What Does P2146 Mean?
The PCM has detected an open circuit or loss of voltage supply to fuel injector group A. This prevents proper fuel delivery to one bank or group of cylinders, causing significant drivability issues.
Safety Warning
Severe loss of power and potential engine damage from running too lean. May stall unexpectedly in traffic. Avoid driving until repaired.
Common Causes
35%
Blown fuse or fusible link in injector power supply circuit
30%
Open circuit in main injector power supply wiring
20%
Failed fuel injector driver module or relay
10%
Disconnected or severely corroded injector harness connector
5%
Internal PCM power distribution failure
Diagnostic Steps
1
Step 1: Check all fuses related to fuel injection system using fuse diagram and test light or multimeter
2
Step 2: Measure voltage at injector connector with key on; should have battery voltage present
3
Step 3: Inspect main injector harness connector for pushed-out pins, corrosion, or damage
4
Step 4: Trace power supply circuit from battery/relay to injector connector checking for breaks or high resistance
5
Step 5: Test injector driver module operation if equipped, or verify PCM output with known-good injector
Estimated Repair Cost
$100 - $900
Parts + labor, varies by vehicle and location
The PCM has detected an open circuit or loss of voltage supply to fuel injector group A. This prevents proper fuel delivery to one bank or group of cylinders, causing significant drivability issues.
The most common cause of P2146 (Fuel Injector Group "A" Supply Voltage Circuit/Open) is: Blown fuse or fusible link in injector power supply circuit
Typical repair costs for P2146 range from $100 to $900, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Severe loss of power and potential engine damage from running too lean. May stall unexpectedly in traffic. Avoid driving until repaired.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2146 to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel Injection System
Difficulty
Type
Generic (SAE)
Recommended Tools
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