What does fault code P0015 mean?
The P0015 fault code, applicable to all car manufacturers, means “B Camshaft Position – Timing Over-Retarded (Bank 1)“.
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 P0015 fault include incorrect timing of the B intake/left/front camshaft, mechanical jamming of the camshaft due to over-timing, or the actuator valve being stuck in the open position. In short, it’s over-timing. The “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 P0015 Error Code
- Unstable engine idle
- Reduced power and poor acceleration
- Increased fuel consumption
- Difficulty starting the engine
- Check engine light illuminates
Main Causes of P0015 Error Code
- Engine oil contamination or lack of oil
- Faulty VVT solenoid valve
- Faulty or worn camshaft position sensor (CMP)
- Faulty phase shifter actuator (VANOS, CVVT, etc.)
- Timing belt or chain problems
- Control circuit malfunction (wiring, connectors)
P0015 Error Code in Different Vehicles
P0015 in BMW: In BMW vehicles (especially those with N46 and N52 engines), the P0015 error is usually related to oil contamination and VANOS system malfunction. Frequent oil changes and solenoid valve checks are necessary.
P0015 in Toyota: For Toyota, this error is usually caused by a clogged VVT valve. It’s crucial to use only high-quality engine oil and pay close attention to replacement intervals.
P0015 in Mercedes-Benz: In Mercedes-Benz models with M272/M273 engines, the P0015 code may indicate a problem with the balance shaft or timing chain. Diagnosis requires special tools.
P0015 in Hyundai/Kia: In Hyundai and Kia models, the P0015 error is usually caused by a faulty CVVT valve or a stretched timing chain.
P0015 in Nissan: For Nissan, the error may be due to a faulty camshaft position sensor or solenoid valve. Diagnosis is performed using standard methods.
How to Diagnose P0015 Error Code?
Step 1: Connect an OBD2 diagnostic scanner and read the P0015 error code.
Step 2: Check the engine oil level and condition.
Step 3: Check the wiring and connectors related to the VVT system.
Step 4: Check the VVT solenoid valve and camshaft sensor.
Step 5: If necessary, perform a mechanical valve timing check.
| Possible Causes | How to Check？ |
|---|---|
| Low or dirty engine oil | Check engine oil level and condition |
| Faulty VVT solenoid valve | Test resistance, replace if necessary |
| Camshaft position sensor | Check signal with a scanner, visual inspection |
| Timing chain/belt issues | Check phase, tension, or shearing |
| Damaged wiring or connectors | Visual inspection, multimeter check |
Tools needed: OBD2 diagnostic scanner, multimeter, oscilloscope (for advanced diagnostics), wrench set, dipstick
How to fix P0015 error code? (Solutions to the problem)
Simple solutions
- Change engine oil and oil filter
- Reset the error code after maintenance
- Check and clean the VVT solenoid valve
In-depth diagnostic and repair solutions
- Replace the phase control solenoid valve (if defective)
- Check and adjust timing phase (belt/chain)
- Replace the camshaft position sensor
- Repair or replace wiring and connectors
| Symptoms | Possible solutions |
|---|---|
| Poor engine starting | Check camshaft sensor and VVT system |
| Increased fuel consumption | Check timing and change oil |
| Engine runs roughly/vibrates | Check and replace VVT solenoid valve |
P0015 Error Frequently Asked Questions
Is it possible to drive with a P0015 error?
It is recommended to clear the error as soon as possible, as prolonged use with a camshaft position error can lead to decreased engine performance and accelerated engine wear.
Could the P0015 error be due to poor oil quality?
Yes, using dirty or unsuitable engine oil can clog the VVT system and trigger the error.
How do I reset the P0015 error after fixing it?
Once the cause of the error is resolved, it can be reset using a car scanner or by disconnecting the battery for 10-15 minutes.
What happens if I ignore the P0015 error?
Ignoring it can lead to decreased engine performance, increased fuel consumption, and even damage to the valve timing system.
Will the P0015 error reappear after fixing it?
Yes, if the repair is incomplete, or if only the consequences were addressed, not the root cause of the problem.
Related OBD2 Errors:
P0010 – A Camshaft Position Actuator Circuit/Open (Bank 1))
P0011 – A Camshaft Position – Timing Over-Advanced or System Performance (Bank 1)
P0022 – A Camshaft Position – Timing Over-Retarded (Bank 2)
Important! Even if the engine is running normally, the presence of a P0015 code indicates that the engine is not operating optimally. This affects the durability of components and increases the risk of more serious malfunctions. Regularly change the engine oil and only use fluids recommended by the manufacturer. This extends the life of VVT components and reduces the risk of errors such as P0015. If an error occurs, do not delay diagnosis – addressing the problem promptly can prevent expensive repairs.