P3400 on HONDA ODYSSEY — P34C8

Q: "What does P3400 mean on a HONDA ODYSSEY?"

"P3400 indicates: P34C8. This is a powertrain code. 10 HONDA ODYSSEY owners have reported this to NHTSA."

Q: "What are the most common causes of P3400 on HONDA ODYSSEY?"

"Based on 10 NHTSA reports, the most commonly cited components are: Engine, Steering,Unknown Or Other,Engine, Power Train. These percentages are based on the component field in owner complaints."

Q: "Is P3400 serious on my HONDA ODYSSEY?"

"Of 10 NHTSA reports for this code on HONDA ODYSSEY, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic."

Q: "What should I do if my HONDA ODYSSEY shows P3400?"

"1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare."

What P3400 Means on Your HONDA ODYSSEY

P3400 is a diagnostic trouble code indicating: P34C8. This code relates to the powertrain system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

10 HONDA ODYSSEY owners have reported this issue to NHTSA across model years 2008-2016. Most reports come from the 2008, 2010 model years. The most commonly reported component is Engine (70.0% of reports).

Real HONDA ODYSSEY Owner Reports

Source: NHTSA Complaints Database

"Check engine light came on. dtcs p3400 and p3497 read. no oil on the dipstick. took it to sussman honda where they stated that the fix is to replace the rear rocker. i pointed them to tsb 11-033 but they said it didn't apply to my car. called american honda co. and they said the same thing."

— 2008 HONDA ODYSSEY owner · ENGINE · Filed 06/23/2015

"The engine light came on while driving the vehicle. took the vehicle to a mechanic who said the vehicle had an error code of p3400 and to immediately fill it with oil and take it to honda dealer. did that and discovered class action lawsuit covered repair."

— 2008 HONDA ODYSSEY owner · ENGINE · Filed 07/01/2014

"Early 2011 after having some recall repairs done in the past like the brakes, leaking from the moon roof and the power steering problems, started noticing the engine light coming out for 1-2 days and then the oil light, checked oil level and refill was done but didn't notice any leaking."

— 2008 HONDA ODYSSEY owner · STEERING,UNKNOWN OR OTHER,ENGINE · Filed 03/02/2011

"Variable cylinder management switches on and off and causes excessive oil consumption. oil light comes on and codes p3400 and p3497 show on the reader."

— 2009 HONDA ODYSSEY owner · ENGINE · Filed 12/29/2017

"Engine light and using oil. codes p3497 and p3400. engine oil pump outputs high oil pressure causing cylinder pause mode. vehicle in motion. same problem as service bulletin 13-055 with 2013 odyssey."

— 2010 HONDA ODYSSEY owner · ENGINE · Filed 09/12/2020

All reports filed by vehicle owners directly with the U.S. Department of Transportation.

📊 Complaint Trend by Model Year

3

'08

1

'09

2

'10

1

'12

1

'14

2

'16

Common Causes on HONDA ODYSSEY

Based on NHTSA complaint component analysis for this vehicle.

ENGINE 70%

STEERING,UNKNOWN or OTHER,ENGINE 10%

POWER TRAIN 10%

ENGINE,FUEL/PROPULSION SYSTEM 10%

What To Do Next

1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.
2
Get a proper diagnosis
A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50–$150) pinpoints the root cause before you spend money on parts.
3
Compare repair quotes
Get 2–3 quotes. Dealer vs. independent shop prices often differ 30–50% for the same repair.

Frequently Asked Questions

What does P3400 mean on a HONDA ODYSSEY? ▾

P3400 indicates: P34C8. This is a powertrain code. 10 HONDA ODYSSEY owners have reported this to NHTSA.

What are the most common causes of P3400 on HONDA ODYSSEY? ▾

Based on 10 NHTSA reports, the most commonly cited components are: Engine, Steering,Unknown Or Other,Engine, Power Train. These percentages are based on the component field in owner complaints.

Is P3400 serious on my HONDA ODYSSEY? ▾

Of 10 NHTSA reports for this code on HONDA ODYSSEY, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.

What should I do if my HONDA ODYSSEY shows P3400? ▾

1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare.

P3400 on Other Vehicles

→ All codes reported on HONDA ODYSSEY