Faulty fuel level sensor 2 (in-tank unit) due to wear or contamination; Damaged or corroded wiring harness at the sensor connector or along the frame; Open circuit or high resistance in the sensor ground circuit; Short to ground in the signal wire between sensor and PCM; Failed fuel pump module assembly affecting sensor operation; Corrosion or water intrusion in the electrical connector; PCM internal fault (rare, but possible after other causes ruled out)

DTC codes / Chrysler codes / P1432

P1432 · ChryslerFuel Level Sensor 2 Circuit Low Voltage

Q: What does code P1432 mean?

Fuel Level Sensor 2 Circuit Low Voltage. P1432 on a Chrysler vehicle means the powertrain control module (PCM) has detected a low-voltage condition on the fuel level sensor 2 circuit, which typically monitors the secondary side of a dual-tank fuel system. The PCM expects a voltage signal within a specific range as the fuel level changes, and a sustained low reading indicates a short to ground, an open circuit, or a failed sensor.

P1432 on a Chrysler vehicle means the powertrain control module (PCM) has detected a low-voltage condition on the fuel level sensor 2 circuit, which typically monitors the secondary side of a dual-tank fuel system. The PCM expects a voltage signal within a specific range as the fuel level changes, and a sustained low reading indicates a short to ground, an open circuit, or a failed sensor.

SystemPowertrain

Code typeChrysler specific

SeverityLow

Fix difficultyIntermediate

AreaAuxiliary emission controls

Symptoms you may notice

Fuel gauge reads empty or fluctuates erratically, especially when switching between tanks
Check Engine Light (CEL) illuminated on the dashboard
Often no symptoms besides the warning light, with normal driveability
Incorrect fuel level display leading to premature low-fuel warning
Possible fuel transfer or tank switching issues on dual-tank models

Common causes, most likely first

Faulty fuel level sensor 2 (in-tank unit) due to wear or contamination
Damaged or corroded wiring harness at the sensor connector or along the frame
Open circuit or high resistance in the sensor ground circuit
Short to ground in the signal wire between sensor and PCM
Failed fuel pump module assembly affecting sensor operation
Corrosion or water intrusion in the electrical connector
PCM internal fault (rare, but possible after other causes ruled out)

How to diagnose and fix it

Connect a scan tool and read live data for fuel level sensor 2 voltage to confirm the low reading
Visually inspect the sensor connector and wiring for corrosion, chafing, or loose pins
Measure resistance across the sensor terminals and compare to specification while moving the float arm
Check for continuity and short to ground on the signal and ground wires between sensor and PCM
If wiring is good, remove the fuel pump module and inspect the sensor for mechanical binding or contamination
Replace the fuel level sensor or fuel pump module assembly if resistance is out of range
Clear the code and verify the fuel gauge operates correctly through a full sweep

Dual-Tank Chrysler Fuel Gauge Quirks

On Chrysler vehicles with dual fuel tanks, sensor 2 often monitors the secondary tank, and a failed sensor can cause the gauge to default to empty even when fuel is present.
A common misdiagnosis is replacing the fuel pump when the actual fault is a chafed wire near the tank mounting bracket or a corroded ground connection.
The PCM may set P1432 intermittently if the fuel level sensor signal is lost only during tank switching, so road-testing while monitoring live data is crucial.
Aftermarket fuel pump assemblies sometimes have incompatible sensor resistance curves, leading to repeated P1432 even after replacement.
This code does not always indicate a sensor failure; a weak battery or charging system issue can cause low reference voltage and trigger P1432.

Can I keep driving with P1432?

The vehicle remains safe to drive because this fault only affects fuel level reporting, but you should refuel based on mileage rather than the gauge until repaired. Avoid running the tank dry, which can strain the fuel pump and cause additional codes.

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.