What is Volvo EC140B Fault Code 140SID2319-2?

Fault Code 140SID2319-2 indicates a data error with SID 2319, which refers to the Fuel Temperature Sensor circuit showing erratic or intermittent signal data. This code is part of Volvo's ECM (Engine Control Module) diagnostic system and specifically monitors the fuel system's temperature sensing capability. The "2" modifier indicates that the sensor is providing inconsistent or unstable readings rather than a complete circuit failure.

This fault is critical for the EC140B because the ECM relies on accurate fuel temperature data to optimize injection timing, calculate fuel density, and adjust combustion parameters. When this sensor provides erratic signals, the engine may run in a protective derate mode, reducing performance and fuel efficiency. For used excavators, this code often surfaces due to age-related sensor degradation or wiring harness issues common in machines with 5,000+ operating hours.

Common Symptoms

• Check Engine Light or warning indicator illuminated on the dash panel
• Reduced engine power or noticeable performance derate, especially during cold starts
• Rough idling or inconsistent engine RPM fluctuations
• Poor fuel economy due to the ECM operating with default fuel temperature values
• Intermittent code activation that clears and returns, indicating a loose connection or failing sensor

Potential Causes

The most common technical causes for SID 2319-2 in used EC140B excavators include:

• Corroded or loose connector pins at the fuel temperature sensor, often caused by moisture ingress in the fuel tank area
• Damaged wiring harness due to vibration or rubbing against chassis components near the fuel filter housing
• Failing fuel temperature sensor with internal resistance drift (common after 6,000+ hours)
• Intermittent ground connection in the sensor circuit due to corrosion on chassis ground points
• ECM software corruption or outdated calibration files (less common but possible in older machines)

How to Troubleshoot and Fix Code 140SID2319-2

Step 1: Visual Inspection Begin by locating the fuel temperature sensor (typically mounted on or near the fuel filter housing). Inspect the sensor connector for corrosion, bent pins, or moisture. Check the wiring harness for signs of chafing, especially where it routes near moving components or sharp edges.

Step 2: Electrical Testing Using a digital multimeter, disconnect the sensor and measure resistance across the sensor terminals. Compare readings against Volvo specifications (typically 2,000-3,000 ohms at 20°C). Test the harness continuity from the sensor connector back to the ECM, checking for opens or shorts to ground. Measure supply voltage at the sensor connector (should read approximately 5 volts with key on, engine off).

Step 3: Monitor Live Data Connect Volvo VCADS (Volvo Construction and Agricultural Diagnostic System) or compatible diagnostic software. Monitor live fuel temperature readings while wiggling connectors and harnesses. Erratic values during manipulation confirm wiring issues rather than sensor failure.

Step 4: Replace or Repair For used excavators, clean all connector contacts with electrical contact cleaner and apply dielectric grease before attempting sensor replacement. If harness damage is found, repair with heat-shrink solder connectors rather than simple crimps. Replace the fuel temperature sensor only after confirming electrical circuit integrity to avoid unnecessary parts replacement.

Disclaimer: This guide provides general troubleshooting information. Always consult the official Volvo service manual for your specific machine serial number and consider professional diagnostic assistance for complex electrical issues.