What is Doosan DX215-9C Fault Code E000108-04 (P2228)?

Fault Code E000108-04 (P2228) on the Doosan DX215-9C indicates a Barometric Pressure (BARO) Sensor Circuit Low Input condition. This diagnostic trouble code (DTC) is triggered when the Engine Control Module (ECM) detects an abnormally low voltage signal from the barometric pressure sensor, which measures atmospheric pressure to optimize fuel injection and air-fuel ratios.

This sensor is critical for the DX215-9C's Tier 4 emissions-compliant engine. The ECM uses barometric pressure data to compensate for altitude changes and ensure proper combustion efficiency. When the sensor circuit reads below the manufacturer's specified voltage threshold (typically below 0.5V), the system cannot accurately adjust fuel delivery, potentially causing performance degradation and increased emissions.

Common Symptoms

When Code E000108-04 is active, operators may experience:

• Check Engine Light (CEL) illuminated on the instrument cluster with fault code displayed
• Reduced engine power or derate mode, limiting machine performance to protect the engine
• Rough idle or hesitation during acceleration, especially at higher altitudes
• Black smoke from exhaust due to improper fuel-air mixture compensation
• Difficulty starting in cold conditions or at elevated work sites

Potential Causes

The most common technical reasons for this fault code on used DX215-9C excavators include:

• Failed barometric pressure sensor due to internal component degradation (common after 5,000+ hours)
• Damaged or corroded wiring harness between the BARO sensor and ECM, particularly at connector pins
• Shorted sensor circuit to ground caused by harness rubbing against frame or hydraulic lines near the engine valley
• Corroded or loose connector terminals at the sensor or ECM side (moisture ingress is common on used machines)
• ECM internal fault (rare, but possible on high-hour machines with electrical system damage)
• Aftermarket sensor installation with incorrect voltage output specifications

How to Troubleshoot and Fix Code E000108-04 (P2228)

Step 1: Visual Inspection Locate the BARO sensor (typically mounted on the engine block or intake manifold area). Inspect the wiring harness for visible damage, abrasion points where cables contact metal surfaces, and check connector pins for corrosion or bent terminals. On used excavators, pay special attention to harness routing near vibration points.

Step 2: Electrical Testing Using a digital multimeter, backprobe the BARO sensor connector with the ignition ON, engine OFF. Measure the supply voltage (should read approximately 5V) and signal voltage (typically 3.5-4.5V at sea level). If readings are below 0.5V or show infinite resistance, proceed to check circuit continuity between sensor and ECM pins per Doosan service manual specifications.

Step 3: Component Testing Disconnect the sensor and measure its internal resistance (typically 1-5kΩ depending on temperature). Compare against factory specifications. If out of range, replace with a genuine Doosan OEM sensor to avoid voltage mismatch issues. Clear codes using Doosan G-SCAN diagnostic software and perform a test run under load.

Step 4: Harness Repair If sensor tests good but voltage remains low, trace the signal wire for shorts to ground. Repair any damaged sections with proper gauge wire and heat-shrink connectors. Apply dielectric grease to all connections to prevent future corrosion on used equipment.

---

Disclaimer: This guide provides general troubleshooting information. Always consult the Doosan DX215-9C service manual and consider professional diagnosis for complex electrical issues. Improper repairs may cause further damage or safety hazards.