P0202

Cylinder 2 Injector A Circuit

Fuel injector circuit Generic OBD-II High

What it means

P0202 means the ECM has detected an electrical fault in the control circuit for the cylinder 2 fuel injector. If the circuit opens, cylinder 2 stops firing and the engine misfires, runs rough, and loses power. The usual cause is a wiring or connector problem at the injector, or a failed injector itself.

High

Can I keep driving? Drive as little as possible — an electrical fault in the cylinder 2 injector circuit can kill that cylinder, causing a heavy misfire, rough running and possible stalling.

Real-world scan data

Seen in

6,487

scans in the past year

Found in

1.0%

of scans

1.8%

of scans that found faults

Appears alongside · share of P0202 scans

P0201in 70.4% of scans

P0203in 70.3% of scans

P0204in 48.0% 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, rough idle, or shaking from a dead or weak cylinder 2
Reduced power and hesitation on acceleration
Rough running and, on some engines, stalling

Common causes

Most likely first

Corroded, loose, or damaged connector at the cylinder 2 injector (most common)Likely
Open or shorted wiring in the injector control circuitCommon
Failed fuel injector (open or shorted coil)Common
Faulty ECM injector driver (rare)Less often

How to diagnose & fix

Work through it in order

Read freeze-frame and confirm the misfire/injector fault is on cylinder 2.
Inspect the injector connector and wiring for corrosion, damage, or a break; wiggle-test while watching for a change.
Measure the injector coil resistance against spec and compare with a known-good cylinder.
Swap the suspect injector with a neighbouring one; if the fault follows, replace the injector.
Verify the ECM is pulsing the injector before condemning the driver, then clear and re-test.

FAQ

Quick answers

Is it safe to drive with P0202?+

Keep it brief. A dead cylinder 2 means a heavy misfire that wastes fuel and can overheat the catalytic converter, so get it fixed promptly.

Can I just clear P0202?+

It returns as soon as the ECM sees the injector-circuit fault again. Repair the wiring or injector first, then clear it.

Read & clear P0202 yourself

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

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