Ignition Coil E Primary Control Circuit/Open
What it means
P0355 means the engine computer has detected an open or fault in the primary control circuit of ignition coil 'E' (the fifth coil). If that coil stops firing its cylinder, the engine misfires and loses power. It usually points to a wiring or connector problem at the coil, or a failed coil.
Can I keep driving? Usually drivable but the affected cylinder may not fire, causing a misfire — extended driving with a dead cylinder can damage the catalytic converter, so repair it promptly.
Real-world scan data
Appears alongside · share of P0355 scans
Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.
Common symptoms
What you'll notice
- Check-engine light on (may flash if the cylinder is misfiring)
- Rough idle, shaking, or a noticeable miss
- Reduced power and hesitation on acceleration
- Increased fuel consumption
Common causes
Most likely first
- Failed ignition coil 'E'Likely
- Open or shorted coil primary control (driver) circuit wiringCommon
- Loose or corroded connector at the coilCommon
- Faulty coil driver in the ECM/ignition module (rare)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and inspect the coil 'E' connector and wiring for damage, corrosion, or a loose pin.
- Swap coil 'E' with a neighbouring coil; if the fault follows the coil, replace it.
- Check the primary control circuit for opens/shorts back to the ECM or ignition module.
- Confirm power and ground at the coil, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with P0355?+
Can I just clear P0355?+
Related codes
Read & clear P0355 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.