2011 supercrew, 77k miles - been getting a constant "check brake system" message for quite a while now. Here's what I know - I've changed front hubs, front wheel speed sensors and IWE's , all vacuum lines from booster to IWEs - including solenoid that controls them. I've smoke tested all that as...
Interesting - I pulled the codes - I'm getting a code for mass air, and U0401 , which is "invalid data from ECM/PCM" I'll go out and pull the plugs and see what I find. Thanks.
I'm having the same issue - BUT - my truck starts acting like it's misfiring and will die repeatedly... especially if it's wet out. I know it has at least one bad front wheel speed sensor. But I'm wondering why it is misfiring and stalling.. haven't seen that issue in anything I've read here. An...
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