The code indicates that the voltage on the fuel injector supply circuit for injector group B is higher than the expected range, suggesting a possible short to voltage or a fault in the circuit.
A short in the injector supply wire harness can feed battery voltage into the circuit, raising the measured voltage above normal.
A stuck or shorted injector can draw excessive current, causing the supply voltage to appear elevated on the circuit.
Poor contact at the injector connector or power feed can create voltage irregularities that trigger the high‑voltage detection.
A rare internal fault in the PCM's driver circuit can misreport voltage levels, but this is typically the last suspect.
Usually not; the code is most often caused by wiring or injector problems, and PCM replacement is only considered after those possibilities are ruled out.
Yes, a shorted or malfunctioning injector in group B can raise the supply voltage reading and trigger the code.
No; only the affected injector(s) in group B should be inspected and replaced if found faulty.
If the short is repaired and the voltage returns to normal, the code will clear after a successful drive cycle.