Toyota Corolla (E120): Inspection procedure
Hint
: read freeze frame data using the hand-held tester or the obd ii scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio was lean or rich, etc. At the time of the malfunction.
1 Check other dtc output(in addition p0121)
- Connect the hand–held tester or the obd ii scan tool to the dlc3.
- turn the ignition switch on and push the hand–held tester or the obd ii scan tool main switch on.
- select the item ”diagnosis / enhanced obd ii / dtc info / current codes”.
- read the dtcs.
Result:

Hint
: if any other codes besides p0121 is output, perform the troubleshooting for those dtcs first.


Go to relevant dtc chart
Other materials:
Content of driving information
■ Display items
Fuel economy
Eco Driving Indicator/Driving
range
■ Fuel economy
Use the displayed values as a reference
only.
Current fuel consumption
Displays instantaneous current fuel
consumption.
Average fuel economy (after
reset)
To reset the average fuel economy
display, press ...
Front suspension
Service data
*1: Ground clearance of front wheel center
*2: ground clearance of lower suspension arm front bolt center
*3: ground clearance of axle beam set bolt center
*4: ground clearance of rear wheel center
Torque specification
...
Circuit description
Refer to dtcs p0100
Dtc no.
Dtc detection condition
Trouble area
P0101
After engine is warmed up, conditions (a) to (d) continue for
more than 10 seconds (2 trip detection logic):
engine speed less than 900 rpm
throttle valve fully closed
&nbs ...


