P0014 on 2004-2011 Audi A6 4.2L V8: Exhaust Camshaft Timing Over-Advanced Causes and Fixes

What's Unique About the 2004-2011 Audi A6

The 4.2L V8 in this generation of Audi A6 (the C6 platform, with the BVJ engine code) has its four timing chains located at the rear of the engine, against the firewall. While the chains themselves are durable, the plastic tensioner guides can become brittle and fail. Unlike a typical timing belt/chain job where components are at the front of the engine, fixing this requires removing the entire engine and transmission from the car. This makes it an exceptionally labor-intensive and expensive repair, often costing over $9,000. Therefore, while P0014 can be a simple fix, it must be taken seriously on this specific vehicle as it can be an early warning of this catastrophic guide failure.

Symptoms You May Notice

• Check Engine Light is on
• Rattling or ticking noise from the back of the engine, especially on cold starts.
🎬 Hear the difference: Cold start rattle before and after repair
• Rough or unstable idle.
• Loss of engine power and sluggish acceleration.
• Reduced fuel economy.
• Engine stalling in some cases.
• Hard starting.

Most Likely Causes

1. Low or Dirty Engine Oil 🔴 High Probability The entire variable valve timing (VVT) system is hydraulic and highly dependent on oil pressure and cleanliness. Old, incorrect, or low-level oil can cause the camshaft adjusters to respond slowly or get stuck, triggering the P0014 code. These engines can also consume oil, making low levels more likely.
   How to confirm: Check the oil level using the dipstick or the MMI system. Check the oil's color and consistency. If it's dark, gritty, below the minimum mark, or past its service interval, this is the most logical starting point.
   Typical fix: Perform an oil and filter change using a high-quality full synthetic oil that meets Audi's VW 502 00 specification. Clear the codes and see if the issue is resolved.
   Est. part cost: $80-$150
2. Failing Camshaft Adjuster Solenoid (Oil Control Valve) 🟡 Medium Probability → Shop Engine Camshaft These solenoids, also known as N205 valves, control oil flow to the camshaft phasers. They can become clogged with oil sludge or fail electronically over time, causing them to stick in the advanced position.
   How to confirm: A common diagnostic step is to swap the Bank 1 exhaust solenoid with the Bank 2 (driver's side) exhaust solenoid. Clear the codes and drive the vehicle. If the code changes to P0024 (the Bank 2 equivalent), the solenoid is confirmed to be faulty. Resistance can also be tested with a multimeter; one source suggests a target range of 6.9 to 7.9 ohms.
   Typical fix: Replace the faulty camshaft adjuster solenoid. It is often recommended to replace them in pairs (e.g., both exhaust solenoids) or all four at once for preventative maintenance.
   Est. part cost: $50-$220
3. Failing Timing Chain Tensioners and Guides ⚪ Low Probability → Shop Engine Timing Chain The plastic guides for the four timing chains at the rear of the engine can become brittle with age and heat cycles, breaking apart. This introduces slack into the chain, causing timing deviations that the ECM detects as a fault, and a characteristic 'death rattle' on startup.
   How to confirm: This is a difficult diagnosis. A key symptom is a loud rattling from the rear of the engine on startup that lasts 1-2 seconds. A mechanic can use an advanced scan tool like VCDS to check camshaft deviation in measuring block 093. 🎬 Watch: How to check camshaft deviation using VCDS Values consistently exceeding a total of 7-8 degrees for a bank strongly suggest a mechanical timing problem. Visual inspection requires engine removal. 🎬 See the full engine-out timing service process
   Typical fix: This requires a complete timing service, replacing all chains, tensioners, and guides. This is an engine-out job on the 4.2L V8.
   Est. part cost: $1000-$2000 for a comprehensive kit.

Rare But Worth Checking

• Failed Camshaft Phaser/Adjuster Unit: → Shop Engine Camshaft The mechanical adjuster unit (phaser) that the solenoid sends oil to can fail internally, but this is much less common than a solenoid or guide failure.
• Clogged Oil Passages or Solenoid Screens: In engines with a history of poor maintenance and oil sludge, the small oil passages or the fine mesh screens on the solenoids themselves can become blocked, starving the components of oil pressure.
• Failing Oil Non-Return Valves: Located in the engine valley under the intake manifold, these check valves are designed to keep oil in the cylinder heads after the engine is shut off. If they fail and stick open, oil can drain back, causing a delay in oil pressure to the VVT system on startup. This can lead to startup rattle and, potentially, timing codes.

Diagnosis Steps

1. Check Engine Oil: Verify the oil level is correct and the oil is clean and of the proper VW 502 00 specification. If low, dirty, or incorrect, perform an oil and filter change, clear the code, and see if it returns.
2. Scan for Codes: Use an OBD-II scanner to confirm P0014 and check for any other related codes, such as P0011, P0024, or P0366.
3. Inspect Solenoid Wiring: Check the electrical connector and wiring to the Bank 1 exhaust camshaft adjuster solenoid for any damage or loose connections.
4. Swap Solenoids: Locate the exhaust solenoids on Bank 1 (passenger side) and Bank 2 (driver's side). They are on the front of the valve covers. Swap them, clear the codes, and drive the car. If the code returns as P0024, the solenoid you moved to Bank 2 is faulty and needs replacement. This is a very common and effective diagnostic step mentioned in owner forums.
5. Check Camshaft Deviation: If the code P0014 returns after the swap, the issue is likely not the solenoid. Use an advanced scan tool like VCDS to view Measuring Value Blocks, specifically block 093. If the phase deviation at idle is consistently high (e.g., approaching or exceeding a total of 7-8 degrees for the bank), it strongly indicates a mechanical timing problem (chain/guides/tensioners).
6. Listen for Chain Rattle: Pay close attention to any rattling or clattering noises from the rear of the engine during a cold start. A 1-2 second rattle is considered 'normal' by an Audi TSB, but a persistent or worsening rattle is a major red flag for guide failure.
7. Mechanical Inspection: If all else fails, a mechanical inspection of the timing system is necessary. This is a major job requiring engine removal to access the rear timing components.

Parts You'll Likely Need

• Camshaft Adjuster Solenoid / Oil Control Valve (OEM #06E109257P) — This is the most common part to fail that causes P0014, after ruling out oil issues. It gets stuck or clogged, preventing proper control of the camshaft phaser. It is also referred to as the N205 valve.
  Trusted brands: Audi (OEM), Pierburg (OEM Supplier), Febi, URO Parts
  OEM price range: $150-$220
  Aftermarket price range: $40-$120
• Engine Timing Chain Kit — If the cause is determined to be failing guides or tensioners, a complete kit is required for the engine-out service. These kits typically include all chains, guides, tensioners, and necessary seals.
  Trusted brands: Iwis (OEM chain supplier), Febi, INA, Graf
  OEM price range: $1500-$2500 (for parts kit)
  Aftermarket price range: $800-$1500 (for parts kit)

Related Codes That Often Appear With This One

• P0011 — This is the code for the intake camshaft on the same bank (Bank 1). If both appear, it could point to a more significant oil pressure or timing issue affecting the entire bank.
• P0024 — This is the equivalent code for the exhaust camshaft on Bank 2. If you see both P0014 and P0024, it could indicate a systemic issue like very low/dirty oil or failing tensioners affecting both sides.
• P0366 — This code for the Camshaft Position Sensor Performance can appear alongside P0014, indicating the ECM is seeing an implausible signal as a result of the timing being out of range.

Technical Service Bulletins (TSBs) & Recalls

• While a specific TSB for P0014 is not cited, Audi has issued technical service bulletins acknowledging that a brief 1-2 second rattle or knocking noise on cold start is 'normal' as oil pressure builds in the camshaft adjusters. The TSB explicitly states not to replace tensioners for this specific, brief noise. However, persistent rattling is a sign of failure.

Platform-Specific Known Issues

• The most significant issue for the C6 A6 4.2L V8 is the rear-mounted timing chain system. Failure of the plastic guides is a known problem that leads to chain slack, noise ('chain rattle'), and eventually timing codes like P0014. Because the engine must be removed for this service, the labor cost is extremely high, often exceeding the value of the car.
• A user on AudiWorld forums with an '06 A6 was quoted $1200-1500 for a cam tensioner job after getting a P0014 code, which highlights the significant cost even for partial timing work.
• Another potential cause for oil pressure-related timing issues on this engine are the oil non-return valves located in the valley. When they fail, oil drains from the heads, causing startup rattle and potential VVT problems.

Mechanic-Grade Diagnostic Values

• Camshaft Adjuster Solenoid (N205) Resistance — expected: 6.9 - 7.9 ohms at 68°F (20°C). Failure: An open circuit (no reading) or a reading significantly outside this range indicates a faulty solenoid.
• VCDS Camshaft Phase Deviation (Measuring Block 093) — expected: The sum of the intake and exhaust values for a single bank should be less than 7 degrees at idle.. Failure: A total deviation value for either bank that exceeds 7-8 degrees, or a value for a single adjuster that is around 20 degrees, strongly suggests a mechanical timing issue like a stretched chain or a jumped tooth. A value of -11 degrees was flagged by a tuner as a sign of incorrect timing.

Hidden / Shadow Codes Worth Checking

• 16398 / 000020: This is the Ross-Tech VCDS specific fault code equivalent for P0014, often displayed as 'Bank 1: Camshaft B (Exhaust): Retard Setpoint not Reached (Over-Advanced)'. (see via Ross-Tech VCDS diagnostic software.)

Scan Tool Commands That Help

• VCDS (VAG-COM): Engine Output Tests — VCDS may allow for an output test to directly activate the N205 solenoid. This can help determine if the solenoid is physically capable of actuating when commanded by the ECM, separating a wiring/ECM issue from a stuck mechanical solenoid.
• VCDS (VAG-COM): View Measuring Blocks (e.g., 091, 093) — This is the primary diagnostic function for this code. Block 093 shows the phase position (camshaft deviation) for both banks, which is critical for differentiating between a solenoid/oil issue and a much more serious mechanical timing (chain/guide) failure.

Wiring & Ground Locations

• N205 Solenoid Connector — On the front of the valve covers for each bank. The Bank 1 (passenger side) exhaust solenoid is the component in question for P0014.. The 2-pin connector provides power and control to the solenoid. A loose, corroded, or oil-fouled connector can cause intermittent or complete failure of the solenoid, directly leading to code P0014.
• Ground Point 18 — Directly on the engine block.. This is a primary ground connection for the engine and its sensors. A poor connection here can cause erratic electrical behavior and unstable sensor readings, potentially affecting the camshaft position sensors that monitor the VVT system's operation.
• Engine to Body Ground Strap — Typically a braided strap connecting the engine block or transmission to the vehicle's firewall or chassis.. Ensures the entire engine has a solid ground reference to the vehicle's electrical system and ECM. A weak or corroded strap can lead to a variety of difficult-to-diagnose electrical issues, including sensor and actuator faults.

Real Owner Repair Stories

• AudiForums.com user (Audi A6 with P0014) — Check Engine Light with P0014, hard starting after the code appeared.
  ❌ Tried (didn't work) Took timing apart completely., Replaced oil-fed adjuster gaskets and cam end gaskets., Thoroughly cleaned the Bank 1 adjuster., Reset all timing from scratch using correct tools.
  ✅ What actually fixed it The user did not post a final fix, but the story is valuable as it shows a case where a complete, by-the-book timing component refresh did NOT solve the P0014 code, suggesting the cause was likely an oil pressure delivery issue (clogged passage, bad check valve) or a faulty phaser unit itself, which was not replaced.
• AudiWorld Forums user 'bistdureal1' (2006 Audi A6 3.2L (similar VVT system)) — Knocking/clicking noise, car shaking, poor acceleration, bad idle, codes P0366 and P0014.
  ❌ Tried (didn't work) The user was seeking advice before starting repairs.
  ✅ What actually fixed it A responding expert diagnosed the issue based on VCDS data showing a 20° deviation on Bank 2. The final diagnosis was that the timing chain tensioner on Bank 2 had failed, causing the chain to jump a tooth. The recommendation was to replace the tensioner and not run the engine to avoid valve damage. This highlights the diagnostic power of VCDS block 093.

OEM Part Supersession History

• 06E109257F, 06E109257J → 06E109257P — Part revision and consolidation by the manufacturer. Newer revisions often address underlying failure modes or improve material quality.
  Heads up: The parts are generally interchangeable, but it is always recommended to use the latest revision (06E109257P) for this repair.

Model Year Variations Within This Range

• 2006-2010: The BVJ engine was primarily used from 2006-2010 in the A6 and A8. Earlier C6 A6 models (2004-2005) may have used a different 4.2L V8 (e.g., BAT) which was a 40-valve, port-injected engine, not the 32-valve FSI BVJ engine. The diagnostic process is similar, but part numbers for timing components and sensors can differ significantly. It is critical to confirm the engine code before ordering parts.

Diagnostic Flowchart

Other Known Issues on This Vehicle

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

• Carbon Buildup on Intake Valves 🟠 Medium — Common on all FSI/direct injection engines, typically requires cleaning every 60k-100k miles.
• Excessive Oil Consumption 🟠 Medium — Frequently reported by owners, often caused by worn piston rings or valve seals on higher mileage examples.
• Intake Manifold Flap Motor Failure 🟡 Low → Shop Engine Intake Manifold — The motor or runner flaps can fail, causing a rough idle and fault codes. Typically occurs between 30k-60k miles.
• MMI (Multi-Media Interface) System Failures 🟡 Low — Can be caused by water leaks in the trunk damaging control modules or general electronic failure over time.
• Automatic Transmission Jerking/Slipping 🟠 Medium — Some owners report rough shifting or hesitation as the vehicle ages, which can sometimes be addressed with fluid changes but may indicate internal wear.

Used vs. New Parts: Buying Guide for This Vehicle

When a used part is the smart pick: A used Camshaft Adjuster Solenoid (N205 valve) from a low-mileage, reputable donor vehicle can be a cost-effective option, especially for diagnosis (swapping to see if the code moves). Ensure the screen is clean and the part comes with a return policy.

Donor-vehicle mileage cap: roughly under 60000 miles for the part to have meaningful remaining life.

What to inspect on the donor part:

• Check the fine mesh screen on the solenoid for any tears, clogs, or metallic debris.
• Verify the electrical connector is free of corrosion or damage.
• Ask for the VIN of the donor car to verify its year and mileage.
• Avoid parts from engines that show signs of heavy oil sludge.

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

• Timing Chain Tensioners and Guides: These are high-wear plastic and hydraulic components. Installing used ones is extremely risky and negates the massive labor investment of an engine-out service.
• Oil Non-Return Valves: Given the labor to access them under the intake manifold, it is not worth the risk to install used valves that may fail soon after.

Aftermarket brands forum-validated for this vehicle:

• Pierburg: An OEM supplier for the camshaft adjuster solenoid; their parts are considered equivalent to Genuine Audi.
• Iwis: An OEM supplier for timing chains.

Brands owners have reported issues with on this vehicle:

• Unnamed, no-brand 'white box' solenoids or timing kits from online marketplaces. Failure of these critical components can lead to catastrophic engine damage, making the initial cost savings insignificant compared to the risk.

Real Owner Stories

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

Related OBD-II Codes

• P0024 — The Bank 2 equivalent of P0014; often used in diagnostics by swapping solenoids to see if the fault follows the part.
• P0011 — Relates to the intake camshaft on Bank 1, often triggered by the same oil pressure or solenoid issues affecting P0014.
• P000B — Often appears alongside P0014 when the camshaft adjuster is responding slowly due to oil sludge or a failing N205 solenoid.
• P0366 — A companion code that may trigger if the ECM detects irrational signals from the exhaust camshaft sensor while attempting to manage timing.

Frequently Asked Questions