P0017 on 2008-2019 Ford Taurus 3.5L: Crank-Cam Correlation Causes and Fixes

What's Unique About the 2008-2019 Ford Taurus

The 3.5L Duratec V6 (part of Ford's Cyclone engine family) in this generation of Taurus has a critical design characteristic: the water pump is located inside the engine and is driven by the timing chain. When the water pump seal fails, it leaks coolant directly into the engine oil. This contaminated, milky oil loses its lubricating properties, rapidly accelerating wear on the timing chain, guides, and tensioners, which is a primary cause for the P0017 code on this specific platform. This repair is labor-intensive as the timing cover must be removed for access.

Generation note: This guide covers the fifth-generation (2008-2009) and sixth-generation (2010-2019) Ford Taurus with the 3.5L Duratec V6. The underlying engine architecture and the critical internal water pump design are consistent across these years, making the causes and fixes for P0017 largely the same. This issue is also common on platform mates like the Ford Flex, Edge, and Lincoln MKX/MKS with the same engine.

Symptoms You May Notice

• Check Engine Light is on
• Rough or uneven idle
• Reduced engine power and hesitation during acceleration
• Engine may stall at low speeds
• Rattling noise from the engine, especially on a cold startup
• Decreased fuel economy

Most Likely Causes

1. Stretched Timing Chain / Failing Internal Water Pump 🔴 High Probability The internal water pump is a known failure point. When it leaks coolant into the oil, it compromises lubrication and causes the timing chain to stretch and guides to fail. Some owners report failure around 100,000-125,000 miles.
   How to confirm: Listen for a rattling noise on cold startups. 🎬 See what a stretched timing chain rattle sounds like on startup. A definitive diagnosis requires removing the timing cover to physically inspect the chain for slack and check the tensioner's position. Coolant in the oil (milky appearance) is a tell-tale sign of water pump failure.
   Typical fix: Replace the timing chain, tensioners, guides, and phasers. It is mandatory to replace the water pump at the same time. Using the correct Motorcraft Yellow coolant may help prolong the life of the new pump.
   Est. part cost: $400-$800 for a complete kit
2. Low or Dirty Engine Oil 🟡 Medium Probability The VCT system uses oil pressure to adjust cam timing. If the oil is low, old, or contaminated (e.g., with coolant from a failing water pump), the VCT solenoids and phasers cannot operate correctly. This should always be the first check.
   How to confirm: Check the oil level on the dipstick and inspect its condition. If it appears milky, it is contaminated with coolant. If it's simply low or very dark, it's overdue for a change.
   Typical fix: Perform an oil and filter change using the manufacturer-specified grade of oil. This is the first and cheapest diagnostic step.
   Est. part cost: $40-$70
3. Sticking or Failed VCT Solenoid 🟡 Medium Probability Oil sludge and debris can clog the small passages in the VCT solenoid (also called an Oil Control Valve or OCV), causing it to stick. Ford has issued TSBs (e.g., SSM 48423, TSB 16-0093) acknowledging this issue, sometimes even on low-mileage vehicles.
   How to confirm: Use a scan tool to command the Bank 1 exhaust solenoid to activate; listen for a click and watch for a change in engine idle. The solenoid can also be removed, cleaned, and tested with a 12V source. A common diagnostic step is to swap the exhaust solenoid with the intake solenoid on the same bank and see if the code changes to P0016.
   Typical fix: Replace the Bank 1 exhaust VCT solenoid. It is located on the rear valve cover. The part number has been superseded multiple times, with 7T4Z-6M280-C being a common replacement.
   Est. part cost: $30-$80
4. Failed Camshaft or Crankshaft Position Sensor ⚪ Low Probability While sensors can fail, they are less common culprits for a correlation code than the mechanical parts they monitor. The sensor is usually just reporting the timing discrepancy correctly.
   How to confirm: Use a scan tool with live data to monitor the signals from both sensors. An oscilloscope provides the most accurate diagnosis by comparing the sensor waveforms against a known-good pattern. A sensor that provides no signal or an erratic signal is faulty.
   Typical fix: Replace the failed sensor. The Bank 1 exhaust camshaft sensor is on the rear cylinder head. The crankshaft sensor is typically on the lower front of the engine block.
   Est. part cost: $25-$60 per sensor

Rare But Worth Checking

• Failed Camshaft Phaser: The phaser is the gear on the end of the camshaft that actually adjusts the timing. It can fail mechanically or get clogged with debris, but it's usually replaced as part of a full timing chain job.
• Incorrect Timing After a Previous Repair: If the code appears immediately after a timing chain replacement, it's highly likely the timing was set incorrectly by one tooth. One owner reported this exact scenario after leaving slack on the wrong side of the chain during reassembly.

Diagnosis Steps

1. Check Engine Oil: Verify the oil level is correct and the oil is clean. If low, top it off. If dirty or milky, change the oil and filter immediately. This is the simplest and most crucial first step.
2. Scan for Codes: Use an OBD-II scanner to confirm P0017 and look for any other related codes (like P0016, P0018, P0019) that can help pinpoint the issue.
3. Inspect VCT Solenoid: Locate the Bank 1 exhaust VCT solenoid on the rear valve cover. Check its wiring and connector for damage. Per Ford TSBs, use a scan tool's bidirectional control to command the solenoid on and off 10 times to try and dislodge debris. Listen for a click. If unsure, swap it with the intake solenoid and see if the code follows (changes to P0016).
🎬 Watch: How to test and fix the Bank 1 exhaust solenoid.
4. Test Sensors: Use a scan tool to view live data from the crankshaft and camshaft position sensors to ensure they are sending a signal. An oscilloscope is the best tool to verify the timing relationship between the two signals against a known-good waveform.
5. Inspect Mechanical Timing: If the above steps do not reveal the cause, the issue is likely mechanical. This requires removing the front engine cover to inspect the timing chain for slack, check the tensioner for extension (5+ teeth showing indicates a stretched chain), and look for broken guides. This step is labor-intensive and best left to a professional.
🎬 Watch: A deep dive into Ford 3.5L jumped timing chain issues.
6. Check for Water Pump Leakage: While the timing cover is off, inspect for any signs of coolant leakage from the water pump weep holes or casing, which would confirm the need for replacement and explain oil contamination.

Parts You'll Likely Need

• Timing Chain and Water Pump Kit (OEM #AT4Z-6268-A (Chain), BL3Z-6268-A (Chain)) — This is the most probable cause on the 3.5L Duratec due to the internal water pump design. A complete kit ensures all worn components are replaced at once.
  Trusted brands: Motorcraft, Melling, Cloyes
  OEM price range: $500-$900
  Aftermarket price range: $350-$600
• Variable Camshaft Timing (VCT) Solenoid (OEM #7T4Z-6M280-C) — This solenoid controls oil flow to the cam phaser and is a common failure point due to oil contamination. It's a likely fix if no timing chain rattle is present.
  Trusted brands: Motorcraft, Dorman, Standard Motor Products (SMP)
  OEM price range: $50-$90
  Aftermarket price range: $30-$70

Related Codes That Often Appear With This One

• P0016 — This is the correlation code for the intake camshaft on the same bank (Bank 1). Seeing P0016 and P0017 together strongly suggests a base timing issue, like a stretched chain, affecting the entire bank.
• P0018 / P0019 — These are the equivalent correlation codes for Bank 2 (radiator side). If you see codes for both banks (e.g., P0017 and P0019), the problem is almost certainly with a component common to both, like the primary timing chain or crankshaft reluctor wheel.
• P0015 — This code means 'B' Camshaft Position - Timing Over-Retarded (Bank 1). It points to a control problem with the same exhaust camshaft, often caused by the same faulty VCT solenoid or oil issue.

Technical Service Bulletins (TSBs) & Recalls

• TSB 16-0093: Addresses VCT-related DTCs including P0017 on low-mileage 2016 vehicles, recommending solenoid replacement.
• SSM 48423: Suggests debris may cause VCT solenoids to stick and advises cycling the solenoid with a scan tool before replacement.
• SSM 47170: Notes that P0017 may be due to small debris causing the VCT solenoid to stick.
• Customer Satisfaction Program 13N03: Acknowledged electronic throttle body failures, though this program has expired.

Platform-Specific Known Issues

• The internal, timing-chain-driven water pump is the most significant issue. Its failure contaminates the engine oil with coolant, leading to lubrication failure and accelerated wear of the entire timing system. There was no recall for this design.
• A rattling noise on startup that lasts for a few seconds is a classic symptom of a stretched timing chain and failing tensioners on this engine.

Mechanic-Grade Diagnostic Values

• VCT Solenoid Internal Resistance — expected: 5 - 14 Ohms. Failure: A reading of 0 Ohms (short), infinity/OL (open), or outside the specified range indicates a failed solenoid.
• VCT Solenoid Connector Voltage — expected: ~12V (Battery Voltage) with Key On, Engine Off. Failure: No voltage or significantly low voltage points to a problem in the power supply wiring or the PCM.
• Camshaft Position Sensor (3-wire Hall Effect) Signal Voltage — expected: Signal wire should switch between approximately 0V and 5V as the engine is cranked.. Failure: Voltage that is stuck high, stuck low, or does not produce a clean square wave on an oscilloscope indicates a faulty sensor or wiring issue.
• Minimum Hot Idle Oil Pressure — expected: Above 15-25 PSI. Failure: Pressure below this threshold may be insufficient to properly operate the VCT phasers, even if the oil level is full.

Hidden / Shadow Codes Worth Checking

• Mode $06, Test ID (TID) for Cam/Crank Correlation: While not a 'hidden code,' Mode $06 data can reveal a failure in the cam/crank correlation monitor before the PCM sets the P0017 code. A technician can view the raw test values and see if they are approaching the failure threshold, indicating a borderline problem. (see via Requires a professional scan tool or an advanced OBD-II reader (like FORScan) that can access and interpret Mode $06 data.)

Scan Tool Commands That Help

• Ford IDS, FORScan, or equivalent professional scanner: VCT Solenoid On/Off Test or Duty Cycle Command — Per Ford TSBs (like SSM 50067), this command should be used to cycle the suspect solenoid (Bank 1 Exhaust) 10 times at idle. This can dislodge small debris causing it to stick. If the engine idle does not change or stumble when the solenoid is commanded, it confirms a problem with the solenoid, its oil passages, or the phaser itself.
• Ford IDS, FORScan, or equivalent professional scanner: Monitor VCT PIDs (e.g., VCT_EXH_CMD1, VCT_EXH_ACT1, VCT_EXH_ERR1) — While running the engine, a technician can compare the PCM's commanded camshaft angle (CMD) to the actual angle reported by the sensor (ACT). The error value (ERR) shows the difference. A large and persistent error value confirms the timing is not being correctly controlled and points to a mechanical or hydraulic issue rather than a sensor glitch.

Wiring & Ground Locations

• Bank 1 Camshaft Position Sensor (Exhaust) — On the rear of the right cylinder head (the bank closer to the firewall).. This is the specific sensor ('Sensor B') that reports the timing data for the P0017 code. The wiring harness to this sensor can be damaged by heat and vibration.
• Bank 1 VCT Solenoid (Exhaust) — Located on the rear valve cover, controlling the exhaust camshaft for the firewall-side bank.. This solenoid is the actuator that controls oil flow to the phaser. Its connector is a primary test point for voltage and resistance.
• Engine Harness Ground Strap — On similar Ford V6 platforms, a main ground strap for the engine wiring harness is bolted to the chassis near the passenger side strut tower.. The PCM, sensors, and solenoids all rely on a clean ground path. A loose or corroded ground at this location can cause erratic voltage, leading to unpredictable VCT system behavior and false timing codes.

Real Owner Repair Stories

• Ford F150 Forum & Go-Parts article compilation (2011 Ford F-150 3.5L (Same engine family, same code)) — P0017 code appeared immediately after a complete timing chain and phaser replacement job.
  ❌ Tried (didn't work) Clearing the code (it returned instantly)
  ✅ What actually fixed it The consensus from experienced users was that the timing was set incorrectly by one tooth on the primary chain during reassembly. The only fix was a complete teardown to re-time the engine correctly.
• Go-Parts article documenting forum cases (Ford platforms with 3.5L engine) — P0017 code returned immediately or shortly after replacing the VCT solenoid.
  ❌ Tried (didn't work) Replacing the VCT solenoid with an aftermarket part
  ✅ What actually fixed it The issue was traced to a faulty-out-of-the-box aftermarket solenoid. The problem was only resolved by installing a genuine OEM Motorcraft VCT solenoid.

"I Checked Everything" — The Actual Cause

• A smoke test is not applicable for this code. However, a similar diagnostic dead-end occurs when a technician correctly identifies a faulty VCT solenoid and replaces it, but the P0017 code persists. In several documented cases, the root cause was a defective aftermarket replacement solenoid. The fix was to replace the brand new aftermarket part with a genuine OEM Motorcraft solenoid, after which the code was resolved.

When the Usual Fixes Don't Work

• While a stretched timing chain or bad water pump are the most severe common causes, do not immediately assume a major repair is needed. A significant number of P0017 cases on this platform are resolved by addressing simpler issues. One documented pattern is a faulty aftermarket VCT solenoid causing the code to persist even after replacement; the fix was installing an OEM Motorcraft part. Another is an immediate code after a timing job, which was fixed by re-doing the work to correct the timing by a single tooth. These cases prove that proper diagnosis and quality parts are critical and can prevent an unnecessary second teardown.

OEM Part Supersession History

• 7T4Z-6M280-A, 7T4Z-6M280-AA, 7T4Z-6M280-B → 7T4Z-6M280-C — Part revision and improvement by the manufacturer.

Model Year Variations Within This Range

• Approx. 2011-2019: Around 2011, the 3.5L Duratec engine was updated to use a 'silent type' timing chain instead of the previous roller chain design. While the internal water pump issue is common to both, the wear characteristics and specific replacement parts for the chain itself may differ. Verification by VIN is crucial when ordering timing components.

Diagnostic Flowchart

Other Known Issues on This Vehicle

Issues unrelated to this code that are worth knowing about as an owner of this generation:

• Internal Water Pump Failure 🔴 High — Common failure, often cited between 100,000 and 150,000 miles. Can cause catastrophic engine damage if coolant contaminates oil.
• Electronic Throttle Body (ETB) Failure 🟠 Medium — Widespread issue causing sudden 'limp mode' where the vehicle loses power. Often requires full replacement. Codes P2111 and P2112 are common. (Ref: Customer Satisfaction Program 13N03 (Expired))
• Power Transfer Unit (PTU) Leak / Failure (AWD Models) 🔴 High — The PTU on all-wheel-drive models is prone to overheating and fluid breakdown, leading to seal leaks and internal bearing failure. It holds very little fluid and is often neglected during service.
• Cam Phaser Rattle 🟠 Medium — While less common than on the EcoBoost versions, the naturally aspirated 3.5L can still experience cam phaser issues, causing a rattling noise on cold starts.

Used vs. New Parts: Buying Guide for This Vehicle

When a used part is the smart pick: For repairing a P0017 code, obtaining used parts from a junkyard is strongly discouraged. The primary causes are either wear-and-tear items (timing chain, water pump) or contamination-sensitive electronic parts (VCT solenoids, sensors). The risk of a used part failing quickly or being faulty upon installation is very high.

What to inspect on the donor part:

• Not applicable, as used parts are not recommended for this repair.

OEM-only on this vehicle (don't cheap out):

• VCT Solenoids: Strongly recommended to use OEM Motorcraft parts. Aftermarket solenoids have been reported to be faulty out-of-the-box, leading to persistent codes and incorrect re-diagnosis of a larger mechanical issue.
• Timing Chain & Water Pump Kit: While high-quality aftermarket kits exist, OEM Motorcraft parts provide the highest assurance of longevity for this labor-intensive and critical repair.

Aftermarket brands forum-validated for this vehicle:

• Cloyes (for timing chain kits)
• Melling (for timing chain kits and oil pumps)

Brands owners have reported issues with on this vehicle:

• Unbranded, 'white-box' VCT solenoids and sensors from online marketplaces due to high reports of premature failure or being dead-on-arrival.

Real Owner Stories

Aggregated from forums and TSBs cited above. Mileages and costs reflect what owners reported in those sources.

Related OBD-II Codes

• P0016 — A companion correlation code; if you swap the Bank 1 exhaust solenoid with the intake solenoid and the code changes to P0016, it confirms the solenoid is faulty.
• P0018 — Related bank-specific timing correlation code often scanned alongside P0017 to help pinpoint the scope of the timing misalignment.
• P0019 — Related bank-specific timing correlation code that may appear if the mechanical timing issue affects multiple camshafts.

Frequently Asked Questions