P0024 on 2003-2010 BMW N62 V8: Exhaust Camshaft Timing Over-Advanced (Bank 2) Causes and Fixes

What's Unique About the 2003-2010 BMW Multiple

The N62 V8 engine utilizes a Double-VANOS system that adjusts both intake and exhaust camshafts, and it is highly dependent on clean engine oil and correct oil pressure to function. While VANOS solenoids are a frequent failure point across many BMW engines, the P0024 code on an N62 can also be an early warning for more serious, though less common, platform-specific issues like timing chain guide wear, which can be exacerbated by poor oil maintenance. Unlike its predecessor, the M62, widespread timing chain guide failure is not a primary characteristic of the N62, but it can occur, making accurate diagnosis crucial. A unique and critical point of failure on some N62s is that the intake and exhaust camshaft position sensors on Bank 2 are physically different parts; swapping them during a repair like a valve cover gasket replacement is a common mistake that will trigger this code.

Generation note: The N62 V8 engine was used across several BMW platforms between 2003 and 2010, including the 5-Series (E60), 6-Series (E63/E64), 7-Series (E65/E66), and X5 (E53/E70). The fundamental causes and fixes for P0024 are consistent across these models as they share the same core engine architecture.

Symptoms You May Notice

• Check Engine Light illuminated
• Rough or uneven idle, sometimes described as the engine 'shaking' at a stop.
• Loss of power and sluggish acceleration, especially noticeable above 2,000 rpm.
🎬 Watch: How to fix N62 engine hesitation and power loss.
• Hesitation or 'bogging' when accelerating.
• Reduced fuel economy
• Engine may be hard to start
• Rattling noise from the engine, which could indicate a timing chain issue.

Most Likely Causes

1. Failed Bank 2 Exhaust VANOS Solenoid 🔴 High Probability VANOS solenoids operate using engine oil and can become clogged with sludge or varnish over time, or fail electrically. This is the most common point of failure in the VANOS system. Owners often report a significant improvement in throttle response and smoothness after replacement.
   How to confirm: Swap the Bank 2 exhaust solenoid with the Bank 1 exhaust solenoid (passenger side). Clear the codes and drive the vehicle. If the fault code changes to P0014 (Bank 1 Exhaust Over-Advanced), the solenoid is confirmed to be faulty. Before replacing, some owners attempt to clean the solenoids with brake cleaner or compressed air as a temporary fix or diagnostic step.
   Typical fix: Replace the faulty VANOS solenoid. It is often recommended to replace them in pairs (both exhaust or all four).
   Est. part cost: $75-$200
2. Low or Dirty Engine Oil 🔴 High Probability The VANOS system is hydraulic and extremely sensitive to oil level, viscosity, and quality. Low pressure or contaminated oil can prevent the solenoids and actuators from moving correctly, triggering timing faults.
   How to confirm: Check the engine oil level via the iDrive system or dipstick (if equipped). Inspect the oil's condition on the oil filter cap. If it is dark, sludgy, or past its service interval, it needs to be changed. Ensure the correct BMW-spec oil (e.g., 5W-30 synthetic) is being used.
   Typical fix: Perform an engine oil and filter change using a BMW-approved synthetic oil of the correct viscosity. Clear the codes and re-evaluate.
   Est. part cost: $80-$150
3. Incorrectly Installed/Failed Bank 2 Camshaft Position Sensor (CPS) 🟡 Medium Probability On Bank 2 (driver's side) of many N62 engines (notably the 4.4L), the intake and exhaust camshaft position sensors are different parts. The intake sensor has a pigtail lead, while the exhaust does not. It is a very common error to swap these during reassembly for another job (like valve cover gaskets), which will immediately cause timing codes P0021 and P0024.
   How to confirm: Visually inspect the two camshaft position sensors on the front of the Bank 2 cylinder head. Confirm the correct sensor is in the correct position. The exhaust sensor (typically lower) should be part number 12147518628 (3-pole connector), while the intake sensor (upper) may be 12147539172 (pigtail lead). If they are swapped, this is the cause. If they are correctly installed, you can then try swapping the exhaust CPS with the one from Bank 1 to see if the code moves to P0014.
   Typical fix: Install the correct camshaft position sensors in their proper locations. If a sensor has failed, replace it.
   Est. part cost: $60-$120

Rare But Worth Checking

• Worn Timing Chain, Guides, or Tensioner: While less common than on the older M62 engine, the N62 can still suffer from stretched chains or broken plastic guides, especially with high mileage or poor maintenance leading to oil sludge. This is a major repair and should be investigated if solenoid/sensor swaps do not resolve the code.
• Failed VANOS Cam Phaser/Actuator: The mechanical gear on the camshaft itself can fail or get stuck due to internal wear or oil starvation. This is much less common than a solenoid failure and more difficult to diagnose and repair, often requiring specialized timing tools.
• Clogged Oil Passages / Check Valves: Severe engine sludge can block the small oil passages leading to the VANOS actuators in the cylinder head, starving them of the oil pressure needed to operate. Some engines also have small filter screens in the cylinder head for the VANOS system that can become clogged.

Diagnosis Steps

1. Read the code with an OBD-II scanner to confirm P0024 is present. Note any other codes, especially P0021.
2. Check the engine oil level and condition. If the oil is low, dirty, or the wrong type, perform an oil and filter service with BMW-approved oil (e.g., 5W-30 synthetic). Clear the code and see if it returns.
3. CRITICAL: Visually inspect the camshaft position sensors on Bank 2 (driver's side). Verify the correct part is in the correct location. A sensor with a pigtail (12147539172) is for the intake (upper), and the sensor with the integrated connector (12147518628) is for the exhaust (lower). If they are swapped, correct them. This is a very common fix.
4. If sensors are correct, locate the two VANOS solenoids on the front of the Bank 2 valve cover. The exhaust solenoid is typically the lower one.
5. Swap the Bank 2 exhaust solenoid with the Bank 1 exhaust solenoid (passenger side). They are identical parts (P/N 11367585425).
6. Clear the codes and drive the vehicle. If the code returns as P0014 (Bank 1), the solenoid you moved is faulty and needs to be replaced.
7. If the P0024 code returns, the issue is not the solenoid. Inspect the wiring and connector to the Bank 2 exhaust solenoid and camshaft position sensor for any damage or oil contamination.
8. If wiring is okay, you can now proceed to swap the Bank 2 exhaust camshaft position sensor with the one from Bank 1 to test for sensor failure. If the code moves, the sensor is bad.
9. If the code still persists, the problem is likely mechanical. This could be a failing VANOS actuator (cam phaser) or a problem with the timing chain/guides. At this point, professional diagnosis with specialized tools is strongly recommended.

Parts You'll Likely Need

• VANOS Solenoid (OEM #11367585425) — This is the most common cause of P0024, as it gets clogged or fails electrically, preventing proper control of camshaft timing. All four solenoids on the N62 are identical.
  Trusted brands: BMW (Genuine), Pierburg (OEM), Bosch, Uro Parts
  OEM price range: $150-$220
  Aftermarket price range: $60-$120
• Exhaust Camshaft Position Sensor (Bank 2) (OEM #12147518628) — This sensor provides the camshaft position data to the DME. It can fail over time, or more commonly on the N62, it is swapped with the different intake sensor on the same bank during other repairs, causing this code.
  Trusted brands: BMW (Genuine), VDO (OEM), Bosch, Continental
  OEM price range: $80-$130
  Aftermarket price range: $40-$90

Related Codes That Often Appear With This One

• P0014 — This is the equivalent code for Bank 1 ('B' Camshaft Position - Timing Over-Advanced). It will appear if the faulty Bank 2 solenoid is swapped to Bank 1 for diagnosis.
• P0021 — This code is for the intake camshaft timing being over-advanced on Bank 2. Seeing P0021 and P0024 together strongly suggests the Bank 2 intake and exhaust camshaft position sensors have been swapped, as this is a common outcome of that specific mistake.
• P0305, P0306, P0307, P0308 — These are misfire codes for the cylinders on Bank 2 (5, 6, 7, and 8). Incorrect camshaft timing can lead to poor combustion and cause misfires on the affected bank.

Platform-Specific Known Issues

• The N62 engine is known for oil leaks from valve cover gaskets and timing covers. These leaks can lead to a low oil level, which directly causes VANOS faults like P0024. During valve cover gasket replacement, the camshaft position sensors are often removed, leading to the common error of swapping the two different sensors on Bank 2.

Mechanic-Grade Diagnostic Values

• VANOS Solenoid Resistance — expected: 10.7 to 11.5 Ohms.. Failure: A reading significantly outside this range, or an open circuit (infinite resistance), indicates a failed solenoid coil. Readings around 10.3-10.5 Ohms may still be functional but could indicate aging.
• Camshaft Position Sensor (3-wire Hall Effect) Signal Voltage — expected: The sensor should switch between approximately 5V and 0V as a metallic object (like the lobes on the camshaft reluctor wheel) passes by it.. Failure: If the voltage does not switch, or is stuck high or low, the sensor is likely faulty. This test requires back-probing the signal wire while the sensor is connected and the ignition is on.
• VANOS Solenoid Activation Test — expected: When 12V is applied directly to the solenoid's pins, a distinct 'click' should be heard as the internal piston moves.. Failure: No click indicates the solenoid is mechanically seized, likely due to sludge or internal failure. This is a common bench test after removal.

Hidden / Shadow Codes Worth Checking

• 2A87: Exhaust VANOS, jammed mechanically. This is a common BMW-specific code that often accompanies the generic P0024, pointing more directly to a mechanical issue with the exhaust VANOS system on the affected bank, such as a stuck solenoid or phaser. (see via BMW-specific diagnostic software like ISTA, INPA, or high-end scanners with BMW software packages.)
• 2A99: Crankshaft - exhaust camshaft, correlation. This code indicates a discrepancy between the crankshaft's position and the exhaust camshaft's position, which directly relates to the timing over-advanced condition of P0024. (see via BMW-specific diagnostic software like ISTA, INPA, or advanced aftermarket scanners.)

Scan Tool Commands That Help

• ISTA (Rheingold): VANOS Test Plan — This guided diagnostic function will activate each VANOS solenoid individually and compare the commanded camshaft angle with the actual angle reported by the camshaft position sensor. It's the most definitive way to test the system's response and can pinpoint whether the issue is with the solenoid, actuator, or sensor.
• ISTA (Rheingold) / INPA / Autel: Clear/Reset Adaptation Values (DME) — After replacing a VANOS solenoid, camshaft sensor, or performing any major engine work, it is critical to reset the engine's adaptation values. This forces the DME to relearn the operational parameters of the new components, ensuring smooth operation and preventing the old, incorrect learned values from causing persistent issues.

Wiring & Ground Locations

• Engine Ground Straps — A primary engine ground strap is typically located on the driver's side (LHD) of the engine, connecting from an engine mount to the chassis rail.. A corroded or loose engine ground can introduce electrical noise and voltage drops, potentially affecting the readings of sensitive components like camshaft position sensors and the DME's ability to accurately control the VANOS solenoids, leading to erroneous timing faults.
• Ignition Coil Grounding Points — There are grounding points for the ignition coil wiring harness on the cylinder heads.. While not directly for the VANOS circuit, these grounds are part of the overall engine electrical system. During repairs like valve cover gasket replacement, these grounds are removed. If they are not cleaned and securely re-fastened, it can cause system-wide electrical issues that may manifest as sensor or actuator faults.

Real Owner Repair Stories

• Xoutpost.com user 'X5only' (2005 BMW X5 4.4i (E53 N62)) — Check Engine Light, DME error codes P0021 and P0024, and misfires after performing a large number of repairs including valve cover gaskets.
  ❌ Tried (didn't work) The owner was overthinking the problem and considering re-timing the engine.
  ✅ What actually fixed it The Bank 2 (driver's side) intake and exhaust camshaft position sensors had been accidentally swapped during reassembly. The intake sensor (with a pigtail lead, P/N 12147539172) was in the exhaust position, and the exhaust sensor (integrated connector, P/N 12147518628) was in the intake position. Swapping them back to their correct locations immediately resolved all codes and symptoms.

OEM Part Supersession History

• 11367516293 → 11367585425 — Standard part evolution for improved reliability or manufacturing process change.
  Heads up: The parts are fully interchangeable. When ordering, you will receive 11367585425.

Model Year Variations Within This Range

• 2005-onward: Starting in model year 2005, the N62 was updated to the N62TU ('Technical Update'). While the core VANOS system operation remained the same, there were internal engine changes and the 4.4L was replaced by the 4.8L in many models. The critical diagnostic point of having different intake/exhaust camshaft sensors on Bank 2 remains on the N62TU.

Diagnostic Flowchart

Other Known Issues on This Vehicle

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

• Valve Stem Seal Failure 🔴 High — Extremely common, typically occurs between 70,000 and 120,000 miles. Causes significant blue/white smoke from the exhaust after idling.
• Coolant Transfer Pipe Seal Leak 🔴 High — Common on higher-mileage engines. A seal inside the 'V' of the engine fails, causing a coolant leak from a weep hole at the front of the engine. Repair is extremely labor-intensive.
• Alternator Bracket Gasket Leak 🔴 High — Very common failure. A gasket between the water-cooled alternator bracket and the engine block degrades, causing a major oil leak onto the alternator and other components.
• Valve Cover and Timing Cover Gasket Leaks 🟠 Medium — Almost guaranteed to occur. These gaskets become brittle with heat and age, causing persistent oil leaks.
• Worn Valvetronic Eccentric Shaft Levers 🟠 Medium — Can occur at higher mileage (100k+ miles), causing cold-start misfires and rough running until the engine warms up.

Used vs. New Parts: Buying Guide for This Vehicle

When a used part is the smart pick: Used VANOS solenoids and camshaft position sensors can be a cost-effective option, especially if sourced from a reputable dismantler who can provide the donor vehicle's mileage. Given they are common failure items, a used part is a gamble, but can be a valid diagnostic step if you get a pair to swap around.

Donor-vehicle mileage cap: roughly under 80000 miles for the part to have meaningful remaining life.

What to inspect on the donor part:

• For VANOS solenoids, inspect the mesh screens for any tears or significant, caked-on sludge that can't be cleaned.
• For camshaft position sensors, check for cracks in the plastic housing and ensure the o-ring is pliable (though it should be replaced anyway).
• Ask for the VIN of the donor car to verify it had a lower mileage and was not involved in a front-end collision that could have damaged the sensors/solenoids.

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

• While not strictly 'OEM-only', critical electronic sensors like Camshaft Position Sensors are highly recommended to be sourced from OEM (BMW Genuine) or the original equipment manufacturer (e.g., VDO, Bosch). Cheaper, unbranded aftermarket sensors have a high rate of being dead-on-arrival or failing prematurely.

Aftermarket brands forum-validated for this vehicle:

• Pierburg (often the OEM for VANOS solenoids)
• VDO / Continental (often the OEM for sensors)
• Bosch

Brands owners have reported issues with on this vehicle:

• Unbranded, 'white-box' parts from online marketplaces are a significant risk and often cause more diagnostic headaches than they solve.

Real Owner Stories

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

Related OBD-II Codes

• P0014 — This is the equivalent 'Over-Advanced' code for the exhaust camshaft on Bank 1. It commonly appears during diagnosis when a faulty Bank 2 solenoid (causing P0024) is swapped to Bank 1, confirming the solenoid is the cause.
• P0021 — This is the 'Over-Advanced' code for the *intake* camshaft on the same bank (Bank 2). It often appears alongside P0024 when the Bank 2 intake and exhaust camshaft position sensors are incorrectly swapped, as this single error affects both readings.
• P0011 — This is the 'Over-Advanced' code for the intake camshaft on Bank 1. It can appear with P0024 if there is a systemic issue affecting the entire VANOS system, such as severely low or contaminated engine oil.
• P0392 — This code indicates a fault with the Bank 2 exhaust camshaft position sensor circuit. A failing or incorrectly installed sensor can cause both a circuit fault (P0392) and an incorrect timing reading (P0024).

Frequently Asked Questions