P3497Cylinder Deactivation System Bank 2
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P3497 is the bank 2 counterpart of P3400: the control unit concludes that deactivation on the bank that lacks cylinder 1 is failing as a whole, and it blames no single cylinder circuit. Honda's VCM V6 links it to rocker arm oil pressure switch C (P3400 belongs to switch B); bulletin 13-055 for the 2013 Odyssey and Pilot shows both codes after cold starts with oil pressure above 92 psi, which moved the spool valves and cut cylinders the ECU had not selected. The fix there was a new relief valve spring. Ram lists P3497 for the 2023 5.7 l Hemi eTorque and cures it with PCM software (18-002-25). Expect a warning lamp, misfire codes and rough running during warm-up.
- What you may notice
- Check engine lamp on
- Misfire codes on bank 2 cylinders, mostly after a cold start
- Rough idle while the engine warms up
- Reduced-cylinder mode no longer used, higher fuel use
- Likely causes
- LikelyLow oil level, wrong grade or overdue oil change on bank 2
- PossibleExcess oil pressure on cold start, e.g. weak relief valve spring
- PossibleSwitchable rocker arm or lifter on bank 2 sticking or not latching
- RareRocker arm oil pressure switch of bank 2 reporting wrongly
- RareEngine control software needing an update
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €80 – €4,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.