DTC 13, Engine Shutoff Solenoid Circuit Fault: Notes

1995 GMC Forward Control 4.3 Z, StandardSECTION Notes

When ignition switch is in OFF position, engine shutoff solenoid is in NO FUEL position. By providing a ground path, PCM energizes solenoid which then allows fuel to pass into fuel pump. DTC 13 will set when:

  • Ignition voltage is present on engine shutoff solenoid control circuit when PCM is requesting engine shutoff solenoid on.

Or 

  • No ignition voltage is present on engine shutoff solenoid control circuit when PCM is has requested engine shutoff solenoid off.

PCM will default to a current and history DTC 13 will be stored.

NOTE: Test numbers refer to numbers on diagnostic chart.
  1. Check for open circuit from ignition switch to solenoid.
  2. Check engine shutoff solenoid control circuit for open from solenoid to PCM.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.