What does code P1420 mean?

Q: What does code P1420 mean?

Intake Air Low Pressure Switch Circuit Low Voltage. P1420 on Chrysler vehicles means the powertrain control module (PCM) has detected a low-voltage condition on the intake air low-pressure switch circuit, which monitors the pressure drop across the air cleaner or intake tract. The PCM expects a specific voltage range from this switch when the engine is running, and a sustained low voltage tells it that the switch is either stuck closed, the circuit is shorted to ground, or the reference signal is being pulled down.

DTC codes / Chrysler codes / P1420

P1420 · ChryslerIntake Air Low Pressure Switch Circuit Low Voltage

P1420 on Chrysler vehicles means the powertrain control module (PCM) has detected a low-voltage condition on the intake air low-pressure switch circuit, which monitors the pressure drop across the air cleaner or intake tract. The PCM expects a specific voltage range from this switch when the engine is running, and a sustained low voltage tells it that the switch is either stuck closed, the circuit is shorted to ground, or the reference signal is being pulled down.

SystemPowertrain

Code typeChrysler specific

SeverityLow

Fix difficultyIntermediate

AreaAuxiliary emission controls

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