JCB P2413-81 – Engine ECU: CAN Bus Message Error for EGR Faults from Engine

The Engine Control Unit (ECU) has detected a problem with the Exhaust Gas Recirculation (EGR) system's operation and is attempting to send error data over the CAN bus network, but the message is invalid or not being received correctly. While the root cause is often a mechanical or electrical issue with the EGR system itself, the code specifically points to a communication breakdown. The engine will likely enter a Reduced Power Mode or Derate as a protective measure.

• JCB EcoMAX Tier 4 engines
• Tier 4 JCB loaders
• JS115
• JS130
• JS145LC
• JS160W

1. 1

   Use JCB ServiceMaster to check for any other active fault codes related to the VGT, intake throttle, or temperature sensors, and address those first

2. 2

   Ensure the engine ECU software is up to date

3. 3

   Inspect the engine wiring harness for damage, rubbing, fraying, or melting, especially around hot components

4. 4

   Inspect the multi-plug connector located on top of the engine for water ingress or pushed-back pins

5. 5

   Disconnect the EGR valve connector and check for corrosion ('green death'), bent pins, or debris

6. 6

   Verify that all machine ground connections are clean and tight

7. 7

   Verify there is a 12V power supply and a solid ground connection at the EGR valve connector

8. 8

   Remove and inspect the TMAP (Temperature Manifold Air Pressure) sensor for carbon soot, which indicates EGR cooler and passage blockages

1. 1

   Record and clear codes

   Note the exact fault code and any others present. Use a diagnostic tool to clear the codes and operate the machine to see if the P2413-81 code returns immediately.

2. 2

   Address CAN communication

   Test for continuity and shorts in the CAN lines between the EGR valve and the Engine ECU. Repair any damaged wires or replace corroded connector pins.

3. 3

   Clean carbon buildup

   If carbon buildup is suspected from the TMAP sensor inspection, remove and clean the EGR valve, EGR cooler, and intake passages. Soak the components in a suitable cleaner to dissolve hardened carbon deposits.

4. 4

   Test EGR valve functionality

   After cleaning, check that the EGR valve moves freely. Perform an active test with a diagnostic tool to command the EGR valve open and closed, verifying its mechanical function.

5. 5

   Replace faulty components

   If the EGR valve is seized, fails to actuate, or has an internal electrical fault, replace it. Replace the TMAP sensor or wiring harness if they are irreparably damaged or faulty.

6. 6

   Final verification

   After any repair or replacement, clear all fault codes and run the machine under load to ensure the P2413-81 code does not reappear.