DTC P1450: Barometric Pressure Sensor, Low Or High Input, Or DTC P1451: Barometric Pressure Sensor Performance Problem: Condition

DTC P1450 is set when Engine Control Module (ECM) detects that barometric pressure sensor output voltage is less than 0.1 volts or more 5.1 volts. DTC P1451 is set when barometric pressure calculated using Manifold Differential Pressure (MDP) sensor does not match barometric pressure sensor output voltage. MIL is illuminated when ECM detects malfunction during 2 consecutive drive cycles. Possible causes are:

• Barometric pressure sensor malfunction.
• MDP sensor malfunction.