P0283 Cylinder 8 Injector Control Circuit High Voltage

Definition: The OBD2 code P0283 indicates that the engine control module (ECM) has detected a high voltage condition in the injector control circuit for cylinder 8. This can be caused by issues such as a faulty fuel injector, wiring problems, or a malfunctioning ECM.

p0283 – Cylinder 8 Injector Control Circuit High Voltage

Typical Severity: Moderate

Common Causes

p0283 – Cylinder 8 Injector Control Circuit High Voltage

Common Causes:

• Faulty fuel injector in cylinder 8
• Short circuit or open circuit in the wiring harness connected to the fuel injector of cylinder 8
• Faulty Engine Control Module (ECM) or Powertrain Control Module (PCM)
• Corrosion or poor connection at the fuel injector connector for cylinder 8
• Issues with the fuel injector driver within the ECM/PCM

 

Common Misdiagnosis

OBD2 Code: P0283

Description: Cylinder 8 Injector Control Circuit High Voltage

Common Misdiagnosis: Replacing the fuel injector without checking for wiring issues or a faulty PCM (Powertrain Control Module).

 

Common Diagnostic Steps

OBD2 Code: P0283

Description: Cylinder 8 Injector Control Circuit High Voltage

• Inspect the injector wiring harness for any signs of damage, such as fraying or corrosion.
• Check the injector connector for secure connection and ensure there are no bent or broken pins.
• Test the voltage at the fuel injector connector to verify it is within manufacturer specifications.
• Use a multimeter to check for continuity in the injector circuit wiring from the PCM to the injector.
• Examine the fuel injector itself for any internal faults or clogs that may cause high resistance.
• If available, use an oscilloscope to monitor the signal pattern sent by the PCM to ensure proper operation.
• Consider swapping cylinder 8’s injector with another cylinder’s to see if the problem follows, indicating a faulty injector.
• If all checks pass, consider testing or replacing the Powertrain Control Module (PCM) as a last resort.