What causes P1177 on a Ford?

Stretched timing chain Failed chain tensioner or guide Failed cam phaser stuck off position Failing cam or crank sensor Incorrect timing after engine work

How do I fix P1177 on a Ford?

Compare cam versus crank correlation PIDs Listen for chain rattle on startup Inspect tensioners and guides if accessible Verify sensor signals independently Retime or replace chain components as needed

P1177 Cam/Crank Synchronization Fault

Q: What does P1177 mean on a Ford?

P1177 — Cam/Crank Synchronization Fault. Applies to F-150, Mustang, Explorer with timing correlation monitoring.

Category: Powertrain - Ignition
Severity: Check Engine Light
Applies to: F-150, Mustang, Explorer with timing correlation monitoring

What does P1177 mean on a Ford?

P1177 — Cam/Crank Synchronization Fault. This Ford-enhanced code applies to F-150, Mustang, Explorer with timing correlation monitoring.

Common causes of P1177

Stretched timing chain
Failed chain tensioner or guide
Failed cam phaser stuck off position
Failing cam or crank sensor
Incorrect timing after engine work

How to fix P1177

Compare cam versus crank correlation PIDs
Listen for chain rattle on startup
Inspect tensioners and guides if accessible
Verify sensor signals independently
Retime or replace chain components as needed