P0201
High SeverityInjector Circuit Malfunction - Cylinder 1
Fuel System
What Does P0201 Mean?
The fuel injector on cylinder 1 has a circuit fault. It may not be firing.
Common Fix
Replace cylinder 1 fuel injector
Estimated Cost (DIY)
$40 - $150
Symptoms
- ⚠️Cylinder 1 misfire
- ⚠️Rough idle
- ⚠️Loss of power
- ⚠️Check engine light
Common Causes
Faulty cylinder 1 injectorlikely
Damaged wiring to injector 1possible
Corroded connectorpossible
ECM driver failureunlikely
How to Diagnose P0201
- 1Check injector 1 connector
- 2Measure injector 1 resistance (compare to others)
- 3Check for power at injector
- 4Swap injector with another cylinder to confirm
Need to read or clear this code?
Shop OBD2 Scanners on Amazon →Frequently Asked Questions
- Can I swap injectors to test?
- Yes — swap cylinder 1 injector with another. If the code follows to the new cylinder, the injector is bad.
- Does P0201 always mean the injector is bad?
- Not always — check the wiring and connector first. A corroded or loose connector is a common cause.