92.2 SPN 2659/FMI 1
The code is typically an EGR flow target error (low flow).
92.2.1
EGR Low Flow Check
Check as follows:
1. Inspect the EGR delivery pipe for external leaks.
[a] If leaks are found, repair as necessary. Refer to section 92.2.1.1.
[b] If no leaks are found, go to step 2.
2. Inspect the Delta P pressure tubes for damage or plugging.
[a] If damage or plugging is found, repair as necessary. Refer to section 92.2.1.1.
[b] If no damage is found, go to step 3.
3. Remove the EGR Delta P Sensor and inspect the O-rings for damage.
[a] If the O-rings are damaged, repair as necessary. Refer to section 92.2.1.1.
[b] If no damage is found, go to step 4.
4. Inspect the EGR valve for physical damage (broken butterfly).
[a] If the EGR valve is damaged, replace the EGR valve. Refer to section 92.2.1.1.
[b] If no damage is found, replace the EGR Delta P Sensor. Refer to section 92.2.1.1.
92.2.1.1 Verify Repairs
Verify repairs as follows:
1. Turn ignition OFF.
2. Reconnect any electrical connections that were disconnected to perform the diagnosis.
3. Clear codes with DDDL 7.0 or latest version.
4. Start and bring engine up to operating temperature (over 140°F/60°C).
5. Verify operation is satisfactory and no warning lamps illuminate. If warning lamps
illuminate, troubleshoot the codes. If assistance is required, call the Detroit Diesel
Customer Support Center at 313–592–5800.
