Cat 224-4536 High-Pressure Sensor (Sensor GP-Pressure) is primarily utilized for monitoring high pressure within the common rail fuel systems of heavy-duty engines—such as the C7, C9, and C15 series—serving as a critical component that enables electronic fuel systems to achieve precise control over fuel injection volume. I. Core Parameters and Specifications

Part Number: 224-4536 (2244536)

Official Name: Sensor GP-Pressure (High-Pressure Sensor Assembly)

Function: Real-time monitoring of high-pressure fuel rail pressure; outputs an analog signal to the ECM for closed-loop rail pressure control, fuel injection quantity adjustment, and high-pressure system protection.

Measurement Range: 0–37.4 MPa (0–5424 psi) (Standard range for high-pressure common rail systems)

Electrical Characteristics: 3-pin DT waterproof connector; 5V DC reference voltage; 0.5–4.5V linear output; Operating voltage: 9–32V.

Mechanical Characteristics: Threaded interface: SAE #5M; Material: Stainless steel; Protection rating: IP67; Operating temperature: **-40°C to 125°C**.

Replacement Models: 248-2169, 194-6726, 3PP6-1 (Directly interchangeable).

II. Main Applicable Models

Engine Series: C7, C9, C15, 3126B, 3406E, and other electronically controlled high-pressure common rail engines.

Equipment Models:

Excavators: 322C, 324D, 325C, 330C, 336D, etc.

Wheel Loaders: 924H, 928H, 938G II, 950H, 962H, 966H, etc.

Dozers: D6R, D7R, 814F II, etc.

Others: Motor Graders (12H), Pipelayers (561N), Asphalt Pavers (AP-1055D), etc.

III. Fault Symptoms and Diagnosis

Typical Symptoms:

Insufficient engine power, sluggish acceleration, emission of black smoke.

Difficulty starting, unstable idling, tendency to stall while driving.

Fuel pressure warning alerts; ECM reports fault codes related to rail pressure.

Abnormal increase in fuel consumption.

Common Fault Codes (CAT):

P0087: Fuel rail pressure too low. P0088: Fuel Rail Pressure Too High

P0193: Sensor Signal Voltage Too High / Short Circuit

P0192: Sensor Signal Voltage Too Low / Open Circuit

Quick Check

Verify that the 5V supply voltage is normal.

Measure the output voltage at idle and at full throttle (Idle ≈ 0.8–1.2V; Full Throttle ≈ 3.5–4.2V).

Check the connector for corrosion, looseness, or water intrusion.

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