P0208 indicates that the powertrain control module (PCM) has detected an abnormal voltage or resistance in the circuit that controls the fuel injector for cylinder 8. This code is set when the injector circuit is open, shorted, or exhibits higher‑than‑expected resistance. If left unresolved, it can cause an engine misfire, poor drivability, and increased emissions.
The injector’s coil may be open or shorted, causing the circuit to fall out of specification.
Broken, chafed, or pinched wires in the injector circuit can create an open or high‑resistance condition.
Oxidation, bent pins, or a loose connection can intermittent or improper voltage delivery to the injector.
A loss of power due to a failed fuse or relay will prevent the injector from operating.
Rarely, the engine control module may fail to correctly drive the injector circuit; this is usually diagnosed after other components are verified.
The vehicle may run roughly or misfire, which can lead to further damage if driven extensively. It is advisable to diagnose and repair the issue promptly.
Prolonged misfiring can overheat the catalytic converter or cause other engine‑related problems; fixing the code early reduces the risk of additional damage.
No. In the vast majority of cases the problem lies in the injector itself, its wiring, or connectors. PCM replacement is rarely needed and is typically considered only after all other possibilities are eliminated.
Typical repairs include repairing or replacing damaged wiring, cleaning or replacing the corroded injector connector, swapping out a faulty injector, and renewing any blown fuses or relays in the circuit.