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Check Engine Light|OBD-II Trouble Codes

2018 FORD F-150 OBD Codes

Real-world fixes and diagnostics from 2018 FORD F-150 owners. Each code page includes owner experiences, common causes, and proven solutions.

2
Codes Reported
12
Discussions
25%
Fix Success Rate

Reported OBD Codes

P0171

How to Fix P0171 Code on Ford F-150

Symptoms: vacuum leak

💬3 discussions✅3 fixed (100% success)Latest: 9/19/2025
P0300

How to Fix P0300 Code on Ford F-150

Symptoms: code, issue, misfire

💬9 discussionsLatest: 7/25/2025
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