FAQ
TL;DR: A 17‑post thread (2017–2024) traces Peugeot 207 1.6 VTi stalling and no‑start to VVT/valvetronic setup and adaptation; “I decided to replace the motor and the valvetronic sensor.” [Elektroda, marekfiesta, post #16901887]
Why it matters: This FAQ helps DIYers and techs fix rough idle, stalling, and fault codes after valvetronic/VVT work on the 1.6 VTi.
Quick Facts
- Reported fault codes: P1030, P1062, P101A, P1025 on 1.6 VTi. [Elektroda, marekfiesta, post #16901887]
- Timing chain stretch is a common failure noted by mechanics. [Elektroda, milejow, post #16901898]
- Valvetronic actuator referenced: VDO A2C59515108 for cam/valve lift control. [Elektroda, marekfiesta, post #16901981]
- Motor must be set to a mid/halfway position before adaptation. [Elektroda, kubas10, post #20515748]
- After correct mechanical setup, run computer adaptation/initialization (Proxia/DiagBox). [Elektroda, coperfild, post #20535221]
What do codes P1030, P1062, P101A, and P1025 mean on a 1.6 VTi?
They indicate variable valve timing/valvetronic issues and failed learning. On this engine, they appeared with stalling and no‑start. Replacing the valvetronic motor and sensor cleared P1030/P1062, but learning errors P101A/P1025 remained until proper setup and adaptation. [Elektroda, marekfiesta, post #16901887]
How do I position the valvetronic motor before adaptation?
Set the actuator to a mid/halfway position relative to the mechanism, then perform electronic adaptation with your diagnostic tool. This prevents end‑stop binding and failed initializations. As one tech notes, “Yes, it's supposed to be halfway done.” [Elektroda, kubas10, post #20515748]
Do I need to run adaptation after changing the valvetronic motor?
Yes. Install the motor correctly, then run adaptation in Proxia/DiagBox. Users report that after correct mechanical setup, software settings complete and the system works normally. Skipping this step leaves learning errors. [Elektroda, coperfild, post #20535221]
Is chain stretch a known cause of rough idle or stalling on the 1.6 VTi?
Yes. Mechanics in the thread flag the timing chain as a commonly stretching component. Chain elongation upsets cam phasing, which can mimic or worsen valvetronic faults, leading to idle instability. Inspect chain condition before repeated adaptations. [Elektroda, milejow, post #16901898]
Which actuator part is referenced for this engine?
The thread cites a VDO variable cam/valve lift adjuster, part A2C59515108, used in BMW/Mini‑derived systems. Matching the correct unit is critical before attempting adaptation or telecoding. [Elektroda, marekfiesta, post #16901981]
How is the valvetronic motor assembled—any trick to it?
Assembly is straightforward: fit the motor, align it correctly, then run adaptation. A contributor summarizes it as “motor normally no philosophy there then adaptation.” Ensure mechanical timing and chain condition are sound before software steps. [Elektroda, chiki-chan, post #19143185]
What about the ‘4 teeth from position 0’ tip—should I use it?
No. The author later retracted that guidance and confirmed it was wrong. Treat any fixed‑tooth rotation advice with caution; use the halfway positioning plus proper adaptation instead. This prevents misalignment and repeat errors. [Elektroda, kubas10, post #19185952]
Does the motor position relate to the intermediate shaft or cam?
Yes. Users asked specifically about the intermediate shaft position. The reliable guidance is to set the valvetronic mechanism to its halfway travel relative to the shaft before adaptation. This centers the range for learning. [Elektroda, kubas10, post #20515748]
What tool or menu do I need for telecoding/parameters?
Use your PSA tool (Proxia/DiagBox) to find the relevant telecoding parameter and execute the guided learning procedure. Telecoding ensures the ECU recognizes the actuator’s position and limits after installation. [Elektroda, diagautob27, post #21123012]
Could a cylinder head or roller issue also cause these symptoms?
Yes. A tech notes the VTi can suffer chain, head, or roller faults—sometimes more than one at once. Diagnose mechanically first, then perform adaptation; software will not mask hard faults. [Elektroda, chiki-chan, post #19143185]
What is valvetronic on the 1.6 VTi?
It’s a variable valve lift system actuated by an electric motor and mechanism. The cited VDO A2C59515108 adjuster changes valve lift, working alongside cam phasing for efficiency and idle control. [Elektroda, marekfiesta, post #16901981]
What is Proxia/DiagBox in this context?
They are PSA diagnostic suites used to initialize, adapt, and telecode components. After correct mechanical setup, running adaptation in the software restores proper idle and starts. “As everything works, just make settings with a computer.” [Elektroda, coperfild, post #20535221]
How do I perform a quick adaptation after replacing the motor?
- Set the valvetronic mechanism to its halfway position and install the motor.
- Verify timing chain condition and base timing; correct if off.
- In Proxia/DiagBox, run the valvetronic learning/adaptation procedure to completion.
[Elektroda, coperfild, post #20535221]
Why do learning codes persist after replacing parts?
Learning fails if the mechanism isn’t centered, timing is off, or the chain is stretched. Replace parts only after confirming base timing and then re‑run adaptation. Part swaps alone won’t clear learning errors. [Elektroda, marekfiesta, post #16901887]
Any edge cases I should watch for during setup?
Avoid fixed ‘tooth count’ positioning advice. One user proposed a 4‑tooth offset, then withdrew it as incorrect. Use the halfway method and software learning instead to prevent damage and repeat faults. [Elektroda, kubas10, post #19185952]
Does software alone fix stalling without mechanical checks?
No. Contributors stress verifying the chain, head, and rollers first. Only then will adaptation succeed and stalling resolve. Software cannot compensate for worn mechanical components. [Elektroda, chiki-chan, post #19143185]
