Kobelco SK140LC-8 Fault Code E013: Complete Diagnostic Guide

What is Kobelco SK140LC-8 Fault Code E013?

Fault Code E013 on the Kobelco SK140LC-8 indicates a malfunction in the engine oil pressure sensor circuit or abnormally low engine oil pressure detection. This code is triggered when the Electronic Control Module (ECM) receives readings outside the normal voltage range from the oil pressure sensor, or when actual oil pressure falls below the manufacturer's specified threshold during operation.

The oil pressure monitoring system is critical for the SK140LC-8's Hino J05E engine, as insufficient lubrication can cause catastrophic internal damage to bearing surfaces, camshafts, and crankshaft assemblies. The ECM continuously monitors oil pressure to prevent engine seizure and ensure longevity, making this code particularly important on used machines where oil system wear may be advanced.

Common Symptoms

When Code E013 is active on your SK140LC-8, you may experience:

• Warning light or alarm illuminated on the instrument panel (typically a red oil can icon)
• Engine derating or power limitation to protect internal components from damage
• Engine shutdown in severe cases, especially if actual oil pressure is critically low
• Abnormal engine noise such as ticking, knocking, or valve train clatter indicating lubrication issues
• Erratic oil pressure gauge readings or gauge stuck at zero despite engine running

Potential Causes

Several technical failures commonly trigger E013 on used SK140LC-8 excavators:

• Failed oil pressure sensor – common on machines with 4,000+ hours due to heat cycling and vibration
• Damaged or corroded wiring harness at connector points near the engine block where heat and oil contamination occur
• Low engine oil level from leaks, consumption, or inadequate maintenance
• Worn oil pump producing insufficient pressure, especially during cold starts on older machines
• Clogged oil filter or pickup screen restricting oil flow
• ECM voltage supply issues causing erroneous sensor readings
• Mechanical engine wear including worn main/rod bearings increasing oil clearances

How to Troubleshoot and Fix Code E013

Step 1: Verify Actual Oil Condition and Level Check engine oil level with the machine on level ground. Inspect oil quality – metallic particles indicate severe internal wear. Replace oil and filter if contaminated or low.

Step 2: Inspect Oil Pressure Sensor and Wiring Locate the oil pressure sensor on the engine block (typically near the oil filter housing on the J05E engine). Check the connector for corrosion, oil contamination, or damaged pins. On used excavators, this connector frequently suffers from heat damage and oil seepage. Clean connector terminals with electrical contact cleaner and inspect harness for chafing against engine components.

Step 3: Test Sensor Voltage and Resistance Using a digital multimeter, check sensor supply voltage (should be approximately 5V with key on). Measure sensor resistance according to Kobelco specifications. Compare readings to factory values – typical resistance ranges from 50-250 ohms depending on temperature.

Step 4: Perform Mechanical Oil Pressure Test Install a mechanical oil pressure gauge in place of the sensor. Run engine at operating temperature and verify actual pressure meets specifications (typically 30-60 PSI at idle, 45-85 PSI at rated RPM). Low readings indicate pump wear or internal engine problems requiring mechanical repair.

Step 5: Clear Code and Monitor After repairs, clear the fault code using Kobelco diagnostic software or compatible scan tool. Operate the machine under load and monitor for code recurrence.

Disclaimer: This guide provides general troubleshooting information. Always consult the official Kobelco service manual and consider professional diagnosis for complex engine issues, especially on used equipment where multiple system failures may be present.