What Does P1317 Mean?
P1317 indicates that the Injector Driver Module (IDM) has not updated its diagnostic codes or communication data within the expected time window. The PCM expects periodic communication from the IDM, and a failure to receive updated information suggests a communication link or IDM processing issue.
Common Causes
30%
IDM communication bus wiring fault (open/short in data line)
25%
Injector Driver Module internal processor failure
20%
Corroded or damaged IDM connector
15%
IDM power supply interruption (loose connection or blown fuse)
10%
PCM communication port failure
Diagnostic Steps
1
Check the IDM fuse and power supply — verify battery voltage is present at the IDM power input with the key on.
2
Inspect the IDM connector for corrosion, water intrusion, or damaged pins.
3
Verify the communication bus wiring between the PCM and IDM for opens, shorts, or physical damage.
4
Attempt to communicate directly with the IDM using the scan tool — if no communication is possible, the IDM may have failed.
5
Check IDM ground connections for excessive resistance or voltage drop.
Estimated Repair Cost
$150 - $800
Parts + labor, varies by vehicle and location
P1317 indicates that the Injector Driver Module (IDM) has not updated its diagnostic codes or communication data within the expected time window. The PCM expects periodic communication from the IDM, and a failure to receive updated information suggests a communication link or IDM processing issue.
The most common cause of P1317 (Injector Circuit / IDM Codes Not Updated) is: IDM communication bus wiring fault (open/short in data line)
Typical repair costs for P1317 range from $150 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
If the IDM is not communicating, injector control may default to a safe mode with reduced performance. Extended driving in this condition can lead to incomplete combustion and potential engine damage.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1317 to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel Injection / Module Communication
Difficulty
Type
Manufacturer
Recommended Tools
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