P1451

SYSTEM DESCRIPTION
Barometric pressure sensor is installed in ECM (PCM).

DTC Detecting Condition And Trouble Area:

DTC CONFIRMATION PROCEDURE

For DTC P1450
1. Connect scan tool to DLC with ignition switch OFF.
2. Turn ON ignition switch and clear DTC by using scan tool and run engine for 1 min.
3. Check DTC by using scan tool.

For DTC P1451

WARNING:
- When performing a road test, select a place where there is no traffic or possibility of a traffic accident and be very careful during testing to avoid occurrence of an accident.
- Road teat should be carried out with 2 persons, a driver and a tester, on a level road.

1. Connect scan tool to DLC with ignition switch OFF.
2. Turn ON ignition switch and clear DTC, pending DTC and freeze frame data by using scan tool and warm up engine to normal operating temperature.
3. Increase engine speed to 3,000 r/min. in 3rd gear in case of M/T and "2" range in case of A/T.
4. Release accelerator pedal and with engine brake applied, keep vehicle coasting for 5 sec. or more. (Keep fuel cut condition for 5 sec. or more) If fuel cut condition is not kept for 5 sec. or more, coast down a slope in engine speed 1600 - 3000 r/min for 5 sec. or more.
5. Stop vehicle and run engine at idle.
6. Repeat steps (3) - (5) 2 times.
7. Check pending DTC by using scan tool.

Step 1 - 3:

TROUBLESHOOTING (DTC P1450/P1451)