Q: Unreliable battery leaves me stranded

asked by on

My 2008 Honda Odyssey's battery randomly goes dead when it is parked. Besides having to carry a battery jumper around, my biggest issue is I've gone through three batteries already for this 55,000 mile van! What can I do to stop this?

A: There is only 2 things that can cause the b...

There is only 2 things that can cause the battery to die when the vehicle is sitting: an excessive parasitic draw, or a defective battery. In this instance, the condition is not consistent which makes testing for this condition very difficult because it does not occur all the time. Honda found the cause to be the air conditioning clutch relay intermittently malfunctioning (shorting internally) thus, draining the battery. They advised their dealers to replace the relay, but it never became a recall. Have a mechanic disconnect the air clutch for a while the car is parked to see if that affects the battery. If the problem persists, a professional needs to perform tests to diagnose the problem. If the problem is gone, then replace the relay. If it is going bad after a year or 2, try having a mechanic, such as YourMechanic replace the battery.

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Transmission is shifting poorly, what’s causing this?

It is possible that this is a sign of impending catastrophic failure but not a guarantee. First, check to see if your vehicle is leaking any fluid and if so, verify the type of fluid. If you find a leak...

Q: Overheating, leaking, and starting issue

I think you meant to say that the engine's cooling system is leaking, rather than the AC system. Without testing the cooling system, there is no way to tell where the leaks are. The hard starting may not be related...

Q: How do I check the level of engine coolant?

Engine coolant serves a vital purpose in your engine, helping to disperse heat from engine operation into the atmosphere. As a responsible car owner, you should know how to keep an eye on your coolant level. Don’t worry, though. It’s...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.