John Deere 102.03 – Engine Control Unit (ECU): Intake Manifold Pressure Sensor Signal High
Issue description
The measured boost/intake manifold pressure signal voltage exceeds the normal operating range (typically greater than 4.75V or 4.9V). This deprives the engine management system of accurate air intake data, causing the engine to use a default low-pressure value, enter a derated state, and disable Active Exhaust Filter cleaning.
Applies to these machines
65 machines- 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
- 5E Series
- 5M Series
- 6R Series
- 6M Series
- 6110R-6215R
- 7R Series
- 8R Series
- 8RT Series
- 8RX Series
- 9R Series
- 9RT Series
- 9RX Series
- 8130
- 8230
- 8330
- 8430
- 8530
- 9570 STS
- 9660 STS
- 9760 STS
- S-Series
- S670
- S760
- S780
- W-Series
- T-Series
- 7180
- 7280
- 7380
- 7480
- 7580
- 7780
- 7980
- 250D
- 370E
- 460E
- 210G
- 250G
- 300G
Check the cause
Check the sensor wiring harness for a short circuit to a high voltage source or an open circuit (most common cause)
Verify the sensor's power supply voltage from the ECU is correct and check for blown fuses on the supply lines
Determine if the engine is being overfueled, which can cause erratic manifold pressure readings
Confirm that the correct intake manifold pressure sensor part number is currently installed on the machine
Repair steps
Safety First
Turn off the engine, remove the key, and disconnect the battery power before servicing the sensor to prevent electrical shorts.
Locate the Sensor
Find the Intake Manifold Pressure Sensor (MAP sensor), which is typically mounted directly to the intake manifold.
Inspect and Clean
Disconnect the electrical connector. Clean the connector pins and inspect for corrosion, moisture, or pushed-back pins.
Test the Sensor
Using a multimeter, verify the voltage at the sensor connector. If the wiring is intact, the power supply is correct, and the signal wire is still reading above 4.75V–4.9V, the sensor has failed internally.
Remove the Defective Sensor
Unthread or unbolt the sensor from the manifold. Clean the mounting area thoroughly to prevent contamination.
Install the New Sensor
Install the replacement sensor (apply thread sealant only if specified by the OEM design for your specific engine).
Reconnect
Plug the electrical harness back into the sensor, ensuring the connector clicks into place securely.
Clear Codes
Reconnect the battery. Use a compatible John Deere diagnostic tool (like Service ADVISOR) or the in-cab display to clear the stored 000102.03 fault code.
Test Operation
Start the engine and verify that the sensor readings are normal and the derate condition has been lifted.
Parts you might need
(8)Intake Manifold Pressure Sensor
DZ124649Fits many modern 6R, 7R, 8R, 9R tractors, S-Series combines, and self-propelled sprayers.
Intake Manifold Pressure Sensor
RE522723Fits 6030, 7030, 8030 series tractors, and various construction equipment (Excavators, Graders, Dozers).
Intake Manifold Pressure Sensor
RE542461Common on various mid-size agricultural tractors.
Intake Manifold Pressure Sensor
DZ111915Common on various mid-size agricultural tractors.
Intake Manifold Pressure Sensor
RE527370Fits specific construction equipment like the 370E Articulated Dump Truck.
Intake Manifold Pressure Sensor
RE67915Older MAP sensor assemblies for various John Deere platforms.
Intake Manifold Pressure Sensor
RE230615Older MAP sensor assemblies for various John Deere platforms.
Intake Manifold Pressure Sensor
RE557768Often cross-referenced with Bosch OEM part 0281006134.
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