Code Definition

P2150 — Fuel Injector Group B Circuit Low

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P2150

P2150 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P2150 is stored, the module has detected a signal or supply voltage lower than the expected operating range.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P2150 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

DTC P2150 is a generic powertrain code set when the Engine Control Module (ECM) detects a low voltage condition on the supply circuit for fuel injector Group B. In many engines the injectors are powered in groups that share a common voltage feed, and the ECM monitors that feed to confirm the injectors are receiving power. P2150 sets when the voltage on the Group B supply circuit falls below the expected range, which indicates an open circuit, a short to ground, or excessive resistance in the feed. When this code is set the injectors in that group may not operate correctly, causing misfires, ro...

Join TaT to view the complete code information and diagnostic details.

Quick Facts