Rick's Free Auto Repair Advice

Posts Tagged: Bank 1 Sensor 1

P2237 P2238 P2240 P2241 Avalon Camry

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 … Read More

P0133

P0133 – Oxygen Sensor Circuit Slow Response (Bank 1 Sensor 1) A P0133 trouble code means the oxygen sensor response doesn’t meet proper criteria. An Oxygen sensor must switch constantly between .27 and .62 volts. The engine computer waits until the engine has reached at least 145 degrees and the vehicle has driven at least 10MPH for 30 seconds before it starts looking at the switching rate. The computer looks for about 8 voltage changes per second (these are called CROSS COUNTS). If it sees less than that, it sets … Read More


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