What causes a P2436 code?

P2436 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 P2436 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P2436 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.

OBD-II

P2436

Secondary Air Injection System Air Flow/Pressure Sensor Circuit Range/Performance Bank 2

What it means

The Engine Control Module (ECM) detects an implausible signal or out-of-range value from the Secondary Air Injection (SAI) pressure sensor on bank 2. On modern Class 8 diesels, this often relates to specialized emissions air pumps or auxiliary air systems used to heat the aftertreatment system.