Fix code P2237 P2238 P2240 P2241 on Toyota Avalon and Toyota Camry
Toyota has issued a technical service bulletin (TSB) 0278-08 to address trouble codes P2237, P2238, P2240, P2241 on 2008 Toyota Avalon and 2008-09 Toyota Camry (with 2GR-FE and 2AZ-FE engines).
P2237 Oxygen (A/F) Sensor Pumping Circuit Low (Bank 1 Sensor 1)
P2238 Oxygen (A/F) Sensor Pumping Circuit Open (Bank 1 Sensor 1)
P2240 Oxygen (A/F) Sensor Pumping Circuit Low (Bank 2 Sensor 1)
P2241 Oxygen (A/F) Sensor Pumping Circuit Open (Bank 2 Sensor 1)
Do NOT start replacing oxygen air/fuel sensors. Test them first. If they check out fine, you’ll have to replace the engine wiring harness. Toyota has released a new engine wiring harness that solves eliminates these bogus trouble codes.
© 2012 Rick MuscoplatPosted on by Rick Muscoplat