Powertrain, generic (extended)

P2445 AIR System Pump Stuck Off (Bank 1)

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

P2445 reports that the secondary air pump delivers no air although it is commanded on. Toyota and Lexus use it on several trucks: on 2UZ-FE 4.7L models (T-SB-0230-12, revised in 2013 to include P2445), on the 2010–2013 GX 460 (L-SB-0028-14) and on the 2012 Tacoma with the 1GR-FE (T-SB-0033-17). When the memory holds just P0418, P2445 or both, Lexus replaces the pump together with both switching valves, since debris from the pump may already have reached them. Typical root causes are moisture or debris that seizes the pump, a blown fuse, or a failed relay or driver. Unlike P2444, the pump stays silent at cold start. The engine runs normally, but cold-start emissions rise and the readiness check fails. P2447 is the bank 2 equivalent.

Likely causes

Pump seized by moisture or debris from a damaged filter
Blown pump fuse or failed pump relay
Open pump supply or ground, corroded plug

Symptoms

  • Check engine lamp after a cold start
  • No pump noise directly after a cold start
  • Often stored together with P0418

Repair estimate

DifficultyMediumDIY possible
Parts and labour€30–1,200
Time0.3–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

secondary air pumpsecondary air pump relay

Related codes

P2444P2447P0418P2257P2440

References: static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov.