Check Engine Light|OBD-II Trouble Codes
2020 FORD F-150 OBD Codes
Real-world fixes and diagnostics from 2020 FORD F-150 owners. Each code page includes owner experiences, common causes, and proven solutions.
4
Codes Reported
29
Discussions
38%
Fix Success Rate
Reported OBD Codes
P0303
How to Fix P0303 Code on Ford F-150
Symptoms: misfire, p0303 misfire code, rough idle
💬10 discussions✅9 fixed (90% success)Latest: 12/20/2025
P0420
P0420 on 2020 FORD F-150
Symptoms: issue, evap. leak, dry rotted
💬10 discussions✅1 fixed (10% success)Latest: 7/28/2025
P0300
How to Fix P0300 Code on Ford F-150
Symptoms: check engine light, vacuum leak, misfire
💬5 discussions✅1 fixed (20% success)Latest: 12/2/2025
P0430
P0430 on 2020 FORD F-150
Symptoms: cel, check engine light, placebo
💬4 discussionsLatest: 1/18/2026