A 2015 Peugeot 208 I rolled in with a check engine light and a single P0014 fault code, pointing straight to an over-advanced exhaust camshaft. The technician wrote “motorlampan lyser” on the job card, a common enough complaint, but on the 1.2 PureTech (EB2/HMZ) engine, this specific code demands a structured look at the entire oil control system. I want to walk through how our diagnostic platform ranked the causes for this exact job and the testing path it provided.
The primary suspect is the VVT solenoid
The diagnostic engine ranked a sticking or defective exhaust camshaft timing solenoid (the VVT valve) as the most likely fault, giving it a 40 percent probability with a medium severity rating. On the Peugeot 1.2 PureTech, the exhaust camshaft phase angle is regulated by oil pressure controlled by this magnetic valve.
If the internal slider of the solenoid sticks, or if its fine mesh screens become clogged with oil sludge or rubber particles, the valve can get stuck in an open or partially activated position. This keeps the exhaust camshaft in an over-advanced state compared to the target value requested by the engine control module, which directly triggers the P0014 code.
The recommended diagnostic steps start with the electrical side. The technician needs to measure the coil resistance on the exhaust camshaft magnetic valve using a multimeter. Following that, an activation test of the VVT solenoid is required, either via a scan tool actuator test or by applying an external 12V signal to verify mechanical movement. Finally, the solenoid must be removed for a visual inspection of the integrated mesh filters to check for sludge and particles.
The underlying threat of the wet timing belt
While the solenoid is the direct actuator, the platform ranked oil system contamination from a degraded timing belt as the second most likely cause at 25 percent, carrying a high severity warning. The EB2 engine utilizes a timing belt that runs in an oil bath. Over time, chemical degradation from fuel and oil exposure can cause the belt material to break down and fray.
When this happens, the belt sheds rubber particles directly into the engine oil. These remnants get sucked into the oil system, clogging the oil pump suction strainer as well as the oil galleries and the VVT solenoid screens. This restriction causes a drop in flow capacity and oil pressure, leaving the camshaft phaser unable to regulate the exhaust camshaft back to its base position in time.
Testing for this requires checking the width and condition of the timing belt through the oil filler cap using the specific PSA special gauge. If belt degradation is suspected, the oil pan must be removed to visually inspect the oil pump strainer. The mechanic should also measure the dynamic oil pressure with a gauge while the engine is warm.
Mechanical phaser failures
The third ranked cause, at a 15 percent probability and medium severity, is a mechanical fault or sticking exhaust camshaft phaser. This VVT gear is a hydraulic unit that rotates the camshaft relative to the drive sprocket based on oil pressure.
If the internal locking pin of the phaser sticks, the spring fails, or the internal chambers wear out or become blocked, the phaser will stick in the advanced position and fail to return to its normal retarded state. This creates a permanent or prolonged deviation between the requested and actual position on the exhaust side. To confirm this, the technician should log live data of the actual and target values for the exhaust camshaft angle while revving the engine. A mechanical check of the lock position on the phaser with the valve cover removed is also necessary.
Ruling out the sensor
Finally, the platform assigned a 10 percent probability to a faulty signal or defective exhaust camshaft position sensor, rating it as low severity. This sensor reads the exact position of the camshaft using the Hall effect.
Thermal drift, internal circuit faults, poor contact, or contamination of the reading surface with metal and oil particles can distort the signal. The engine control module might then register the camshaft as being too advanced even if the physical timing is correct. The testing path here involves using an oscilloscope to check the camshaft signal waveform and edges against the crankshaft signal. The technician must also verify the 5V or 12V reference voltage and ground connection at the sensor plug, and remove the sensor to inspect the nose for damage or debris.
Following the evidence
When a P0014 code appears on an EB2 engine, clearing the code and swapping a sensor is rarely a permanent fix. Do you find your shop checking the wet belt first on these 1.2 PureTech engines, or do you start with the solenoid actuation?
Reference pages for the codes in this article
- P0014, what we measure for this code across real diagnostics
