P1374 Code Cadillac – 3X Reference Circuit

Code P1374 Cadillac Description

The Cadillac diagnostic code P1374 (DTC) refers to a problem with the 3X reference circuit. In Cadillac vehicles, this code indicates an issue with the 3X reference signal which is essential for the proper functioning of the engine management system. The 3X reference signal is used by the Engine Control Module (ECM) to determine the engine’s position and speed, thus helping to ensure correct ignition timing and fuel delivery.

Common Causes of Cadillac Code P1374

NOTE: The listed causes may not be a complete list of all potential problems and there could be other causes.

1. Damaged or corroded wiring in the 3X reference circuit
2. Loose connections in the circuit
3. Short circuits in the wiring
4. Faulty sensors
5. ECM malfunction

Symptoms of P1374 Cadillac

1. Rough idle
2. Misfires
3. Hesitation during acceleration
4. Stalling
5. Difficulty starting the engine

How to Fix Cadillac Code P1374

1. Start by performing a thorough inspection of the 3X reference circuit, checking for any visible damage or loose connections.
2. Test the sensors and components associated with the circuit to identify faulty parts.
3. Use a multimeter to check the continuity and resistance of the circuit wiring.
4. Repair or replace damaged wires, connectors, sensors, or the ECM as needed.
5. Clear the DTC and perform a road test to ensure the issue has been resolved.