P0017 on a 2022 Ford Explorer
Crank/Cam Correlation (Bank 1 Exhaust)
What does P0017 mean on a 2022 Ford Explorer?
P0017 is the exhaust-cam counterpart of P0016. The ECM compares the crankshaft position signal to the Bank 1 exhaust camshaft position signal and finds them more than a calibrated number of degrees out of alignment. This usually means timing chain stretch, a stuck cam phaser unable to return to base position, or a position sensor producing bad data. P0017 is one of the strongest indicators of timing chain wear on engines with dual VVT.
Symptoms on a 2022 Ford Explorer
- Check Engine Light is illuminated
- Cold-start rattle or chirp from the front timing cover
- Hard cold start with long crank times
- Loss of low-end torque
- Rough idle and reduced throttle response
- Reduced fuel economy
- Possible engine no-start if timing has slipped enough
Likely causes on a 2022 Ford Explorer
- Stretched timing chain or worn timing chain guides Most commonEstimated repair: $800– $3,500
- Stuck exhaust cam phaser cannot return to base timing CommonEstimated repair: $400– $1,500
- Failed exhaust cam position sensor producing inaccurate readings CommonEstimated repair: $100– $400
- Low oil pressure preventing the phaser from holding position OccasionalEstimated repair: $50– $200
- Damaged exhaust cam reluctor wheel or tone ring OccasionalEstimated repair: $300– $1,500
- Stuck-open exhaust VVT oil control valve OccasionalEstimated repair: $100– $450
- Timing chain skipped one tooth after a tensioner failure RareEstimated repair: $1,000– $4,000
How to diagnose this on a 2022 Ford Explorer
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Check oil level and pressure
P0017 with low oil pressure is the exhaust phaser unable to hold commanded position. Confirm level on level ground with a warm engine and measure oil pressure with a mechanical gauge before replacing parts.
Tools: Dipstick, Mechanical oil pressure gauge
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Watch exhaust cam vs. crank position in live data
The cam-crank offset should remain fixed. An offset that drifts as RPM rises indicates timing chain stretch. A static but wrong offset can mean the chain jumped a tooth. Compare to service-manual specifications.
Tools: Scan tool with dual position PIDs
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Listen for chain noise at cold start
A 1–3 second cold-start rattle that quiets as oil pressure builds is early chain wear. Continuous rattle indicates advanced wear with imminent failure risk. Use a mechanic's stethoscope on the front timing cover.
Tools: Mechanic's stethoscope
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Test the exhaust cam sensor electrically
Disconnect the sensor and inspect the connector. With a scope, check the signal pattern — should be a clean square wave with no missing pulses. A noisy or absent signal sets P0017 even with a perfect chain.
Tools: Oscilloscope or scan tool with raw sensor PIDs, Multimeter
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Inspect the cam phaser on engines with documented failures
On Ford 5.4 3V Triton, GM 3.6 LFX/LLT, BMW N20/N26, and VW EA888 engines, the exhaust phaser is a common P0017 cause independent of chain wear. A scope on the cam sensor while bidirectionally commanding the OCV will show whether the phaser is responding.
Tools: Bidirectional scan tool, Oscilloscope (optional)
Common fixes
- Replace timing chain, guides, tensioner, and sprockets as a complete kit
- Replace the exhaust cam phaser / VVT actuator
- Replace the exhaust cam position sensor
- Service or replace the exhaust-side VVT oil control valve
- Address any underlying oil pressure or sludge issue
About the 2020-2024 Ford Explorer
The 2020-2024 Ford Explorer was commonly sold with the following powertrains: 2.3L EcoBoost I4, 3.5L V6, 3.0L EcoBoost V6. Common trims include Base, XLT, Limited, ST, Platinum.
P0017 on chain-stretch-prone engines
P0017 on these engines should be assumed to be a timing chain problem until proven otherwise — they all have documented chain wear issues:
- GM 3.6 LFX / LLT / LF1 — chain stretch around 80–120k miles
- BMW N20 / N26 2.0T — chronic catastrophic chain failure
- VW / Audi EA888 Gen 1 + 2 — chain stretch at 80–100k
- Ford 5.4 3V Triton V8 — combined phaser and chain failure
- Hyundai / Kia Theta II 2.4 — chain and tensioner failure
On these engines, replace the chain as a complete kit (chain, guides, tensioner, sprockets). Half-replacing leads to repeat failure within 30–50k miles.
Why ignoring P0017 risks engine destruction
The progression of timing chain wear on these engines is:
- P0017 sets intermittently — chain has stretched enough to drift
- P0017 sets every drive cycle — wear is consistent
- Chain rattle becomes audible from the cab
- Chain skips a tooth — valves contact pistons on interference engines
- Engine destroyed — bent valves, possibly damaged head and pistons
The repair bill jumps from $1,500–$3,500 (timing job) at step 2 to $4,000–$10,000+ (rebuilt head or new engine) at step 5. P0017 on a known-affected engine should be fixed within weeks.
P0017 vs P0016
- P0016 — Bank 1 intake cam correlation off
- P0017 — Bank 1 exhaust cam correlation off
Both setting together is strong evidence of timing chain wear since the chain affects both cams equally. Just one bank or one cam setting alone is more likely a single phaser or sensor.