Cummins Generator Error Code 381: How to Fix It

Q: What does Cummins generator error code 381 mean?

Error code 381 indicates a problem with the intake manifold pressure, meaning the pressure reading is outside the expected range.

Q: Can I drive or use the generator with error code 381?

It is not recommended as the generator may run poorly, produce less power, or stall. Continuing to run it could cause further damage.

Q: How much does it cost to fix error code 381?

DIY costs are minimal (cleaner, multimeter). Replacing the sensor can cost $50-$150. Professional service can range from $150-$400 depending on labor and parts.

Q: Where is the intake manifold pressure sensor located?

Typically on the intake manifold or near the throttle body. Consult your generator's service manual for the exact location.

Q: Can a dirty air filter cause error code 381?

Yes, a severely clogged air filter can restrict airflow and affect intake manifold pressure readings, triggering the error.

Abstract

Error code 381 on your Cummins generator indicates a problem with the engine intake manifold pressure. This typically means the pressure reading is out of normal range, which can be caused by a faulty sensor, wiring issues, or a blockage in the intake system. Follow these steps to troubleshoot and resolve the issue.