What it means
The primary control circuit of ignition coil E reads a voltage above the expected level — typically an open primary circuit or a short to battery voltage on the primary control wire. The ECU sees no normal current flow, coil E does not fire, and the cylinder misfires. Causes: an open or disconnected primary wire, an internal open in the coil, or a faulty ECU driver.
At a glance
- Usually lights the check-engine light
- Affects emissions; the car can fail an emissions test
How it works
Ignition coil E's primary control circuit carries the signal that charges the coil before it fires its cylinder. P2313 means the computer detects higher-than-expected voltage in that circuit, which can result from an open control path, a short to supply, or poor connector contact.
Common causes
Most likely first.
- Open circuit in primary winding or harness for coil E
- Control line shorted to battery or supply
- Connector pins corroded - high contact resistance
Symptoms
- Check-engine light on, possibly flashing
- Engine misfire or rough idle
- Hesitation under acceleration
- Reduced power
How to diagnose it
- Save freeze-frame data and check related coil or cylinder misfire codes to see when the coil E circuit fault occurs.
- Use the vehicle's wiring information to locate coil E, then inspect its connector and harness for disconnection, corrosion, chafing, or heat damage.
- With the circuit inactive as specified by service information, test the coil E primary control wire for an open or short to supply.
- Check coil E's primary winding and connector terminal condition against the manufacturer's specification.
- If the wiring and coil pass, follow the manufacturer's diagnostic procedure to assess the ignition control driver.
Common fixes
- Reconnect the coil E plug or clean and repair corroded terminals.
- Repair an open or short-to-supply condition in the coil E control wiring.
- Replace coil E if its primary winding fails the specified test.
- Repair the ignition control driver only after circuit and coil tests isolate the fault there.
Can I keep driving?
Limit driving if the engine is misfiring, especially under acceleration. If the light flashes or the engine runs very roughly, stop when safe because unburned fuel can overheat and damage the catalytic converter.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.