What causes a P2142 code?

P2142 can be triggered by several issues — see the verified probable causes and step-by-step diagnostics shared by mechanics and owners on OBDIY.

Can I drive with a P2142 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P2142 active.

Follow the step-by-step diagnostic on this page, then read the verified fixes contributed by other Heavy Truck owners — the answer marked "Verified Cause" worked for the original poster.

OBDIY

OBD-II

P2142

Exhaust Gas Recirculation (EGR) Vent Control Circuit High

What it means

The Engine Control Module (ECM) detects an abnormally high voltage signal on the EGR vent solenoid control circuit, typically indicating a short to power.