P0204 on Chevrolet
Injector Circuit/Open - Cylinder 4
P0204 on Chevrolet vehicles indicates injector circuit/open - cylinder 4. Au7o has documented this code across 1 Chevrolet model — most commonly on Silverado 2500HD. 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 4. The ECM controls each injector through its own circuit and monitors it to confirm proper operation. P0204 indicates the computer isn't seeing the expected electrical response from cylinder 4's injector, so that cylinder may not be getting the correct fuel. You'll often notice a misfire, rough running, and a loss of power tied to cylinder 4. Typical repair costs on Chevrolet range from $100 to $4,000, depending on the specific model and root cause.
Common Causes of P0204
- •Damaged or corroded injector connector at cylinder 4
- •Open or shorted wiring in the injector control circuit
- •Failed (electrically open) fuel injector on cylinder 4
- •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
P0204 on Chevrolet by Model
Chevrolet Silverado 2500HD(2 issues)
- Duramax Diesel Injector Failure2001-2015
Bosch fuel injectors on early Duramax engines develop internal leaks causing rough running, white smoke, and hard starts. LB7 generation (2001-2004) most affected with class action settlement history.
- Injector Wiring Harness Chafing (Duramax)2001-2016
The fuel injector wiring harness on the Duramax diesel routes across the top of the engine under the valve covers. The harness rubs against the valve cover and rocker arms, causing the insulation to wear through and the wires to short or open. When an injector wire is damaged, the affected cylinder misfires, the engine runs rough, and white smoke pours from the exhaust. The chafing is accelerated by engine vibration and can affect multiple cylinders over time. GM released updated harness routing clips but the fundamental design has the harness in a high-wear location.
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View P0204 across all makes →Frequently Asked Questions
What does P0204 mean on Chevrolet?▼
P0204 stands for "Injector Circuit/Open - Cylinder 4." 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 4. The ECM controls each injector through its own circuit and monitors it to confirm proper operation. P0204 indicates the computer isn't seeing the expected electrical response from cylinder 4's injector, so that cylinder may not be getting the correct fuel. You'll often notice a misfire, rough running, and a loss of power tied to cylinder 4. On Chevrolet specifically, this code is documented across 1 model.
What causes P0204 on Chevrolet vehicles?▼
Common causes on Chevrolet: Damaged or corroded injector connector at cylinder 4, Open or shorted wiring in the injector control circuit, Failed (electrically open) fuel injector on cylinder 4, Loose or backed-out connector pin, Poor ground or power feed to the injector. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0204 on a Chevrolet?▼
Repair costs on Chevrolet range from $100 to $4,000, depending on the specific model and root cause.
Which Chevrolet models have P0204 documented?▼
Au7o has documented P0204 on 1 Chevrolet model: Silverado 2500HD.