Can I drive with P0201?

Briefly and gently — a dead cylinder stresses the catalytic converter and shakes engine mounts.

How do I know it's not the ECU?

Prove the injector (resistance/swap) and the wiring (continuity to the ECU pin) first; only with both healthy does the driver stage become the suspect.

Same method, different cylinder: the circuit-open family shares one diagnostic recipe across P0201–P0208.

Fuel / Electrical · Generic OBD-II

P0201 — Cylinder 1 Injector Circuit/Open

Cylinder 1's fuel injector circuit reads open — no fuel command reaches that cylinder, so it's dead until the circuit is restored.

By iCarsoft Engineering Team Updated July 2, 2026 Checked against SAE J2012

Quick reference

Severity

High

Safe to drive

Caution

System

Fuel / Electrical

Code type

Generic

Repair level

DIY-Moderate

Typical cost

$80–$600

Identical playbook to any injector-circuit code: resistance, connector, swap test — in that order, before parts.

What triggers it

Common causes, most likely first

Failed injector coil (open winding)

Cylinder 1's injector solenoid has gone open-circuit.

Very common

Wiring damage to injector 1

Broken feed or control wire in the harness run.

Common

Corroded/loose connector

Bad pins at the injector plug — cylinder 1 often sits nearest heat and steam cleaning.

Common

ECU driver failure

Rare; by elimination only.

Rare

How it shows up

Symptoms you'll notice

Persistent misfire on cylinder 1 — typically with P0301.
Rough idle and vibration — one silent cylinder.
Power loss — noticeably down one cylinder.
Check Engine light — may flash under load.

How to pinpoint it

Diagnostic steps

Confirm with companion codes

P0201 + P0301 = cylinder 1 electrical fuel fault.Tool: any scan tool

Measure injector resistance

Compare against neighbors (typically 10–16 Ω). Open = the injector.Tool: multimeter

Inspect connector and wiring

Pins, wiggle test, supply voltage at the plug with key on.Tool: visual + multimeter

Swap injectors between cylinders

Code follows the part = injector. Stays on cylinder 1 = wiring/driver.Tool: hand tools

Run an injector actuation test

Command injector 1 to verify the restored circuit end to end.Tool: bidirectional test

What the fix costs

Repair & cost

Fuel injector

$80–300

Access varies by engine

Wiring/connector repair

$80–250

Pin and loom work

Diagnosis

$100–150

One shop hour

Estimates are indicative and vary by region, vehicle and parts choice. Confirm the actual cause with live data before buying parts.

Diagnose it yourself

The right iCarsoft tool for P0201

iCarsoft CR Pro S

Per-cylinder misfire counters plus on-demand injector actuation make CR Pro S the fastest way to prove whether cylinder 1's circuit is truly open and whether your repair actually closed it.

Full-system scanLive data graphingBi-directional testsService resets

View iCarsoft CR Pro S Compare tools

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Enter your make, model and what you're seeing — the iCarsoft AI assistant will rank the likely causes for your car and suggest the next test.

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Quick answers

P0201 FAQ

Can I drive with P0201?: Briefly and gently — a dead cylinder stresses the catalytic converter and shakes engine mounts.
How do I know it's not the ECU?: Prove the injector (resistance/swap) and the wiring (continuity to the ECU pin) first; only with both healthy does the driver stage become the suspect.
Same fix as P0202?: Same method, different cylinder: the circuit-open family shares one diagnostic recipe across P0201–P0208.

P0201 — Cylinder 1 Injector Circuit/Open