P0354

Ignition Coil D Primary Control Circuit/Open

Ignition / misfire Generic OBD-II High

What it means

P0354 means the ECM has detected an open or fault in the primary control circuit for ignition coil D, so that coil isn't firing its spark plug reliably. The affected cylinder misfires, making the engine run rough and lose power. It's usually a failed coil or a wiring/connector fault, and sustained misfiring can damage the catalytic converter, so it's worth addressing promptly.

High

Can I keep driving? Drivable but rough — with ignition coil D not firing its cylinder, the engine misfires and loses power. Keep driving to a minimum to protect the catalytic converter.

Real-world scan data

Seen in

1,165

scans in the past year

Found in

0.2%

of scans

0.3%

of scans that found faults

Appears alongside · share of P0354 scans

P0353in 56.5% of scans

P0352in 54.3% of scans

P0351in 50.7% 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 (may flash during an active misfire)
Rough idle, stumbling, or hesitation
Noticeable loss of power
Engine may run on fewer cylinders

Common causes

Most likely first

Failed ignition coil DLikely
Open or shorted coil primary control wiringCommon
Corroded or loose connector at the coilCommon
Failed ignition driver in the engine control module (rare)Less often

How to diagnose & fix

Work through it in order

Confirm which cylinder coil D serves, then check for an accompanying misfire code.
Inspect the coil connector and primary control wiring for an open, short, or corrosion.
Swap coil D with a neighbouring coil; if the fault follows the coil, replace it.
Measure the coil primary against spec and verify the ECM drive signal, then repair or replace. Clear and re-test.

FAQ

Quick answers

Is it safe to drive with P0354?+

Only briefly. A dead coil causes a misfire that sends raw fuel into the exhaust and can overheat the catalytic converter — worse if the light is flashing.

Can I just clear P0354?+

It'll return quickly — an open coil primary circuit is re-detected as soon as the ECM tries to fire that coil.

Read & clear P0354 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