P0350

Ignition Coil Primary/Secondary Circuit/Open

Ignition system Generic OBD-II High

What it means

P0350 is a generic code meaning the ECM has found a fault (open or short) in an ignition coil's primary or secondary control circuit. The affected coil may not fire properly, so you'll typically get a misfire, rough running, and lost power — and on engines that depend on a single coil, hard starting or a no-start.

High

Can I keep driving? Depends — a dead coil usually means a misfire, and on engines that rely on one coil it can cause hard starting or a no-start; fix promptly to protect the converter.

Real-world scan data

Seen in

335

scans in the past year

Found in

0.1%

of scans

0.1%

of scans that found faults

Appears alongside · share of P0350 scans

P0300in 27.2% of scans

P0304in 26.3% of scans

P0301in 26.0% of 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
Misfire and rough running
Reduced power and hesitation
Hard starting or stalling

Common causes

Most likely first

Faulty ignition coilLikely
Damaged or corroded coil wiring or connectorCommon
Worn spark plug or plug wireCommon
Failed coil driver in the ECM (rare)Less often

How to diagnose & fix

Work through it in order

Scan for cylinder-specific misfire codes to identify the affected coil.
Inspect the coil connector and primary wiring for damage or corrosion.
Measure coil primary and secondary resistance against spec.
Swap the coil to another position and see if the fault follows it.
Replace the faulty coil or plug; if wiring and coil are good, check the driver circuit/ECM. Clear and re-test.

FAQ

Quick answers

Is it safe to drive with P0350?+

A misfire can overheat the catalytic converter, so drive as little as possible until fixed; if the engine won't start, don't keep cranking it.

Can I just clear P0350?+

You can, but it returns until the coil circuit fault is repaired.

Read & clear P0350 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX