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
Common Causes
How to Diagnose P0203
- 1Check connector
- 2Test resistance
- 3Swap with another injector
- 4Replace if confirmed bad
OEM Diagnostic Flowchart
Scroll to load technician if/then branches.
Read live data and freeze frame for P0203 to pinpoint the cause before buying parts.
Related Resources
Repair guides, symptom pages, and wiring diagrams related to P0203.
OEM Manual Evidence
Browse →A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL Denali AWD V8-6.2L Service Manual | Operation CHARM Operation CHARM : Car...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL Denali 2WD V8-6.2L Service Manual | Operation CHARM Operation CHARM : Car...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL 4WD V8-6.0L Service Manual | Operation CHARM Operation CHARM : Car repair...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL 4WD V8-5.3L Service Manual | Operation CHARM Operation CHARM : Car repair...
Related Symptoms
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Open the exact vehicle hub grounded by OEM manual evidence related to P0203.
Open the exact vehicle hub grounded by OEM manual evidence related to P0203.
Open the exact vehicle hub grounded by OEM manual evidence related to P0203.
Related Codes
Frequently 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.