P0024 on 2006-2012 Toyota RAV4 3.5L V6: Exhaust Cam Timing Causes and Fixes

What's Unique About the 2006-2012 Toyota RAV4

The 2GR-FE engine in this RAV4 is generally robust, but its VVT system is sensitive to oil maintenance. The most common cause for P0024 is a simple, accessible Oil Control Valve (OCV) solenoid failure. However, this engine family is also famous for a critical issue with a rubber VVT-i oil supply line used in early production models (including the 2006-2009 RAV4) which could rupture, causing catastrophic oil loss and engine failure. While a burst line would cause more severe problems than just a P0024 code, it highlights the importance of the VVT system's oil supply integrity on this specific platform. Many vehicles may still have the original rubber line if the service campaign was not performed.

Symptoms You May Notice

• Check Engine Light is on
• Rough or unstable idle
• Poor acceleration and loss of power
• Engine hesitation or stalling
• Decreased fuel economy
• Engine may produce a ticking or clicking sound from the cylinder head area

Most Likely Causes

1. Failed Bank 2 Exhaust Oil Control Valve (OCV) 🔴 High Probability → Shop Engine Variable Valve Timing (VVT) Solenoid The OCV (or VVT solenoid) is a common failure point. It can get clogged with oil sludge if maintenance is deferred, or it can fail electrically, causing it to stick open or closed. The resistance should be between 6.9 and 7.9 ohms at 68°F (20°C).
   How to confirm: The most effective method is to swap the Bank 2 exhaust OCV (front of engine, near radiator) with the Bank 1 exhaust OCV (rear of engine, near firewall). They are identical parts. Clear the codes and drive. If the code changes to P0014 (the equivalent code for Bank 1), the OCV is confirmed as the faulty part.
   Typical fix: Replace the faulty Oil Control Valve. It is located on the front valve cover, held in by a single 10mm bolt and is easily accessible.
   Est. part cost: $40-$90
2. Low or Dirty Engine Oil 🔴 High Probability The VVT system is operated by hydraulic oil pressure. If the oil level is low or the oil is old, thick, and sludgy, it cannot operate the VVT actuators correctly. The 2GR-FE engine is known to be sensitive to oil condition for proper VVT operation.
   How to confirm: Check the engine oil dipstick for level and inspect the oil's color and consistency. If it is below the 'add' line or is dark and thick, this is a likely cause.
   Typical fix: Perform an engine oil and filter change using the manufacturer-specified 5W-30 synthetic oil. Ensure the oil level is at the full mark.
   Est. part cost: $40-$80
3. Clogged OCV Filter Screen 🟡 Medium Probability Each OCV has a small filter screen to protect it from debris. These screens can become clogged with sludge, restricting oil flow to the valve and VVT actuator. This is especially common on engines with a poor maintenance history.
   How to confirm: The filter is located in the cylinder head, often under a plug bolt near the OCV. 🎬 See how to locate and check the OCV filter screen It must be removed and visually inspected for blockage.
   Typical fix: Remove the filter and clean it thoroughly with brake cleaner and compressed air. If it is damaged or cannot be cleaned, it should be replaced. It is inexpensive and often recommended to replace when servicing the OCV.
   Est. part cost: $5-$15
4. Failing VVT-i Camshaft Gear Actuator ⚪ Low Probability → Shop Engine Camshaft The actuator itself, located on the end of the camshaft, can fail internally. This is less common than an OCV failure. Toyota issued TSB T-SB-0094-09 Rev1 for this issue on 2006-2009 models, which can be accompanied by a ticking noise. This is a much more involved and expensive repair.
   How to confirm: This is typically diagnosed after all other possibilities (oil, OCV, wiring) have been ruled out. A professional scan tool can command the actuator to move and observe its response, but this is difficult for a DIYer to test. The TSB requires inspection of the actuator bolts and alignment before proceeding with replacement.
   Typical fix: Replacement of the camshaft gear actuator, which is a significant labor-intensive job requiring removal of the valve cover and timing components.
   Est. part cost: $200-$400

Rare But Worth Checking

• Stretched Timing Chain: → Shop Engine Timing Chain On very high-mileage engines (200,000+ miles), the timing chain can stretch slightly, which can throw off camshaft timing enough to set a code. This would likely be accompanied by rattling noises on startup.
• Wiring Harness Issue: Damage to the wiring or connector for the Bank 2 exhaust OCV can cause a loss of signal. Check for frayed wires, corrosion in the connector, or rodent damage.

Diagnosis Steps

1. Check the engine oil level and condition. Top up or change the oil if it is low, old, or dirty. Use 5W-30 synthetic oil. Clear codes and see if P0024 returns.
2. Scan for any other trouble codes to see if other systems are reporting faults.
3. Locate the Bank 2 (front, radiator side) exhaust Oil Control Valve (OCV). Inspect its electrical connector and wiring for any visible damage, corrosion, or loose connections.
4. Perform a diagnostic swap. Swap the Bank 2 exhaust OCV with the Bank 1 exhaust OCV (located on the rear cylinder bank, near the firewall). They are identical parts. This is a widely recommended diagnostic step on owner forums.
5. Clear the trouble codes using a scan tool and drive the vehicle.
6. If the code returns as P0014, the OCV you moved to Bank 1 is faulty and needs to be replaced.
7. If the P0024 code returns, the problem is not the OCV. The next step is to inspect the OCV filter screen for clogs. Remove it, clean with brake cleaner, or replace if damaged.
8. If the filter is clean and the code persists, the issue may be with the VVT camshaft gear actuator, the timing chain, or the wiring, which may require professional diagnosis with a tool like Toyota's Techstream.

Parts You'll Likely Need

• Engine Variable Valve Timing (VVT) Solenoid / Oil Control Valve (OEM #15330-0P020 (or 15330-31020, check by VIN)) — This is the most common failure point for code P0024 on the 2GR-FE engine. It gets clogged or fails electrically, preventing correct camshaft timing adjustment.
  Trusted brands: Denso (OEM supplier), Aisin, Dorman
  OEM price range: $70-$90
  Aftermarket price range: $40-$60
• Oil Control Valve Filter (OEM #15678-31010) — This small screen protects the OCV from debris. If it gets clogged with sludge, it can starve the VVT system of oil pressure, causing timing codes. It's cheap and easy to replace while servicing the OCV.
  Trusted brands: Toyota
  OEM price range: $5-$15
  Aftermarket price range: $5-$10

Related Codes That Often Appear With This One

• P0014 — This is the equivalent code for the Bank 1 exhaust camshaft. If you swap OCVs for diagnosis and this code appears, it confirms the OCV is the problem.
• P0025 — This code is for 'Timing Over-Retarded' on the same camshaft (Bank 2 Exhaust). Seeing both may indicate an erratic OCV or a more serious mechanical issue with the VVT actuator.
• P0017, P0018 — These are camshaft/crankshaft correlation codes. TSB T-SB-0094-09 Rev1, which addresses faulty VVT gear actuators, also lists these codes as potential companions to P0024.

Technical Service Bulletins (TSBs) & Recalls

• T-SB-0094-09 Rev1: Addresses a ticking noise and various VVT codes (P0014, P0015, P0024, P0025, P0017, P0018) on 2005-2009 2GR-FE engines, potentially pointing to a faulty VVT-i gear actuator.
• LSC 90K: A Limited Service Campaign to replace the rubber Bank 1 VVT-i oil line with an all-metal version on 2006-2009 models 🎬 Watch: Step-by-step guide to replacing the critical VVT oil line to prevent oil rupture.

Platform-Specific Known Issues

• A Limited Service Campaign (LSC 90K) was issued by Toyota for 2006-2009 RAV4s with the 2GR-FE engine to replace a rubber VVT-i oil supply line for Bank 1 that could degrade and rupture, causing sudden and catastrophic oil loss. The replacement part is an all-metal line (Part No. 15772-31030). While this affects the Bank 1 VVT system, it underscores the sensitivity of the entire VVT system to oil supply issues. Many vehicles may still have the original rubber line if the service was not performed.
• Toyota issued Technical Service Bulletin T-SB-0094-09 Rev1 for some 2006-2009 2GR-FE engines that exhibited a ticking noise and VVT codes, including P0024. The TSB points to a potential issue with the VVT-i gear actuator itself, but this is a complex repair and should only be considered after ruling out simpler causes like the OCV and oil.

Mechanic-Grade Diagnostic Values

• Oil Control Valve (OCV) / VVT Solenoid Resistance — expected: 6.9 to 7.9 Ohms at 20°C (68°F). Failure: A reading outside this range, or an open circuit (infinite resistance), indicates a failed solenoid coil.
• OCV Power Supply Voltage (at connector, key on) — expected: Battery voltage (approx. 12V). Failure: No voltage indicates a problem with the power supply from the main relay or a break in the harness.
• Camshaft Position Sensor Voltage (Live Data) — expected: Typically 0.5V to 4.5V. Failure: A consistently high or erratic voltage can indicate a sensor fault, tricking the ECM into setting a timing code.
• VVT System Response (Live Data) — expected: The difference between target and actual exhaust valve timing should be less than 5° of Crankshaft Angle (CA).. Failure: A difference greater than 5°CA that persists for more than 5 seconds will trigger the fault code.

Scan Tool Commands That Help

• Toyota Techstream: Active Test: 'Control the VVT System (Bank 2)' or 'VVT_E(B2)' — This bidirectional command allows the technician to manually activate the Bank 2 exhaust OCV while the engine is idling. A functional OCV and actuator will cause the engine to hesitate or run rough. If there is no change in engine operation, it points to a stuck OCV, clogged oil passage, or a failed VVT actuator.
• Toyota Techstream: Utility: 'All Readiness' — After a repair, this function can be used to check the status of the VVT system monitor without having to perform a full drive cycle. It helps confirm if the fix was successful.

Wiring & Ground Locations

• Engine Harness Ground (Bank 2 side) — On the front cylinder head (Bank 2), on a boss underneath the intake plenum area.. A poor ground connection for the main engine harness can introduce electrical noise and voltage drops, potentially affecting the signals to and from the OCV and other sensors on that bank.
• Valve Cover Grounds — The 2GR-FE has ground wires attaching from the valve covers to the chassis, typically near the strut towers.. While not directly for the OCV, these grounds are critical for overall engine sensor stability. A loose or corroded ground here can cause a variety of difficult-to-diagnose electrical issues.
• OCV Connector (Bank 2 Exhaust) — On the front (radiator side) valve cover. It's a 2-pin connector. Pin 1 is typically the ECM control wire (OC2-), and Pin 2 is the power supply (OC2+).. This is the direct connection point for testing voltage, resistance, and inspecting for corrosion or damage that would cause the P0024 code.

Real Owner Repair Stories

• RAV4World Forum User (2007 Toyota RAV4 V6) — Check Engine Light with code P0024.
  ❌ Tried (didn't work) Replaced the Bank 2 exhaust OCV (VVT solenoid).
  ✅ What actually fixed it The OCV filter (strainer) for the Bank 2 exhaust OCV was completely clogged with sludge. After removing the 10mm bolt holding the filter housing and cleaning the mesh filter with brake cleaner, the code was cleared and did not return.
• Toyota Nation Forum User (2008 Toyota Sienna with 2GR-FE engine) — Check Engine Light, P0024, rough idle, and hesitation.
  ❌ Tried (didn't work) Oil and filter change., Swapping the Bank 1 and Bank 2 exhaust OCVs (code remained P0024).
  ✅ What actually fixed it The issue was a completely clogged Bank 2 exhaust OCV filter. The user noted that even though the OCV itself was functional, no oil could get to it. Cleaning the filter resolved all symptoms.

OEM Part Supersession History

• 15330-31020 → 15330-0P020 — Standard part number consolidation and potential minor internal revisions by the manufacturer.
  Heads up: Both part numbers are generally interchangeable for this application, but it is always best practice to verify the correct part number by VIN with a Toyota dealer.

Model Year Variations Within This Range

• 2006-2009: Early 2GR-FE engines were equipped with a rubber section on the Bank 1 VVT-i oil supply line, which was prone to rupture (LSC 90K). While this directly impacts Bank 1, it highlights a known weakness in early engine versions. By 2010, this was updated to an all-metal line from the factory.
• 2006-2009: These earlier model years are specifically called out in TSB T-SB-0094-09 Rev1 for potential VVT-i gear actuator failures, which can cause P0024 among other codes. Later models are less prone to this specific failure mode.

Diagnostic Flowchart

Other Known Issues on This Vehicle

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

• VVT-i Oil Line Rupture 🔴 High — Common on unrepaired 2006-2009 models. The original rubber hose degrades over time and can burst without warning, causing rapid oil loss and catastrophic engine failure. (Ref: LSC 90K)
• Water Pump Failure 🟠 Medium — A known weak point on the 2GR-FE. Pumps, especially on earlier models (pre-2010), can start leaking coolant. Replacement is labor-intensive and can cost over $1,000 at a shop.
• Intermediate Steering Shaft Clunk 🟡 Low — A common annoyance where a clunking or knocking noise is heard and felt in the steering wheel when turning at low speeds. Caused by worn U-joints in the intermediate shaft. It is generally considered a non-safety issue but is very noticeable.
• Melting / Sticky Dashboard 🟡 Low — In hot, high-sun climates, the dashboard material on some Toyota models from this era can degrade, becoming shiny, sticky, and soft. This can cause a dangerous glare on the windshield. Toyota offered a warranty enhancement program for this on some vehicles. (Ref: Warranty Enhancement Program (ZE6/ZLD))

Used vs. New Parts: Buying Guide for This Vehicle

When a used part is the smart pick: A used Oil Control Valve (OCV) from a reputable salvage yard can be a cost-effective option, as they are durable components when not subjected to oil sludge. Given the ease of access, the risk of a bad used part is low, as swapping it again is not a major job.

Donor-vehicle mileage cap: roughly under 120000 miles for the part to have meaningful remaining life.

What to inspect on the donor part:

• Ask for the VIN of the donor vehicle to check its service history for regular oil changes, if possible.
• Inspect the OCV's mesh screens for any signs of sludge or metallic debris before purchasing.
• Ensure the connector pins are clean, straight, and free of corrosion.

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

• VVT-i Camshaft Gear Actuator. Due to the high labor cost to replace this part and the potential for internal wear, using a new OEM (Toyota) or OEM-supplier (Aisin) part is strongly recommended to avoid repeat failure.

Aftermarket brands forum-validated for this vehicle:

• Denso (OEM supplier for the OCV)
• Aisin (OEM supplier for many engine components)

Brands owners have reported issues with on this vehicle:

• Ultra-cheap, unbranded OCVs from online marketplaces have a high rate of premature failure or being dead-on-arrival. Sticking to known brands is worth the small price difference.

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 — The Bank 1 equivalent of P0024; often appears if a faulty Bank 2 OCV is swapped to Bank 1 during diagnosis.
• P0015 — Related VVT code cited in T-SB-0094-09 Rev1 regarding camshaft timing and actuator issues on the 2GR-FE.
• P0025 — The 'retarded' timing companion code for Bank 2 exhaust camshaft, often caused by the same OCV or oil pressure issues.
• P0017 — Camshaft/Crankshaft alignment code mentioned in T-SB-0094-09 Rev1 as potentially related to VVT-i gear actuator failure.
• P0018 — Bank 2 Camshaft/Crankshaft correlation code cited alongside P0024 in technical bulletins for this engine.

Frequently Asked Questions