Fuel Injector Group "D" Supply Voltage Circuit/Open
The P2155 code means the vehicle's onboard diagnostic system has detected: Fuel Injector Group "D" Supply Voltage Circuit/Open. This is a moderate severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $100 - $600 (wiring or connector at the low end; actuator/valve replacement at the high end)
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What Are the Symptoms of P2155?
- Check Engine Light on
- Drivability may be normal - many circuit faults show no symptom the driver notices
- The affected system may fall back to a default strategy, costing power or economy
- Related values implausible or frozen on a scan tool
What Causes P2155? (Most Likely First)
- Fault in the Fuel Injector Group "D" Supply Voltage circuit: an open circuit - a broken wire, disconnected connector, or failed component winding High
- Damaged wiring, a chafed harness, or a corroded connector at the Fuel Injector Group "D" Supply Voltage High
- Failed Fuel Injector Group "D" Supply Voltage Moderate
- Control module input/driver fault (rule this out last - it is the least common) Low
Can I Still Drive with P2155?
Yes, but fix soon. P2155 is rated moderate severity. It is not an immediate stop-driving fault, but it will not clear itself — book the repair rather than ignoring the light.
Frequently Asked Questions
What does P2155 mean?
P2155 is a generic OBD-II code defined by SAE J2012 as "Fuel Injector Group "D" Supply Voltage Circuit/Open". It means the control module detected an open circuit - a broken wire, disconnected connector, or failed component winding
Can I keep driving with P2155?
Yes for normal use, but get it diagnosed - the system is running on a fallback strategy and a small wiring fault left alone tends to become a bigger one.
Does P2155 mean the same thing on every car?
Yes. P2155 is in the generic (SAE J2012) range, so the definition is standardized across manufacturers. The specific component location and repair procedure still vary by vehicle - check your service information.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose P2155?
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Read the code and freeze-frame data, then watch the Fuel Injector Group "D" Supply Voltage live on a scan tool.
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Inspect the connector and harness at the Fuel Injector Group "D" Supply Voltage before replacing anything - wiring and corrosion cause most of these.
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Back-probe the circuit and compare signal, ground, and reference voltage against the service-manual values.
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Wiggle-test the harness while watching the live value if the fault is intermittent.
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Clear the code and confirm with a road test that covers the conditions in the freeze frame.
Sources 2
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
- Cross-checked against the SAE J2012:2002 DTC table (2026-08-27)archived scan of the SAE standard — readable copy, not SAE’s current edition
Which Vehicles Commonly Get P2155?
- All OBD-II vehicles - this is a generic (SAE J2012) code with the same meaning across makes
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