Dtc P1450 Barometric Pressure Sensor Circuit Malfunction; Dtc P1451 Barometric Pressure Sensor Performance Problem - Suzuki 2000 Grand Vitara SQ625 Service Manual

6-1-116 ENGINE (H25 ENGINE)

DTC P1450 BAROMETRIC PRESSURE SENSOR CIRCUIT MALFUNCTION

DTC P1451 BAROMETRIC PRESSURE SENSOR PERFORMANCE PROBLEM

SYSTEM DESCRIPTION
Barometric pressure sensor is installed in ECM (PCM).
DTC DETECTING CONDITION AND TROUBLE AREA
DTC DETECTING CONDITION
P1450
Barometric pressure sensor voltage is less than 0.1 V or more
than 5.1 V.
P1451
Barometric pressure value does not agree with calculated
barometric pressure.
DTC CONFIRMATION PROCEDURE
NOTE:
Check to make sure that following conditions are satisfied when using this DTC CONFIRMATION PROCE-
DURE.
D Intake air temperature: between 5 C and 70 C (6.8 F and 158 F)
D Atmospheric pressure: higher than 560 mmHg (Altitude: lower than 2790 m (9150 ft))
(1) With ignition switch OFF, connect scan tool.
(2) Turn ON ignition switch and clear DTC by using scan tool if any.
(3) Start engine and warm up to normal operating temperature.
(4) Run engine at idle speed for 30 sec.
(5) Check DTC and pending DTC by using scan tool.
TROUBLE AREA
Barometric pressure sensor in ECM (PCM).
MAP sensor