Conditions for Running the DTC

IMPORTANT: Verify that DTCs P0401, P0403-P0406, and P1404 apply to the vehicle. Refer to Diagnostic Trouble Code (DTC) List - Vehicle .

DTCs P0030, P0036, P0101, P0102, P0103, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0121, P0122, P0123, P0125, P0128, P0131, P0132, P0133, P0134, P0135, P0137, P0138, P0140, P0141, P0171, P0172, P0201, P0202, P0203, P0204, P0205, P0206, P0220, P0300, P0325, P0327, P0335, P0336, P0340, P0341, P0401, P0403, P0404, P0405, P0406, P0442, P0443, P0446, P0449, P0455, P0496, P0506, P0507, P1133, P1134, P1404, P2A00, or P2A01 are not set.
The engine has been running for more than 10 minutes.
The engine speed is within 200 RPM of the desired idle.
The engine coolant temperature (ECT) is between 75-126°C (167-259°F).
The barometric pressure (BARO) is more than 74 kPa.
The vehicle is in Closed Loop.
The intake air temperature (IAT) is between 7-100°C (19-212°F).
The battery voltage is more than 10.7 volts.
The throttle position is 1.5 percent or less.
The short term fuel trim (FT) is between -10 and +10 percent.
The engine load must be stable.
Warm the catalyst by performing the following procedures:
- Fully open the hood.
- Place the transaxle in PARK for automatic transaxle.
- Place the transaxle in NEUTRAL for manual transaxle, with the clutch pedal pressed.
- Set the parking brake.
- Press and hold the service brake.
This diagnostic attempts one test during each valid idle period once the above conditions have been met for 5 seconds. This diagnostic attempts up to 6 tests during each drive cycle. The first test may be run after the initial warm-up period of 10 minutes. Maintain engine speed between 2,000-3,000 RPM in park or neutral for 2 minutes. Allow the engine to return to a stabilized idle. Shift into drive for an automatic transmission, without touching the accelerator in order for the test to run. Between each subsequent test, maintain engine speed between 2,000-3,000 RPM in park or neutral for 2 minutes. Allow the engine to return to a stabilized idle. Shift into drive for an automatic transmission, without touching the accelerator in order for the test to run.
Test the catalyst by performing the following procedures:
- Idle the engine and place the vehicle in DRIVE, or press the clutch pedal for a manual transmission vehicle, to activate the diagnostic. Within 60 seconds, the air fuel ratio will transition rich, below 14.1, for up to 7 seconds, and then may transition lean, above 15.3, for up to 7 seconds.
- Verify if DTC P0420 has passed or failed this ignition cycle with the scan tool.