P0024 — "B" Camshaft Position - Timing Over-Advanced or System Performance (Bank 2)

P0024 — "B" Camshaft Position - Timing Over-Advanced or System Performance (Bank 2). A fault in the camshaft position and variable valve timing. Short, gentle driving to a shop is usually possible. Typical causes: low or dirty engine oil affecting VVT, stuck or clogged VVT oil control valve (OCV), damaged sensor wiring or reluctor ring.

powertrain (engine/transmission)

Is it safe to drive?

Limited driving may be possible If oil pressure is normal, severe shaking or rattling is absent, and power remains stable, a short trip to a repair facility may be reasonable. Stop driving if the engine loses substantial power, shakes violently, or produces an oil-pressure warning.

Typical symptoms

The check-engine light may illuminate with P0024 stored in the powertrain controller.
The engine may hesitate, stumble, or respond slowly during acceleration.
Rough or unstable idle operation can occur when the Bank 2 cam position varies unexpectedly.
Reduced engine power or a noticeable performance drop may be present, particularly under load.
A rattling sound near the Bank 2 cam-cover area, especially during cold starts, can accompany phaser or oil-control problems.

Common causes

Low, contaminated, or incorrect-viscosity engine oil reducing control pressure to the Bank 2 cam phaser.
A failed or sticking Bank 2 cam-timing control valve, solenoid, or vacuum actuator unable to maintain the commanded advance.
Restricted or damaged oil-feed passages to the Bank 2 camshaft and phaser, commonly involving sludge or debris.
Worn cam phaser, timing chain, or excessive timing-chain lash causing the Bank 2 cam position to vary beyond the expected range.
Open wiring, a poor connector, or loss of the control reference for the Bank 2 cam-timing actuator.
A camshaft-position signal fault or out-of-range adaptive timing value following cam, chain, or actuator replacement.

How to diagnose with an OBD scanner

Confirm P0024 and capture related data Connect an AIScanAuto-compatible OBD2 scanner or ELM327 reader and check stored, pending, and permanent codes. Record the P0024 freeze-frame data and look for related cam-timing, oil-control, or oil-pressure codes before clearing anything.
Inspect oil and the Bank 2 control hardware Verify the engine oil level, condition, and specified viscosity. Inspect the Bank 2 cam-cover area for leaks, damaged wiring, loose connectors, or a disconnected vacuum line if the timing actuator uses vacuum.
Test the cam-timing actuator Using model-specific wiring information, check power, ground, connector integrity, and actuator resistance or current draw. Actuate the Bank 2 control device and confirm that the cam phaser can advance and hold position; an electrical test alone may not reveal a slipping phaser.
Check lubrication, timing, and position feedback Perform the specified oil-pressure and mechanical-timing checks, inspect the chain, guides, tensioner, cam sprocket, and phaser, and verify Bank 2 camshaft-position data against commanded timing where the scan tool supports live cam-angle data.
Repair, relearn, and validate the correction Correct the oil condition, clear blocked passages, repair wiring, or replace the failed actuator or worn timing components. If supported, use the manufacturer scan procedure to reset adaptive cam timing, then road-test and confirm that P0024 does not return.

Approximate repair cost

Typical independent-shop estimates for P0024 are approximately USD 125–300 for diagnosis, USD 300–900 for an accessible Bank 2 control valve, solenoid, or related service, and USD 900–2,500 for internal cam-phaser, chain, or lubrication repairs. Figures are estimates and vary by region, vehicle, and parts availability.

Common questions

Does P0024 mean the timing belt or chain definitely slipped?

No. P0024 means the controller detected excessive Bank 2 cam advance or system performance outside the expected range. A worn chain, failed actuator, poor oil control, or sensor fault can all produce it.

Can I continue driving with P0024?

Limited driving may be possible if the engine runs smoothly and oil pressure is normal, but the fault can affect power and exhaust-system performance. Repair it promptly and avoid continued operation if severe symptoms develop.

Will clearing the P0024 code fix the problem?

No. Clearing the code only erases the stored fault and may reset related adaptive values. The underlying oil, actuator, wiring, timing, or sensor fault must be corrected before the code is meaningful.

Which camshaft is identified by P0024?

P0024 identifies the timing-control circuit or cam-position system on Bank 2, the bank opposite Bank 1. Confirm the engine's cylinder and bank layout before locating the actuator, phaser, or sensor.

When your vehicle's engine control unit detects that the camshaft timing on Bank 2 has moved beyond its intended range, it sets trouble code P0024. This diagnostic code specifically flags the "B" camshaft as running over-advanced or indicates a broader system performance issue with the variable valve timing mechanism. The Powertrain Control Module continuously evaluates camshaft position sensor data against expected values throughout the drive cycle, and when readings deviate far enough from factory specifications for enough consecutive cycles, P0024 gets stored and the Check Engine lamp illuminates.

Bank 2 refers to the engine bank that does NOT contain cylinder number one. Since cylinder numbering and bank orientation vary between manufacturers and even between engine variants within the same brand, you must consult your specific service documentation to identify which cylinder head comprises Bank 2 before beginning any diagnostic work or parts replacement.

The freeze frame data accompanying P0024 is invaluable—it records engine RPM, load percentage, coolant temperature, vehicle speed, and other parameters at the exact moment the fault triggered. This snapshot gives you the precise operating conditions to reproduce during testing, making diagnosis far more targeted than chasing a code blindly.

Watch for these indicators when P0024 may be active:

Check Engine Light remains illuminated
Noticeable reduction in engine power and responsiveness
Fuel economy drops noticeably compared to your normal driving patterns
Extended cranking time before the engine fires
In severe cases, the engine refuses to start at all
Rough idle with stumbling or hesitation, particularly at low RPMs

The most frequent culprits behind P0024 include insufficient or contaminated engine oil disrupting hydraulic VVT operation, a faulty oil control valve stuck in the wrong position, and wear in the camshaft phaser assembly itself. A jumped timing chain or belt can also produce this code by physically misaligning the cam gear relative to the crankshaft. Wiring and connector issues affecting the camshaft position sensor circuit occasionally trigger this code as well.

Follow this diagnostic sequence to pinpoint the root cause:

Connect a quality OBD2 scanner, retrieve P0024, and record all freeze frame data—this tells you exactly what the engine was doing when the failure occurred.
Scan for any additional diagnostic trouble codes that may be present. Codes related to the crankshaft position sensor, oil pressure, or other VVT components often point toward the primary fault. Check manufacturer TSB databases for known complaints or software updates affecting your specific make and model year.
Physically examine the wiring harness and electrical connectors feeding the camshaft position sensor and VVT oil control valve. Look for cracked insulation, corrosion buildup, broken lock tabs, or any signs of intermittent connection.
Assess the engine oil condition immediately—dark, sludgy oil or a low oil level directly impairs VVT function since these systems depend on precise hydraulic pressure. Change the oil and filter if contamination is evident before proceeding.
Monitor live data streams showing commanded versus actual camshaft position angle while gently revving the engine from idle to moderate RPM. A large discrepancy between target and actual values confirms a mechanical or hydraulic failure within the VVT system.
Clear P0024 after your inspection, then operate the vehicle through a complete drive cycle matching the freeze frame conditions. If the code returns, the underlying fault remains active and requires repair.

Symptoms of P0024

Check Engine Light remains illuminated
Noticeable reduction in engine power and responsiveness
Fuel economy drops noticeably compared to your normal driving patterns
Extended cranking time before the engine fires
In severe cases, the engine refuses to start at all
Rough idle with stumbling or hesitation, particularly at low RPMs

Common Causes

Insufficient or contaminated engine oil disrupting hydraulic VVT operation
Faulty VVT oil control valve stuck in the wrong position
Worn or failed camshaft phaser assembly
Timing chain or belt jumped out of synchronization
Damaged wiring or connectors in the camshaft position sensor circuit

How to Diagnose P0024

Connect a quality OBD2 scanner, retrieve P0024, and record all freeze frame data—this tells you exactly what the engine was doing when the failure occurred.
Scan for any additional diagnostic trouble codes that may be present. Codes related to the crankshaft position sensor, oil pressure, or other VVT components often point toward the primary fault. Check manufacturer TSB databases for known complaints or software updates affecting your specific make and model year.
Physically examine the wiring harness and electrical connectors feeding the camshaft position sensor and VVT oil control valve. Look for cracked insulation, corrosion buildup, broken lock tabs, or any signs of intermittent connection.
Assess the engine oil condition immediately—dark, sludgy oil or a low oil level directly impairs VVT function since these systems depend on precise hydraulic pressure. Change the oil and filter if contamination is evident before proceeding.
Monitor live data streams showing commanded versus actual camshaft position angle while gently revving the engine from idle to moderate RPM. A large discrepancy between target and actual values confirms a mechanical or hydraulic failure within the VVT system.
Clear P0024 after your inspection, then operate the vehicle through a complete drive cycle matching the freeze frame conditions. If the code returns, the underlying fault remains active and requires repair.

Repair Options and Costs

Resolving P0024 means addressing whatever component is causing the cam timing malfunction. The VVT oil control valve replacement typically runs between $200 and $500 including parts and labor at an independent shop. A faulty camshaft position sensor costs $120 to $350 to replace. If the timing chain or belt has jumped teeth or the chain itself is stretched, expect to pay $800 to $2,500 for repair depending on engine design and accessibility.

Always start with the least expensive possibilities—an oil change and filter, sensor testing, and wiring inspection—before committing to major engine work. Labor rates and parts prices vary by region and shop, so obtain written estimates from at least two qualified technicians before proceeding.

How Much Does Fixing P0024 Cost?

Your total repair bill hinges entirely on which component has actually failed. Based on independent shop labor rates and typical parts pricing in the United States, expect to budget anywhere from $120 for a simple sensor swap up to $2,500 for comprehensive timing chain replacement. The majority of P0024 cases resolve in the $200 to $500 range through VVT valve or sensor replacement. Getting an accurate diagnosis before purchasing parts is the single most effective way to control costs—assuming the worst-case scenario rarely saves money and often leads to unnecessary repairs.

Can You Drive With P0024?

Proceed with caution. A vehicle storing P0024 may experience drivability problems including hesitation, reduced power, and poor fuel economy. More seriously, if the timing chain has jumped or the phaser is completely stuck, continued operation on an interference engine risks catastrophic valve-to-piston contact. Have the vehicle diagnosed before any extended journey, and if you notice the engine running rough or the Check Engine light flashing, stop driving immediately to avoid potentially severe engine damage.