P0203
High SeverityInjector Circuit Malfunction - Cylinder 3
Fuel System
What Does P0203 Mean?
Cylinder 3 injector circuit fault.
Common Fix
Replace cylinder 3 injector
Estimated Cost (DIY)
$40 - $150
Symptoms
- β οΈCylinder 3 misfire
- β οΈRough idle
- β οΈPower loss
Common Causes
Faulty injectorlikely
Wiring issuepossible
Bad connectorpossible
How to Diagnose P0203
- 1Check connector
- 2Test resistance
- 3Swap with another injector
- 4Replace if confirmed bad
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Shop OBD2 Scanners on Amazon βFrequently Asked Questions
- How much does injector replacement cost?
- DIY: $40-$150 per injector. Mechanic: $150-$400 including labor.
- Can I drive with a dead injector?
- You can limp home but driving with a dead cylinder sends raw fuel into the exhaust, damaging the catalytic converter.
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