What Does P1627 Mean?
The powertrain control module is not receiving expected communication messages from the fuel injection pump control module via the vehicle's data bus. This indicates a CAN bus or module communication failure specific to diesel fuel injection systems.
Safety Warning
Engine will likely not start or run properly, potentially causing stalling in traffic. Do not drive if engine is stalling intermittently.
Common Causes
35%
Fuel injection pump control module failure or internal fault
30%
CAN bus wiring fault between PCM and injection pump module
20%
Poor ground connection at injection pump module
15%
PCM communication circuit failure
Diagnostic Steps
1
Step 1: Verify injection pump control module is responding using scan tool module identification
2
Step 2: Check CAN bus voltage levels between PCM and injection pump module (should be 2.5V nominal)
3
Step 3: Inspect connectors at fuel injection pump module for corrosion or bent pins
4
Step 4: Test continuity and resistance of CAN High and CAN Low circuits between modules
5
Step 5: Monitor live data from injection pump module while cranking to verify signal presence
Estimated Repair Cost
$200 - $2,500
Parts + labor, varies by vehicle and location
The powertrain control module is not receiving expected communication messages from the fuel injection pump control module via the vehicle's data bus. This indicates a CAN bus or module communication failure specific to diesel fuel injection systems.
The most common cause of P1627 (Data-Bus Powertrain missing message from fuel injection pump) is: Fuel injection pump control module failure or internal fault
Typical repair costs for P1627 range from $200 to $2,500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Engine will likely not start or run properly, potentially causing stalling in traffic. Do not drive if engine is stalling intermittently.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1627 to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel Injection System
Difficulty
Type
Manufacturer
Recommended Tools
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