P2301

Ignition Coil A Primary Control Circuit High

Q: Is it safe to drive with P2301?

Briefly, but a misfiring cylinder can damage the catalytic converter and gets worse over time. Repair it promptly, especially if the light is flashing.

Q: Can I just clear P2301?

It returns as soon as the coil circuit faults again. Fix the wiring or coil first.

Ignition system Generic OBD-II Medium

What it means

P2301 means the PCM detected high voltage on the primary control circuit for ignition coil "A." The coil's primary side isn't switching as commanded — usually an open or a short to power in the wiring, or a coil/driver fault — so that cylinder may not spark properly. The typical result is a misfire on the affected cylinder, rough running, and reduced power.

Medium

Can I keep driving? Usually yes for short trips, but the affected cylinder may misfire; a sustained misfire can overheat and damage the catalytic converter, so repair 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)
Rough idle and engine shake
Misfire or hesitation from the affected cylinder
Reduced power and poorer fuel economy

Common causes

Most likely first

Open or short-to-power in the coil 'A' primary control wiring or connectorLikely
Faulty ignition coil 'A'Common
Poor or corroded connector at the coilCommon
Failed coil driver inside the PCM/ignition moduleLess often

How to diagnose & fix

Work through it in order

Identify which cylinder coil 'A' serves and inspect its connector and control wiring for opens or shorts to power.
Swap or bench-test the suspect coil against a known-good one.
Check the coil's power, ground, and control (driver) circuit continuity.
Repair the wiring or replace the faulty coil.
Clear the code and confirm the misfire is gone on a road test.

FAQ

Quick answers

Is it safe to drive with P2301?+

Briefly, but a misfiring cylinder can damage the catalytic converter and gets worse over time. Repair it promptly, especially if the light is flashing.

Can I just clear P2301?+

It returns as soon as the coil circuit faults again. Fix the wiring or coil first.

Read & clear P2301 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