P2CF9
- Powertrain
- Manufacturer-specific
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Driving may cause further damage or leave you stranded. Arrange service promptly rather than waiting.
Belt Integrated Starter Generator Belt Tensioner Control Circuit/Open
This code is in our catalogue but has not yet been through editorial review, so the guidance below is limited to what our structured data supports. We publish deeper diagnostic content only after a code has been reviewed — here is why.
The control circuit of the belt-integrated starter/generator (BISG) belt tensioner reports a control circuit/open condition. Belt tension cannot be modulated for assist/regen modes.
A trouble code records what a control module measured. It does not identify which part failed. Test before replacing anything.
- Safe to drive
- Driving may cause further damage or leave you stranded. Arrange service promptly rather than waiting.
- Urgency
- Get it looked at now
- Will it pass emissions
- Not affected
- Check engine light
- Solid
| # | Cause | How often | Component |
|---|---|---|---|
| 1 | Open in tensioner control wire | Very common | — |
| 2 | Open tensioner actuator | Common | — |
| 3 | Pin pushed back out of connector body | Occasional | — |
Ordering reflects how often each cause is responsible in general, not a probability for your vehicle. Confirm by testing.
- Bisg Belt Tensioner
- Wiring Harness
- Hybrid Control Module
- Definition
- Generic code set (SAE J2012 / ISO 15031-6) via the OBDexopen database, dedicated to the public domain under CC0-1.0.
- Diagnostic guidance
- Written and reviewed in-house. See our editorial policy.
- Review status
- Awaiting review
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