DTC P2A00 A/F Sensor Circuit Slow Response (Bank 1 Sensor 1): Description

WARNING: This page is about a different car, the 2007 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.

Refer to DTC P2195 .

DTC DETECTION CONDITION

DTC No.	DTC Detection Condition	Trouble Area
P2A00	When A/F sensor output voltage change is below compared to fuel trim change, ECM judges that A/F sensor circuit response is slow if conditions (a), (b) and (c) are met (2 trip detection logic): After engine is warmed up Engine speed is 1,100 rpm or more Vehicle speed 37.5 mph (60 km/h) or more	Open or short in A/F sensor (bank 1 sensor 1) circuit A/F sensor(bank 1 sensor 1) A/F sensor heater EFI M relay A/F sensor heater and relay circuit Air induction system Fuel pressure Injector PCV hose connection ECM

HINT:

Sensor 1 refers to the sensor mounted before the TWC and is located near the engine assembly.