What it means
Ignition E control signal stuck high — short to B+. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
At a glance
- Usually lights the check-engine light
- Affects emissions; the car can fail an emissions test
How it works
Ignition E is the fifth designated ignition-coil control channel; the letter identifies the channel, not a universal cylinder number. The control module monitors the E control-signal circuit and sets this code when its signal is higher than expected, which can happen if the wire is shorted to battery voltage.
Common causes
Most likely first.
- Short to B+
- Connector pins corroded - high contact resistance
- Supply wire pinched against B+ source
Symptoms
- Check engine light on or flashing
- Engine misfire or rough running
- Power loss or hesitation
- Hard starting
How to diagnose it
- Record freeze-frame data and check live misfire counts to see whether the fault coincides with rough running or a particular operating condition.
- Inspect the Ignition E coil and control-circuit connectors for water, corrosion, damaged seals, backed-out pins, or pinched wiring.
- With the circuit fault present, monitor the Ignition E control signal while gently moving the harness to check whether it changes with wire movement.
- With the ignition off and the circuit isolated as specified by the manufacturer, check whether the E control wire is shorted to battery voltage.
- If wiring and connectors pass, test the Ignition E coil and module driver according to the manufacturer's procedure.
Common fixes
- Repair chafed or pinched Ignition E wiring that is contacting a power source.
- Clean and dry the E connector, then repair corroded, loose, or pushed-back terminals.
- Replace a coil that fails the manufacturer's Ignition E coil tests.
- Repair or replace the control module only if its E driver is confirmed faulty.
Can I keep driving?
If the engine is misfiring, avoid hard acceleration and stop driving if the check-engine light flashes; continued misfire can damage the catalytic converter. If it runs smoothly and the light is steady, limit driving and arrange diagnosis soon.
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.