John Deere 102.04 – ECU: Intake Manifold Pressure Sensor Signal Low / Manifold Air Pressure Input Voltage Problem / Intake Manifold Pressure Signal Out of Range Low

The controller detects that the voltage signal coming from the intake manifold pressure sensor (which measures the air pressure/boost going into the engine) has dropped below the acceptable lower limit. This typically points to a short to ground in the sensor circuit, a failed sensor, or a wiring harness issue. Symptoms include limited engine power (derate), Active Exhaust Filter cleaning becoming unavailable, and potential total loss of machine availability.

• 5085E
• 5090E
• 5090EL
• 5100E
• 5085M
• 5100M
• 5100MH
• 5100ML
• 5115ML
• 5090M
• 5115M
• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 6R Series
• 7R Series
• 8R Series
• 8RT Series
• 8RX Series
• 8RT 410
• 8130
• 8530
• 9R Series
• 9RT Series
• 9RX Series
• 9230
• 9630
• 5E Series
• 5M Series
• 7000 Series Self-Propelled Forage Harvesters
• 7180
• 7980
• 7350
• 7780
• S7 Series Combines
• T5 Series Combines
• T6 Series Combines
• CP770
• CS770
• 331G Skid Steers
• 370E Articulated Dump Trucks

1. 1

   Live Data Check: Connect a diagnostic scan tool and look at the live data for the intake manifold pressure sensor to see if it is reading abnormally low or flatlining.

2. 2

   Electrical Testing: Use a multimeter (e.g., Fluke meter) and a diagnostic test box to check the sensor circuit. Verify the reference voltage, check the signal wire for a short to ground, and ensure the ground circuit is intact.

3. 3

   Visual Inspection: Inspect the wiring harness and the sensor connector for physical damage, corrosion, or contamination.

4. 4

   Mechanical Check: Check the intake manifold for physical boost or vacuum leaks that could cause abnormal pressure readings.

1. 1

   Preparation

   Disconnect the machine's battery and power before servicing the electrical system.

2. 2

   Locate the Sensor

   Find the intake manifold pressure sensor, which is typically threaded directly into the engine's intake manifold.

3. 3

   Removal

   Disconnect the electrical harness connector from the sensor. Carefully unthread and remove the faulty sensor.

4. 4

   Cleaning

   Clean the mounting area on the manifold thoroughly to prevent contamination.

5. 5

   Installation

   Apply thread sealant to the new sensor if specified by the OEM design. Thread the new sensor into the manifold and tighten it securely.

6. 6

   Reconnection

   Reconnect the electrical harness, ensuring the connector is fully seated and compatible with the OEM harness. Reconnect the battery.

7. 7

   Verification

   Use a compatible diagnostic tool or the machine's display to clear the stored 000102.04 fault code. Start the engine and verify the new sensor's readings via live data to confirm the repair.