What is Liebherr Excavator Fault Code E113?

Fault Code E113 on Liebherr excavators indicates a malfunction in the Engine Oil Pressure Sensor Circuit or abnormally low engine oil pressure detected by the Electronic Control Module (ECM). This diagnostic trouble code (DTC) is triggered when the ECM receives voltage signals outside the expected range from the oil pressure sensor, or when actual oil pressure falls below the manufacturer's minimum threshold during engine operation.

This code is critical for Liebherr machines because insufficient oil pressure can lead to catastrophic engine damage within minutes. The lubrication system protects high-load components like crankshaft bearings, camshafts, and turbocharger assemblies. When E113 activates, the ECM may initiate engine derate or automatic shutdown protocols to prevent irreversible mechanical failure, making immediate diagnosis essential for equipment longevity.

Common Symptoms

When Code E113 is active, operators typically experience:

• Engine warning light or oil pressure warning indicator illuminated on the instrument cluster
• Automatic engine shutdown or refusal to start, particularly on newer Liebherr models with advanced protection systems
• Engine derate mode limiting RPM and hydraulic performance to 60-70% capacity
• Audible alarm from the cab warning system during initial code detection
• Rough idling or unusual valve train noise if actual oil pressure is critically low

Potential Causes

The most common technical reasons for E113 on used Liebherr excavators include:

• Failed oil pressure sensor due to internal diaphragm wear or contamination (extremely common after 5,000+ hours)
• Damaged wiring harness or corroded connector pins at the sensor, especially where harnesses contact frame rails or engine mounts
• Low engine oil level or use of incorrect viscosity oil for operating temperature ranges
• Worn oil pump or clogged oil filter/pickup screen restricting flow in high-hour machines
• ECM calibration issues or software glitches requiring parameter updates
• Blocked oil galleries from sludge accumulation in poorly maintained used equipment

How to Troubleshoot and Fix Code E113

Step 1: Visual Inspection and Oil Level Verification Check engine oil level using the dipstick with the machine on level ground. Inspect oil condition for contamination or metallic particles indicating internal wear. Examine the oil pressure sensor (typically located near the oil filter housing) and its wiring harness for physical damage, oil contamination on connectors, or wire chafing at common rub points.

Step 2: Electrical Testing of Sensor Circuit Using a digital multimeter, disconnect the oil pressure sensor connector and measure resistance across sensor terminals (typical specification: 50-250 ohms depending on temperature). Check for supply voltage at the harness connector (should read 5V reference from ECM). Inspect for short circuits to ground or open circuits in the wiring between sensor and ECM.

Step 3: Mechanical Oil Pressure Verification Install a mechanical oil pressure gauge in place of the sensor to verify actual pressure (Liebherr specification typically 3-5 bar at operating temperature). If mechanical pressure is adequate but E113 persists, replace the oil pressure sensor. If pressure reads low, inspect the oil pump, filter housing for restrictions, and consider oil viscosity issues.

Step 4: Used Equipment Specific Checks For used excavators, thoroughly inspect harness routing for previous repair attempts or zip-tie modifications that create new wear points. Clean all connector pins with electrical contact cleaner and apply dielectric grease. Check for ECM software updates using Liebherr LiDat diagnostic software, as older firmware versions had known sensitivity issues with E113 triggering.

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Disclaimer: This guide provides general troubleshooting information. Always consult the official Liebherr service manual for your specific model and serial number. Complex electrical diagnostics and internal engine repairs should be performed by certified Liebherr technicians with proper diagnostic equipment.