* Low Battery Voltage: This is the most frequent cause. A weak battery won't provide enough power to consistently turn the starter motor. Test the battery voltage with a multimeter. It should be around 12.6V when fully charged. A load test is even better, simulating the starter's draw.
* Bad Battery Connections: Corroded or loose battery terminals or cables will restrict current flow. Clean the terminals thoroughly and ensure tight connections.
* Failing Starter Motor: The starter motor itself could be failing. The engagement suggests it's getting power, but the motor itself might not be strong enough to turn the engine over. This could be due to worn brushes, a failing solenoid, or a damaged armature.
* Engine Mechanical Issues: While less likely given the starter's engagement, a severely seized engine, a broken timing belt (if applicable to your engine), or other significant internal mechanical problems could create too much resistance for the starter to overcome. You'd likely feel or hear an unusual amount of resistance or a grinding sound if this were the case.
* Starter Solenoid Issues: The solenoid is the electrical switch within the starter. If it's malfunctioning, it might engage briefly and then disengage because it's not properly completing the circuit.
* Neutral Safety Switch (NSS): This switch prevents the starter from engaging unless the transmission is in Park or Neutral. A faulty NSS will prevent the starter from functioning.
Troubleshooting Steps:
1. Check Battery Voltage and Connections: This is the easiest and quickest check. Clean terminals, tighten connections, and test the battery voltage.
2. Listen Carefully: When trying to start, listen for any unusual sounds – grinding, clicking, or whining. These can indicate specific problems.
3. Tap the Starter (carefully): With the key off, gently tap the starter motor with a hammer or mallet. Sometimes, a stuck component can be freed this way. *This is a last resort and should only be done if you are comfortable working on your vehicle*.
4. Test the Starter Solenoid: This often requires some electrical testing with a multimeter to check for voltage and continuity.
5. Have the Starter Tested: Take the starter to an auto parts store or mechanic to have it tested. They have the equipment to diagnose problems more accurately.
6. Consider Professional Help: If you're not comfortable working on your car's electrical system, it's best to have a qualified mechanic diagnose and repair the problem. Incorrectly diagnosing and repairing electrical issues can lead to further damage.
Remember to provide the make and model of your vehicle for more specific advice. The 2.2L engine was used in several vehicles, and the specifics might vary.
