P0357

Ignition Coil G Primary Control Circuit/Open

Q: Is it safe to drive with P0357?

Only briefly. A dead coil means one cylinder isn't firing, dumping raw fuel into the exhaust and risking catalytic converter damage — especially if the light is flashing.

Q: Can I just clear P0357?

It returns quickly while the coil circuit is open. Repair the coil or wiring first, then clear and re-test.

Ignition system Generic OBD-II High

What it means

P0357 means the ECM detected an open or faulty primary control circuit for ignition coil 'G' (the seventh coil). That coil fires its cylinder's spark plug, so an open circuit — from a failed coil, broken wiring, or a bad connector — leaves that cylinder misfiring, causing rough running and reduced power.

High

Can I keep driving? Driveable but the affected cylinder misfires; a sustained misfire can overheat and damage the catalytic converter, so fix it soon.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

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)
Misfire and rough idle
Reduced power and hesitation on acceleration
Possible hard starting

Common causes

Most likely first

Failed ignition coil 'G'Likely
Open or shorted primary-control wiring to the coilCommon
Poor connection or corrosion at the coil connectorCommon
Fault in the coil driver within the ECM/PCMLess often
Failed ECM (rare)Less often

How to diagnose & fix

Work through it in order

Read freeze-frame data and check for a matching cylinder misfire code (e.g. P0307).
Inspect coil 'G' connector and wiring for open circuits, damage, or corrosion.
Swap the suspect coil with a known-good one and see if the fault follows the coil.
Check the primary control circuit for continuity back to the ECM/PCM driver.
Replace the coil if it has failed. Clear and re-test.

FAQ

Quick answers

Is it safe to drive with P0357?+

Only briefly. A dead coil means one cylinder isn't firing, dumping raw fuel into the exhaust and risking catalytic converter damage — especially if the light is flashing.

Can I just clear P0357?+

It returns quickly while the coil circuit is open. Repair the coil or wiring first, then clear and re-test.

Read & clear P0357 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