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Engine Won't Turn Over: Why There's No Crank and What to Fix

Plain-English explanation

'Engine won't turn over' means there is zero cranking — no rr-rr-rr sound at all. When you turn the key or push start, nothing happens electrically in the starter-to-engine circuit. This is different from 'cranks but won't start' where the engine is at least spinning. Here, the starter isn't even trying. The relay race between battery, cables, ignition switch, and starter motor has been broken before it even gets going. The good news: most of these causes are cheap to diagnose and fix.

Most likely causes — ranked

#1🔴 most likely

Driveway Pinpoint Test

Try turning on the interior dome light before attempting to start. If the light is completely dead (not dim — dead), the battery has zero charge. If lights work but nothing happens when you crank, the battery may have enough charge to power lights but not the starter's much higher current demand. Attempt a jump-start — if the engine immediately cranks and starts after jumping, the battery is confirmed dead. Get the free battery test at AutoZone to see if it can hold a charge.

Fix-vs-Skip Money Panel

DIY Cost

~$120

parts only

Shop Cost

~$215

parts + labor

If you skip it

A dead battery that won't hold a charge needs replacement. Repeatedly jumping without replacing risks leaving you stranded and can damage the alternator through overwork.

Driveway Pinpoint Test

If jump-starting produces zero cranking (not even a click or attempt), the starter itself has failed. The starter solenoid can also fail independently — you'll hear a single CLUNK and then nothing. Locate the starter motor (typically bolted to the engine near the transmission bell housing) and try the tap test: with the ignition in 'Start' position, have a helper hold the key while you tap the starter body firmly with a hammer. A temporary crank after tapping confirms the starter is failing.

Fix-vs-Skip Money Panel

DIY Cost

~$90

parts only

Shop Cost

~$380

parts + labor

If you skip it

A dead starter leaves you completely stranded. There is no workaround once it fails fully. Catching it at the 'intermittent tap-to-start' stage saves towing costs.

Driveway Pinpoint Test

If the battery and starter both test good but the car still won't crank, the ignition switch is a strong suspect. Check: does turning the key to the 'On' position power the dash lights and accessories normally? If accessories work but 'Start' produces nothing, the switch isn't sending the start signal to the relay. Also check the neutral safety switch (automatic transmissions) — try starting in Neutral instead of Park. If it starts in Neutral, the neutral safety switch is the culprit, not the ignition switch.

Fix-vs-Skip Money Panel

DIY Cost

~$40

parts only

Shop Cost

~$230

parts + labor

If you skip it

An ignition switch that's starting to fail will get worse. Random no-starts that resolve on their own are a strong indicator. Failure will eventually be total and leave you stranded.

Get a FREE OBD2 scan first — no purchase required

AutoZone, O'Reilly Auto Parts, and Advance Auto Parts all scan your car's computer for free. Walk in, they plug in a scanner, you get a code in under 2 minutes. Then come back here and look up that code at eli5cars.com/obd2 for the plain-English explanation.

Pro tip: Take a photo of the code before they clear it.

Watch the repair

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Frequently asked questions