What Does P2155 Mean?
The PCM has detected an open circuit or electrical fault in the power supply circuit feeding fuel injector group D. Injectors in this group cannot operate without proper voltage supply.
Safety Warning
Engine may not start or will run extremely rough with significant power loss. Risk of catalytic converter damage from unburned fuel if driven in this condition.
Common Causes
35%
Open or corroded wiring in injector power supply circuit for group D
30%
Blown fuse or faulty injector driver relay for group D
20%
Failed PCM injector driver circuit internal failure
15%
Damaged fuel injector causing power circuit to open or blow fuse
Diagnostic Steps
1
Step 1: Check all fuses and relays associated with fuel injector group D power supply
2
Step 2: Inspect injector connector and harness for group D for physical damage or corrosion
3
Step 3: Test for battery voltage at injector power supply terminal with key on, engine off
4
Step 4: Verify circuit continuity from fuse box to injectors and check ground circuit integrity
5
Step 5: Measure resistance of each injector in group D and compare to factory specifications
Estimated Repair Cost
$100 - $800
Parts + labor, varies by vehicle and location
The PCM has detected an open circuit or electrical fault in the power supply circuit feeding fuel injector group D. Injectors in this group cannot operate without proper voltage supply.
The most common cause of P2155 (Fuel Injector Group "D" Supply Voltage Circuit/Open) is: Open or corroded wiring in injector power supply circuit for group D
Typical repair costs for P2155 range from $100 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Engine may not start or will run extremely rough with significant power loss. Risk of catalytic converter damage from unburned fuel if driven in this condition.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2155 to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel System
Difficulty
Type
Generic (SAE)
Recommended Tools
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