Skip the auto shop - Our mechanics make house calls

Q: Won't start periodically

asked by on

03 Caravan will run great for a week or two then all of a sudden it'll turn over but won't start.After multiple tries almost killing the battery it'll finally start and white smoke will pour out for a few min then clear up and drive fine for a few more weeks then happens all over again. I have had a few guys tell me that's it's the 02 sensors or the pcm control module. Any help would be appreciated.

My car has 240000 miles.
My car has an automatic transmission.

Hi there. Any number of components could create an intermittent no-start situation. The O2 sensors and the PCM (powertrain control module) are remote possibilities. Assuming the check engine light has not come on, this leads me to believe that the PCM has not recognized the fault. A few possibilities are a faulty ASD (automatic shutdown) relay, a faulty fuel pump relay, a faulty CKP (crankshaft position) sensor, a faulty CMP (camshaft position) sensor, a poor connection or electrical fault in the power distribution center. There are several other possibilities as well. I recommend having your vehicle’s intermittent no start be diagnosed and repaired by a certified technician, such as one from YourMechanic.

Was this answer helpful?

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!
  1. Home
  2. Questions
  3. Won't start periodically

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: I installed a new fuel pump on a 1997 dodge caravan, it turns on but no gas is getting to the engine. Access to the fuel filter is

Hi there. It sounds like the fuel filter being corroded is the issue. It will need to be removed as well as any lines that may be corroded. You may have to replace a good portion of the lines if...

Q: Power steering problem 2003 Chevrolet Impala

Hello - I believe the serpentine belt and it's tensioner are weak, slipping and causing both the alternator and power steering behavior you are experiencing. Both functions are driven by this belt, which will tend to slip worse when rain/water...

Q: Tengo una hyundai santa fe el código que me dice es p0421 q pieza puede ser ? Por el muffle huele raro

Hello, thank you for writing in. The code P0421 means the exhaust system is detecting an issue with the fumes being to rich. This can happen when the spark plugs are worn and cause the fuel not to burn correctly,...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...