P1431

DTC P1431 VACUUM SENSOR FOR HC ABSORBER AND CATALYST SYSTEM CIRCUIT RANGE/PERFORMANCE PROBLEM

DTC Detecting Condition:

CIRCUIT DESCRIPTION

Step 1:

Step 2:

INSPECTION PROCEDURE

HINT:
- If DTCs P1430, P1431, P0110, P0115, P0116, P0120, P0121 are output simultaneously, E2 (sensor ground) may be open.
- Read freeze frame data using hand-held tester. Because freeze frame records the engine conditions when the 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.
- When a bypass valve has a trouble, it is possible that DTC P1341 will be detected ahead of DTC P1436, and P1437, 50 in case that P1431 even if they are not memorized.