what does code c109d mean?

Question

in a 2013 for f150, what does code c109d mean?

Answer 1

Don't have the information about the 2013 model year, but here is some information about the 2010:

C109D Low vacuum condition.

Your best solution is to find 109d the low vacuum concern, the 109E is vacuum loss at the brake booster, this comes on due to low vacuum, Which is needed for ABS operation.Check your vacuum hoses for vacuum loss you also have vacuum port so you need to inspect that for vacuum loss also you need to check the brake booster including the brake booster check valve, you need a vacuum gauge to carryout the test, should read 15-22 In-Hg

Read more: https://www.autocodes.com/qa/12336/have-code-c109e-and-c109d-on-2010-f-150