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:
What to do if... (Troubleshooting)
If you have a problem, check the following before contacting your Toyota dealer.
The doors cannot be locked, unlocked, opened or closed
You lose your keys
● If you lose your keys or mechanical keys, new genuine keys or mechanical keys
can be made by your Toyota dealer.
● If you lo ...
Air outlets
■ Location of air outlets
The air outlets and air volume changes according to the selected airflow mode.
: Some models
■ Adjusting the position of and opening and closing the air outlets
► Front center outlets
Direct air flow to the left or right, up or down.
► Fro ...
On–vehicle inspection
1. Inspect cooling system for leaks
Caution:
to avoid the danger of being burned, do not remove the radiator
cap while the engine and radiator are still hot, as fluid
and steam can be blown out under pressure.
fill the radiator with coolant and attach a radiator cap tester.
  ...


