P0E4E: Engine Failed to Crank

What it means

The ECM detects that the engine failed to crank when commanded. Starter motor, power supply, or interlock fault.

At a glance

• Usually lights the check-engine light
• The engine or gearbox may go into limp mode

How it works

The engine control module (ECM) monitors whether the engine begins turning after it requests a crank. P0E4E sets when the engine does not crank as expected, which can result from a weak 12-volt supply, a starter-system fault, or a crank interlock or control fault.

Common causes

Most likely first.

1. Starter or engine-cranking system fault
2. Low 12-volt supply voltage
3. Cranking interlock or control-circuit fault

Symptoms

• Engine may not start when commanded
• Hybrid/EV system warning light may turn on

How to diagnose it

1. Check the scan-tool freeze-frame and hybrid-system data for 12-volt supply voltage and the ECM’s crank request at the time the fault occurred.
2. Check the 12-volt battery condition and connections, since low supply voltage can prevent the starter system from operating.
3. Inspect the starter-system wiring, grounds, and connectors for looseness, corrosion, or damage.
4. Check whether a crank interlock is preventing the request, using the vehicle’s available status data and operating conditions.
5. If supply and interlock checks pass, test the starter control circuit and starter system according to the manufacturer’s procedures.

Common fixes

• Clean and secure loose or corroded 12-volt battery connections.
• Charge or replace a 12-volt battery that fails the manufacturer’s condition test.
• Repair damaged starter wiring, grounds, or connectors.
• Repair a confirmed crank interlock or control-circuit fault.
• Replace a starter component only after testing confirms it has failed.

Can I keep driving?

If the engine will not crank, the vehicle may not start or may lose propulsion when shut down; avoid relying on it for a journey. If it starts and drives normally, limit driving and address the fault promptly because a repeat no-start may leave you stranded.