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Ask Juan Crespo Your Own Question
Juan Crespo
Juan Crespo, Tech Trainer
Category: Mitsubishi
Satisfied Customers: 1525
Experience:  A.S.E. Master Technician, Advanced Level, Emissions - Asian, Domestic, & European
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Mitsubishi Galant ES: 2000 galant 2.4l trouble code p0170 fuel

Customer Question

2000 galant 2.4l trouble code p0170 fuel trim Bank 1
Submitted: 1 year ago.
Category: Mitsubishi
Expert:  Juan Crespo replied 1 year ago.
Hi there.Code P0170 sets when the fuel trim stays too large or too small for more than 5 seconds. Possible causes are exhaust system leaks, intake vacuum leaks or faulty mass air flow sensor (MAF).If there are no leaks, erase the codes; then remove and thoroughly clean the MAF with an appropriate cleaner (click here to see example). Make sure the air filter is clean. Reinstall the MAF and drive the vehicle. If code returns, replace the MAF sensor (click here for example).Please let me know if you have any other questions.Best Regards.
Expert:  Juan Crespo replied 1 year ago.
Hi again.Just checking to see if the information I provided helped you solve your issue. If it did, then kindly accept and rate my answer now. Please reply if it didn't.Best Regards.