What is XCMG XE490D (CM2150C-CM2150D) Fault Code 2352?

Fault Code 2352 indicates an Engine Position Sensor (Camshaft Position Sensor) Circuit Intermittent Signal detected by the Cummins CM2150 ECM. This diagnostic trouble code means the Engine Control Module (ECM) is receiving an irregular or unstable signal from the camshaft position sensor, which monitors the precise rotational position and speed of the camshaft for fuel injection timing and engine synchronization.

This code is critical for the XCMG XE490D because the CM2150 engine relies on accurate camshaft position data to control injection timing, fuel delivery, and emissions systems. An intermittent signal can cause erratic engine behavior, reduced performance, and potential engine protection modes that limit machine productivity on job sites.

Common Symptoms

When Code 2352 is active on your XCMG excavator, operators typically experience:

• Check Engine Light (CEL) or Malfunction Indicator Lamp (MIL) illuminated on the instrument cluster
• Intermittent rough idle or engine stumbling, especially during warm-up or load transitions
• Reduced engine power or activation of derate mode limiting RPM and hydraulic performance
• Hard starting conditions or extended cranking time, particularly when the engine is hot
• Engine stalling at idle or during low-speed hydraulic operations

Potential Causes

The most common technical causes for Code 2352 on used XCMG excavators with CM2150 engines include:

• Corroded or loose electrical connectors at the camshaft position sensor (common in machines with 3,000+ operating hours)
• Damaged sensor wiring harness due to vibration, heat exposure, or rubbing against engine components near the timing case
• Failing camshaft position sensor with internal circuit degradation causing intermittent signal dropout
• Poor ground connections at the ECM or sensor ground circuits due to corrosion or loose mounting bolts
• ECM software calibration issues or outdated firmware requiring updates (less common but possible)
• Contaminated sensor face from oil leaks or metallic debris affecting magnetic signal strength

How to Troubleshoot and Fix Code 2352

Step 1: Visual Inspection and Connector Check Begin by locating the camshaft position sensor on the engine timing case (driver's side, near the front). Disconnect the sensor connector and inspect for corrosion, bent pins, moisture intrusion, or oil contamination. Clean contacts with electrical contact cleaner and apply dielectric grease. On used excavators, check the entire wiring harness from sensor to ECM for chafing, heat damage, or signs of previous repairs.

Step 2: Electrical Testing with Multimeter Using a digital multimeter (DVOM), perform a resistance check across the sensor terminals (typically 200-1,000 ohms depending on sensor temperature—consult Cummins specifications). Check for voltage supply from the ECM (usually 5V or 8V reference). Test harness continuity from sensor connector to ECM pins, and verify ground circuit resistance is below 5 ohms. Wiggle the harness while monitoring readings to identify intermittent opens or shorts.

Step 3: Sensor Replacement and Advanced Diagnostics If electrical tests are inconclusive, replace the camshaft position sensor with a genuine Cummins or OEM-equivalent part. After installation, clear codes using Cummins INSITE diagnostic software and perform a road/load test. If Code 2352 returns, inspect the camshaft reluctor ring for damage or debris, check ECM mounting grounds, and verify ECM calibration is current. For persistent issues on high-hour used machines, consider ECM connector inspection for terminal tension and corrosion.

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Disclaimer: This guide provides general troubleshooting information for Code 2352. Always consult the official XCMG and Cummins service manuals for your specific machine serial number. Complex electrical diagnostics should be performed by qualified diesel technicians with proper diagnostic tools and safety equipment.