The Lemon IndexThe system that shuts off cylinders to save fuel has a fault on bank 1.
Get it fixed soon. A few more days of normal driving is usually OK, but waiting can turn a small repair into a bigger one or a breakdown.
Low or dirty oil. Then: failed deactivation solenoid; collapsed lifter.
Owners named P3400 in 22 complaints to the U.S. government, most often on the Honda Odyssey.
Models that report it most
Complaints that name P3400, by model. Raw counts, not a failure rate: popular models get more complaints. Tap a model for its years, mileage and what owners say fixed it.
P3400 by model: P3400 Honda Odyssey (10)
Years owners report it on most: 2010 Honda Accord · 2008 Honda Odyssey · 2010 Honda Odyssey
The details
What P3400 means
The system that shuts off cylinders to save fuel has a fault on bank 1. The engine can run rough or misfire.
Can I drive with P3400?
Get it fixed soon. A few more days of normal driving is usually OK, but waiting can turn a small repair into a bigger one or a breakdown.
41% of the owner complaints that name P3400 also say the car uses or leaks oil. A complaint can describe more than one problem, so this doesn't prove the code caused it.
Common causes of P3400
- Low or dirty oil
- Failed deactivation solenoid
- Collapsed lifter
A shop should confirm the cause with a scan and tests before replacing parts.
What owners describe
- Uses or leaks oil: 41% of complaints
- Shakes, runs rough or misfires: 18% of complaints
- Rattles or knocks: 9% of complaints
Share of complaints naming the code whose text also mentions each problem.
Model years that report P3400 most
2010 Honda Accord (5), 2008 Honda Odyssey (3), 2010 Honda Odyssey (2).
Related codes
Quick answers
What does P3400 mean?
Cylinder Deactivation System (Bank 1). The system that shuts off cylinders to save fuel has a fault on bank 1. The engine can run rough or misfire.
Can I drive with P3400?
Get it fixed soon. A few more days of normal driving is usually OK, but waiting can turn a small repair into a bigger one or a breakdown.
What causes P3400?
Low or dirty oil; Failed deactivation solenoid; Collapsed lifter.
Counts: NHTSA owner complaints whose text names P3400. A complaint is an owner's report, not a diagnosis. Meanings: the standard SAE J2012 definitions in our own words; manufacturer codes only where verified for that make. General information, not repair advice for your car.