F150 CEL Multiple Codes

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Mar 6, 2026 | 12:42 PM

18CoyoteICT

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F150 CEL Multiple Codes

Looking for a little guidance here on where to start -

2018 F150, 5.0L, 10 Speed, 87560 miles, first time ever having CEL in her.

P0300-C Random misfire
P0304:00-E8 Cylinder 4 misfire
P0316:00-6D Misfire on startup
P2601:00-28 Coolant Pump "A" Control Circuit Performance / Stuck Off

Last edited by 18CoyoteICT; Mar 6, 2026 at 12:45 PM.

Mar 6, 2026 | 03:35 PM

laterongc

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Quote:

Originally Posted by 18CoyoteICT

for misfire codes: clear codes, swap coil with #1, make notes of any odd appearances (wet/dirty/worn parts, or different model parts etc). resume driving, scan for codes, does code/misfire change to #1?

if no, repeat whole sequence but swap plug this time?

if no again, repeat but swap injector,

post back with results