What is Sumitomo SH210-6 Fault Code 217?

Fault Code 217 on the Sumitomo SH210-6 excavator indicates a malfunction in the hydraulic pump pressure sensor circuit or an abnormal pressure reading from the main hydraulic pump system. This diagnostic trouble code (DTC) is triggered when the Electronic Control Module (ECM) detects voltage signals outside the expected range from the pump pressure sensor, or when actual hydraulic pressure deviates significantly from programmed parameters.

This code is critical for the SH210-6 because the hydraulic pump pressure sensor provides real-time feedback to the machine's control system, enabling proper load-sensing and flow compensation. When this sensor circuit fails, the excavator cannot accurately regulate hydraulic output, potentially leading to reduced performance, component damage, or complete hydraulic system shutdown to prevent catastrophic failure.

Common Symptoms

When Code 217 is active on your Sumitomo SH210-6, operators typically experience:

• Warning light illumination on the instrument cluster, often accompanied by an audible alarm
• Reduced hydraulic power across all functions (boom, arm, bucket, and swing operations feel sluggish)
• Erratic implement response where attachments move inconsistently or with jerky motion
• Engine derating or automatic RPM reduction as the ECM enters a protective mode
• Complete loss of hydraulic function in severe cases where the system enters failsafe mode

Potential Causes

The most common technical reasons for Code 217 on used SH210-6 excavators include:

• Faulty hydraulic pump pressure sensor due to internal component wear or contamination from hydraulic fluid debris
• Damaged or corroded wiring harness at the sensor connector, particularly at known rub points near the pump mounting bracket
• Loose or corroded electrical connections at the sensor plug or ECM terminals
• Failed ECM internal circuitry affecting the sensor input channel (less common but occurs in high-hour machines)
• Actual hydraulic pump wear causing abnormal pressure readings that trigger the code legitimately
• Contaminated hydraulic oil with metal particles affecting sensor operation

How to Troubleshoot and Fix Code 217

Step 1: Visual Inspection Begin by locating the hydraulic pump pressure sensor on the main pump assembly. Inspect the wiring harness from sensor to ECM for visible damage, chafing, or oil contamination. On used excavators, check specifically where the harness passes near rotating components or sharp metal edges. Disconnect the sensor connector and examine both male and female terminals for corrosion, bent pins, or moisture intrusion.

Step 2: Electrical Testing Using a digital multimeter, perform a resistance check on the pressure sensor. With the sensor disconnected, measure resistance across the sensor terminals—typical values range from 200-500 ohms (consult your service manual for exact specifications). Next, check for supply voltage at the harness connector with ignition on; you should see approximately 5 volts on the signal wire. Measure continuity from the sensor connector back to the ECM to identify any open circuits.

Step 3: Signal Testing and Component Replacement Connect Sumitomo diagnostic software (or compatible scan tool) to monitor live sensor data. With the engine running at idle, the pressure sensor should display 0-50 bar. Increase throttle and observe if pressure readings respond proportionally. If readings are erratic, frozen, or out of range despite good electrical connections, replace the pressure sensor. For used machines, always install a new O-ring seal and apply dielectric grease to connectors. After replacement, clear the code, cycle the machine through all functions, and verify the fault does not return.

Step 4: Hydraulic System Verification If electrical components test satisfactorily, investigate actual hydraulic system pressure using a mechanical pressure gauge installed at the test port. Compare readings against specifications (typically 320-350 bar maximum). Low pressure indicates pump wear requiring rebuild or replacement.

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Disclaimer: This guide provides general troubleshooting information for experienced technicians. Always consult the official Sumitomo service manual for your specific serial number. If you lack proper diagnostic tools or experience with high-pressure hydraulic systems, consult a certified Sumitomo dealer or qualified heavy equipment technician to prevent injury or further machine damage.