P2090
Camshaft Position B Actuator Control Circuit Low (Bank 1)
Drive voltage to the exhaust VVT oil control valve on bank 1 is below the lower limit. Same failure pattern as P2088 but for the exhaust cam phaser.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: easy
Symptoms
- Check engine light on
- Power loss especially in mid-rpm range
- Possible rough idle or stalling
- Increased fuel consumption
Common causes
Ordered by how often each turns out to be the cause.
- Drive line shorted to groundCommon
- Exhaust VVT solenoid internally shortedPossible
- Connector pins corroded - high contact resistanceLess likely
Parts involved
- VVT Solenoid
- VVT Wiring
P2090 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.