What is the error code P0024?
The P0024 fault code, applicable to all car manufacturers, means “B Camshaft Position – Timing Over-Advanced or System Performance (Bank 2)“.
Background Information: The camshaft controls the opening and closing of the valves. In a variable valve timing system, the electronic camshaft adjusting valve (or oil control valve, OCV) adjusts the camshaft angle by changing the oil pressure to the camshaft adjuster (mechanical) according to instructions from the engine control module (ECM), ensuring the valves open and close at the optimal time. Causes of the P0024 fault include incorrect timing of the B exhaust/right/rear camshaft, mechanical jamming of the camshaft due to over-timing, or the actuator valve being stuck in the open position. In short, it’s either timing too early or system performance issues. “B” camshaft must be the “exhaust,” “right,” or “rear” camshaft. Determine left/right and front/rear from the driver’s position with a forward view. The first group refers to the group including cylinder 1, and the second group is the group opposite the first group.
Symptoms of P0024 Error Code
The P0024 error may be accompanied by several signs indicating a problem with the valve timing system:
- Unstable engine idle
- Loss of power and reduced throttle response
- Increased fuel consumption
- Difficulty starting the engine
- Increased emissions
- Engine check light illuminated
- Engine may enter limp mode
Main Causes of P0024 Error Code
- Faulty Variable Valve Timing (VVT) valve
- Blocked or contaminated oil passages
- Low or poor quality engine oil
- Damaged or faulty camshaft position sensor (CMP)
- Irregular electrical wiring or connectors related to the VVT
- Engine Control Module (ECM) malfunction
P0024 Error Code in Different Vehicles
P0024 in BMW: In BMW vehicles equipped with N52 and N62 engines, the P0024 error is often associated with clogged oil passages in the VANOS system. A faulty VVT solenoid is also possible.
P0024 in Mercedes-Benz: For models equipped with M272 and M273 engines, the error may be caused by improper balance shaft operation or oil contamination. Phase and timing checks are necessary.
P0024 in Ford: In Ford vehicles with Ecoboost engines, the P0024 error occurs when oil pressure is low or the oil control valve (OCV) fails. Pressure checks and valve replacement are recommended.
P0024 in Toyota: In V6 and V8 engines with VVT-i, the P0024 error may be caused by wear in the camshaft adjustment system or contamination of the oil passages. Using the recommended oil is crucial.
P0024 in Hyundai/Kia: In Theta II engines, the P0024 error is usually caused by a faulty CVVT solenoid. The phase may also be incorrectly set after timing adjustments.
How to diagnose the P0024 error code?
Step 1: Read the error code with an OBD2 diagnostic scanner
Step 2: Check engine oil level and quality
Step 3: Visually inspect the VVT valve and its connector
Step 4: Measure the VVT solenoid resistance and sensor signal
Step 5: Compare the data with vehicle specifications
Possible Causes and Diagnostic Methods
| Possible Cause | How to Check？ |
|---|---|
| Low or contaminated oil | Check oil level and condition, replace if necessary |
| Faulty VVT valve | Check resistance, voltage response, replace if necessary |
| Clogged oil filter or passages | Visual inspection, flush the lubrication system |
| Faulty camshaft position sensor | Multimeter diagnosis, compare signal to standard |
| Power outage or short circuit | Check connectors, wiring harness and wiring, repair damage |
| Electronic countermeasures failure | OBD2 scanner diagnosis, reflashing or replacement |
Tools Needed: Car fault code reader, multimeter, a set of disassembly tools, new engine oil and filter, engine technical documentation
How to Fix P0024 Error Code? (Solution to the Problem)
Simple Repair Methods
- Engine oil and filter replacement
- Variable Valve Timing (VVT) valve cleaning
- Reset error after addressing the cause
- Check and restore connectors and wiring
In-depth Diagnostic and Repair Solutions
- Replace the faulty VVT valve
- Flush the lubrication system and oil supply passages
- Camshaft Position Sensor (CMP) replacement
- Timing synchronization check
- Engine Control Module (ECM) upgrade or replacement
Troubleshooting by Symptoms
| Symptom | Possible Solution |
|---|---|
| Power outage | Check VVT and clean or replace the valve |
| Engine misfire | Camshaft position sensor diagnosis |
| Increased fuel consumption | Clean the lubrication system, check phase angle |
| Check engine light on | Count and reset errors, eliminate the root cause |
| Engine mechanical noise | Check phase synchronization, timing chain wear is possible |
P0024 Error Frequently Asked Questions
Can you drive with a P0024 error code?
Not recommended. This error can lead to incorrect valve timing causing serious engine damage.
Will the P0024 error disappear on its own?
Sometimes the error disappears after restarting the engine, but this does not mean the problem is solved. Diagnosis is necessary.
What happens if I ignore error P0024?
Ignoring it can lead to decreased performance, increased fuel consumption, and even damage to the camshaft or timing gears.
Can changing the oil fix this error?
Yes, if the cause is contamination or insufficient oil. However, if the problem lies with the VVT valve or sensor, additional repairs will be needed.
Do I need to go to a car service to clear P0024, or can I handle it myself?
You can perform basic checks yourself (oil level, connectors, error scanning). However, for in-depth VVT diagnostics and repair, it’s best to contact a specialist.
Related OBD2 Errors
P0011 – A Camshaft Position – Timing Over-Advanced or System Performance (Bank 1)
P0012 – A Camshaft Position – Timing Over-Retarded (Bank 1)
P0021 – A Camshaft Position – Timing Over-Advanced or System Performance (Bank 2)
Important! If error P0024 is accompanied by mechanical noise from the engine compartment, you must stop using the vehicle immediately. This may indicate serious damage to the VVT or timing components. Do not delay diagnosis. Even if the error temporarily disappears, it’s important to check the VVT system, oil level, and condition. This will help avoid serious malfunctions and expensive repairs in the future.