DIAGNOSTIC CODES
2015 Ford Explorer P0016 & P0017 Timing Codes
Understand crankshaft/camshaft correlation faults and why oil, VCT and mechanical timing checks matter.
Confirm the vehicle's engine, trim, drivetrain, market and equipment. The exact procedure may differ, even within the same model year.
What the two codes indicate
P0016 and P0017 describe a mismatch between expected crankshaft and camshaft position relationships. On a 2015 Explorer, the affected bank and sensor must be established using Ford diagnostic data for the installed engine. A code definition alone does not identify a slipped timing chain.
Symptoms owners may notice
Possible symptoms include an illuminated check-engine light, rough running, difficult starting, reduced performance and other VCT-related trouble codes. Some vehicles initially show only a stored code. If the engine makes unusual mechanical noise, runs very poorly or shows oil-pressure warnings, avoid continued operation.
Check oil and related codes first
Verify the oil level, correct oil specification and service history. Variable camshaft timing uses controlled oil flow, so dirty oil, supply problems, wiring faults and a sticking VCT solenoid may affect control. Record freeze-frame data and all related DTCs before clearing anything.
Ford service information matters
Ford service message SSM 49821 addresses certain 2015–2021 Ford/Lincoln vehicles displaying VCT trouble codes including P0016 and P0017. It directs technicians to a Ford pinpoint test that can cycle the relevant VCT solenoid before component replacement. Applicability and exact test steps must be confirmed for the vehicle.
When mechanical timing is suspected
If commanded cam timing, sensor signals and oil/VCT checks do not explain the code, a trained technician may need to examine timing correlation, components and engine mechanical condition. Mechanical timing work is not a casual driveway task; incorrect reassembly can cause severe engine damage.
Avoid common diagnostic shortcuts
Do not assume a cam sensor, crank sensor, timing chain or water pump must be replaced solely because P0016/P0017 appeared. A proper test distinguishes electrical signal faults, commanded VCT movement and mechanical synchronization. Parts replacement without identifying the fault can become expensive.
Confirm the fix
Document the original codes, oil condition, electrical tests and repairs. After correction, monitor live timing data and confirm that the codes do not recur under the appropriate driving conditions. Return promptly if oil pressure drops, the engine rattles or a warning light flashes.
Do not drive through a mechanical warning
An illuminated check-engine light with otherwise normal operation needs diagnosis, but severe chain rattle, rough running, an oil-pressure warning or sudden loss of power warrants stopping safely. A timing correlation fault combined with mechanical noise may be more serious than an intermittent sensor signal.
What to capture for a diagnostic appointment
Write down the mileage, oil change history, whether the symptom occurs at cold start or after warming up, and any recent repairs. Ask the shop to record commanded versus actual camshaft timing, related trouble codes and the pinpoint tests used. This documentation helps prevent unnecessary replacement of expensive timing components.
Oil condition can complicate timing diagnosis
Variable cam timing relies on suitable oil and proper control, so document the oil grade, service history and any oil-pressure symptoms before assuming a mechanical timing failure. Compare the scan-tool data and any additional VCT codes with Ford diagnostics. Do not continue operating an engine that has serious rattling or loss of oil pressure.
Use the correct model-year manual and current service information. Stop if instructions or safety precautions are unclear, and use a qualified technician for work you cannot verify.
References and further reading
This independent guide is not endorsed by the vehicle manufacturer. Let us know if you spot an error.