P0203 on Chrysler: How to Diagnose & Fix
Injector Circuit/Open - Cylinder 3
1 Chrysler model · 1 documented issue · $100-$400 repair
P0203 on Chrysler by model: symptoms, diagnosis and fix
Fuel injectors develop clogs and O-ring leaks from age and fuel deposit buildup. Clogged injectors cause misfires and poor fuel economy. Leaking injector O-rings create a fire hazard from fuel dripping onto the hot engine.
Common Symptoms
- Rough idle
- Misfires
- Fuel smell from engine bay
- Poor fuel economy
How to Fix
Clean or replace fuel injectors. Professional ultrasonic cleaning restores most clogged injectors. Replace all injector O-rings with Viton (fuel-resistant) O-rings. Use fuel injector cleaner additive periodically as preventive maintenance.
Sources for this issue (1)
P0203 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0203 mean on a Chrysler?
P0203 stands for "Injector Circuit/Open - Cylinder 3." This code means the Engine Control Module detected an electrical problem (open circuit or out-of-range resistance) in the fuel injector control circuit for cylinder 3. The ECM pulses each injector electrically and watches the circuit to verify it is operating. P0203 means the expected feedback for cylinder 3's injector is missing or abnormal, so that cylinder may not be fueling properly. The typical result is a misfire, rough idle, and reduced performance traceable to cylinder 3. On Chrysler it is documented across 1 model: LeBaron.
What are the most common causes of P0203?
The most common causes of P0203 are: Damaged or corroded injector connector at cylinder 3, Open or shorted wiring in the injector control circuit, Failed (electrically open) fuel injector on cylinder 3, Loose or backed-out connector pin, Poor ground or power feed to the injector, Faulty injector driver inside the ECM/PCM, Chafed harness causing intermittent open. The specific cause varies by vehicle.
How much does it cost to fix P0203 on a Chrysler?
Published repair estimates on Chrysler range from $100 to $400 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P0203 on a different make?
View P0203 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.