What is XCMG XE750D Fault Code E1410 (SPN4364 FMI2)?

Fault Code E1410 (SPN4364 FMI2) indicates that the Engine Control Module (ECM) has detected erratic or intermittent data from the Aftertreatment Diesel Exhaust Fluid (DEF) Pressure Sensor. This code specifically relates to SPN 4364 (DEF Pressure) with Failure Mode Indicator (FMI) 2, which signals irregular, intermittent, or incorrect electrical signals from the sensor circuit.

In the XCMG XE750D excavator, the DEF pressure sensor monitors the pressure within the Selective Catalytic Reduction (SCR) system to ensure proper urea injection for emissions control. When the ECM receives unstable voltage signals from this sensor, it cannot accurately regulate DEF dosing, potentially leading to increased emissions and engine performance issues. This is critical because modern Tier 4 Final/Stage V engines like those in the XE750D rely heavily on precise SCR system operation to meet environmental standards while maintaining optimal power output and fuel efficiency.

Common Symptoms

• Check Engine Light (CEL) or Malfunction Indicator Lamp (MIL) illuminated on the dashboard
• Engine derate or reduced power mode activated after prolonged fault presence (typically after multiple ignition cycles)
• DEF system warning messages displayed on the operator monitor
• Possible increased DEF consumption or inconsistent DEF usage patterns
• Intermittent fault logging where the code appears and disappears without obvious pattern changes

Potential Causes

The most common technical causes for Code E1410 in used XCMG XE750D excavators include:

• Corroded or damaged wiring harness connections at the DEF pressure sensor connector, especially due to environmental exposure near the exhaust system
• Faulty DEF pressure sensor experiencing internal electrical failures or contamination from crystallized urea
• Intermittent short circuits or open circuits in the sensor wiring caused by harness chafing against chassis components or exhaust shields
• Poor ground connections at the sensor or ECM ground points due to corrosion buildup
• ECM software issues requiring calibration updates (less common but possible in earlier production units)
• Water intrusion into sensor connectors from washing or working in wet conditions

How to Troubleshoot and Fix Code E1410

Step 1: Visual Inspection and Connection Check Begin by locating the DEF pressure sensor on the SCR dosing module near the DEF tank. Inspect the sensor connector for corrosion, bent pins, or moisture. On used excavators, pay special attention to harness routing near hot exhaust components where insulation may have degraded. Disconnect and reconnect the connector several times while applying dielectric grease to ensure proper contact.

Step 2: Electrical Testing with Diagnostic Tools Using a digital multimeter (DMM), perform a resistance check on the sensor wiring from the connector back to the ECM (typically should read less than 5 ohms for continuity). Check for voltage supply at the sensor connector with the key on, engine off—you should see approximately 5 volts reference voltage from the ECM. Use XCMG diagnostic software or compatible tools like Jaltest or Cummins Insite (depending on engine manufacturer) to monitor live sensor data and check for intermittent signal dropout.

Step 3: Component Replacement and System Reset If wiring tests pass but the fault persists, replace the DEF pressure sensor with a genuine XCMG or OEM-equivalent part. Before installation, inspect the DEF dosing module for crystallized urea buildup that could affect sensor operation. After replacement, clear fault codes using diagnostic software and perform a stationary regeneration if available to verify proper SCR system operation. For used machines, always inspect harness protection and add additional loom protection or heat shielding if wear patterns are evident.

Disclaimer: This guide provides general troubleshooting information. Always consult the XCMG XE750D service manual and consider professional diagnostic assistance for complex electrical issues. Improper repairs to emissions systems may violate environmental regulations.