P1870 :(

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#11

10-23-2013, 03:27 PM

bryanbc

Starting Member

Join Date: Jan 2013

Location: Georgia

Posts: 121

Quote:

Originally Posted by Captain Hook

The longer you wait, the more it's costing you in fuel!

How so. Ive had the same MPG since it started to happen

#12

10-23-2013, 03:38 PM

Captain Hook

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Join Date: Mar 2009

Location: Belleville, Michigan

Posts: 8,453

The purpose of overdrive is to decrease engine RPM at cruising speeds to save fuel. Depending on engine load, it usually shifts into OD around 40 MPH. When the trans is in OD, the final drive ratio is nearly 1:1 unless the torque converter is not fully locked up. P1870 is telling you that it's not fully locked up when it should be.