Faulty barometric pressure sensor integrated into the mass airflow (MAF) sensor or engine control module (ECM).; Wiring damage (open, short, or high resistance) between the BARO sensor and the ECM.; Corroded or loose electrical connector at the BARO sensor or ECM.; Vacuum leak or blockage in the sensor's pressure port or hose.; Contaminated sensor element due to dirt, oil, or moisture ingress.; ECM internal fault causing incorrect interpretation of the sensor signal.; Aftermarket air intake or modifications that affect sensor readings.

DTC codes / Suzuki codes / P1450

P1450 · SuzukiBarometric Pressure Sensor Too Low Or Too High

Q: What does code P1450 mean?

Barometric Pressure Sensor Too Low Or Too High. P1450 on Suzuki vehicles means the engine control module (ECM) has detected a barometric pressure (BARO) sensor signal that is outside the expected range for the current conditions. The ECM compares the BARO reading with other pressure sensors and expects a plausible value; when the voltage or calculated pressure is too low or too high, it stores this code and illuminates the check engine light.

P1450 on Suzuki vehicles means the engine control module (ECM) has detected a barometric pressure (BARO) sensor signal that is outside the expected range for the current conditions. The ECM compares the BARO reading with other pressure sensors and expects a plausible value; when the voltage or calculated pressure is too low or too high, it stores this code and illuminates the check engine light.

SystemPowertrain

Code typeSuzuki specific

SeverityMedium

Fix difficultyIntermediate

AreaAuxiliary emission controls

Symptoms you may notice

Check engine light illuminated, often with no other noticeable symptoms.
Rough idle or poor engine performance if the BARO signal is far off.
Reduced fuel economy due to incorrect air density calculations.
Hesitation or stumble during acceleration in some cases.
In rare instances, the engine may stall or be hard to start.

Common causes, most likely first

Faulty barometric pressure sensor integrated into the mass airflow (MAF) sensor or engine control module (ECM).
Wiring damage (open, short, or high resistance) between the BARO sensor and the ECM.
Corroded or loose electrical connector at the BARO sensor or ECM.
Vacuum leak or blockage in the sensor's pressure port or hose.
Contaminated sensor element due to dirt, oil, or moisture ingress.
ECM internal fault causing incorrect interpretation of the sensor signal.
Aftermarket air intake or modifications that affect sensor readings.

How to diagnose and fix it

Use a scan tool to read the BARO value in live data and compare it with actual atmospheric pressure for your altitude.
Visually inspect the BARO sensor (often part of the MAF sensor) and its connector for damage, corrosion, or loose pins.
Check the sensor's vacuum hose or port for cracks, blockage, or disconnection.
Perform a voltage drop test on the sensor's reference, signal, and ground circuits to rule out wiring issues.
If wiring and connections are good, test the sensor with a multimeter or replace it with a known-good unit.
Clear the code and test-drive the vehicle to see if the code returns.
If the code persists after sensor replacement, diagnose the ECM and its programming.

Barometric sensor faults often misdiagnosed

The BARO sensor on many Suzuki models is integrated into the MAF sensor, so a faulty MAF can set P1450 without any MAF-related codes.
A dirty or contaminated MAF sensor can cause incorrect BARO readings, so cleaning the sensor element may resolve the issue before replacement.
Altitude changes can cause temporary BARO deviations, but the ECM should adapt; a persistent code indicates a real fault.
Wiring problems, such as a chafed harness near the intake, are common causes that are often overlooked when only the sensor is replaced.
The ECM may use BARO data for fuel injection and ignition timing, so ignoring the code can lead to poor performance and increased emissions.

Can I keep driving with P1450?

You can generally continue driving with P1450, but avoid aggressive acceleration or heavy loads until the fault is repaired. If you notice rough running or stalling, have the vehicle checked promptly to prevent further issues.

Tools that help

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Guidance is general and written for Suzuki vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.