However, it's not something to ignore completely. Possible causes include:
* Engine Mounts: These rubber mounts isolate the engine from the chassis. Over time, they can wear out and degrade, leading to increased vibration. This is a common cause of idle vibration in older vehicles.
* Transmission Mount: Similar to engine mounts, a worn transmission mount can transmit more engine vibration to the vehicle's body.
* Slightly Unbalanced Tires or Wheels: Though unlikely to cause a significant vibration, a minor imbalance could contribute to a subtle shaking.
* Exhaust System: A loose or damaged exhaust component could cause some vibration.
* Normal Engine Operation: Some minor vibration is normal, especially in older engines. The level of vibration is key; a *significant* increase or a new vibration is more concerning.
What to do:
1. Observe the vibration: Is it constant, or does it vary with engine temperature? Does it change with the A/C on or off? Note any other symptoms.
2. Check fluid levels: Ensure engine oil, transmission fluid, and power steering fluid are at the correct levels. Low fluids can sometimes contribute to vibrations.
3. Listen carefully: Are there any unusual noises accompanying the vibration? Rattling, knocking, or whining sounds can provide clues.
4. Professional Inspection: If the vibration increases, becomes more noticeable, or is accompanied by other symptoms, it's best to have a mechanic inspect the vehicle. They can diagnose the cause more accurately. Don't just rely on the lack of a check engine light; many issues won't trigger it.
In short, a *very slight* vibration might be within the acceptable range for a 2004 Grand Caravan, but monitoring it and seeking professional advice if it worsens is crucial. Ignoring it could lead to more significant problems and potentially expensive repairs down the line.
