P1451

DTC P1451: Barometric Pressure Sensor Circuit Performance Problem

System Description
Barometric pressure sensor is installed in ECM (PCM).

DTC Detecting Condition / Trouble Area:

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

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 test 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 - 52 times.
7. Check pending DTC by using scan tool.

Step 1 - 3:

DTC Troubleshooting