Faulty barometric pressure sensor (often integrated into the mass airflow sensor on some Chrysler engines); Damaged or corroded wiring harness or connector at the sensor; Open or shorted circuit in the sensor signal or ground wire; Poor electrical connection at the PCM connector; Failed PCM (rare but possible after other causes are ruled out); Contamination or blockage of the sensor port (if remote-mounted)

DTC codes / Chrysler codes / P1450

P1450 · ChryslerBarometric Pressure Sensor Circuit

Q: What does code P1450 mean?

Barometric Pressure Sensor Circuit. P1450 on a Chrysler vehicle means the powertrain control module (PCM) has detected an electrical fault in the barometric pressure sensor circuit, which measures atmospheric pressure for fuel and altitude calculations. The PCM compares the sensor signal against expected values and sets this code when the voltage or rationality check falls outside the normal range.

P1450 on a Chrysler vehicle means the powertrain control module (PCM) has detected an electrical fault in the barometric pressure sensor circuit, which measures atmospheric pressure for fuel and altitude calculations. The PCM compares the sensor signal against expected values and sets this code when the voltage or rationality check falls outside the normal range.

SystemPowertrain

Code typeChrysler specific

SeverityLow

Fix difficultyIntermediate

AreaAuxiliary emission controls

Symptoms you may notice

Illumination of the check engine light, often with no other noticeable symptoms
Rough idle or poor driveability at high altitudes due to incorrect fuel mixture
Reduced fuel economy as the PCM substitutes a default pressure value
Hesitation or stumble during acceleration in some cases
In rare instances, a no-start condition if the sensor signal is completely lost

Common causes, most likely first

Faulty barometric pressure sensor (often integrated into the mass airflow sensor on some Chrysler engines)
Damaged or corroded wiring harness or connector at the sensor
Open or shorted circuit in the sensor signal or ground wire
Poor electrical connection at the PCM connector
Failed PCM (rare but possible after other causes are ruled out)
Contamination or blockage of the sensor port (if remote-mounted)

How to diagnose and fix it

Connect a scan tool and read live data for barometric pressure to compare with actual altitude pressure
Inspect the sensor and its connector for corrosion, loose pins, or physical damage
Check the sensor reference voltage and ground at the connector with a multimeter
Perform a wiggle test on the harness while monitoring sensor voltage to find intermittent faults
If the sensor is integrated with the mass airflow sensor, test or replace the entire unit as needed
Verify continuity and resistance of the signal circuit between the sensor and PCM
Clear the code and test-drive to confirm the repair, replacing the PCM only as a last resort

Barometric sensor faults often misdiagnosed

On many Chrysler engines, the barometric pressure sensor is built into the mass airflow sensor, so a faulty MAF can set P1450 without any separate baro sensor.
A dirty or contaminated MAF sensor element can skew the barometric reading, leading to P1450 even when the electrical circuit tests good.
Altitude changes during driving can cause the PCM to set P1450 if the sensor response is slow or erratic, so testing at different elevations helps.
Corroded grounds or a weak battery can cause false P1450 codes; always check battery voltage and ground connections before replacing parts.
The PCM may use a default barometric value when the sensor fails, allowing the engine to run but with reduced performance and fuel economy.

Can I keep driving with P1450?

The vehicle is generally safe to drive with P1450 because the PCM substitutes a default pressure value, but you may notice reduced performance or fuel economy. Avoid sustained high-altitude driving or heavy load until the fault is repaired, as the engine may run poorly.

Tools that help

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