codes are stored in the cars computer to figure out what is wrong. Although the Toyota may run fine, continuin ... 2003 Toyota Highlander

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Can you get me some specific code numbers? ... 2002 Toyota Highlander

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... 2004 Toyota Highlander

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