Makes 🢒
Holden 🢒
2009 🢒
Captiva 🢒
DTC 🢒
DTC P0601, P0602, P0603, P0604, P0605, P0606, P0607, P1600, P1621, P1627, P1680, P1681, P1683, or P2610
Diagnostic Instructions
DTC Descriptors
DTC P0601: Control Module Read Only Memory (ROM)
DTC P0602: Control Module Not Programmed
DTC P0604: Control Module Random Access Memory (RAM)
DTC P0606: Control Module Internal Performance
Circuit/System Description
This diagnostic applies to internal microprocessor integrity conditions within the engine control module (ECM). This diagnostic also addresses if the ECM is not programmed.
Conditions for Running the DTC
P0601 or P0604
• | The ignition is ON or the engine is running. |
• | The DTCs run once an ignition cycle. |
P0602
• | The ignition is ON or the engine is running. |
• | The DTC runs continuously once the above conditions are met. |
P0606
• | The engine speed is greater than 1,200 RPM. |
• | The ignition voltage is greater than 7 volts. |
• | The DTC runs continuously once the above conditions are met. |
Conditions for Setting the DTC
P0601
The ECM detects the incorrect read only memory (ROM) checksum for greater than 30 seconds.
P0602
The ECM detects that programming is incomplete for greater than 1 second.
P0604
The ECM detects random access memory (RAM) errors for greater than 5 seconds.
P0606
The ECM detects an internal condition for greater than 5 seconds.
Action Taken When the DTC Sets
DTCs P0601, P0602, P0604, and P0606 are Type A DTCs.
Conditions for Clearing the DTC
DTCs P0601, P0602, P0604, and P0606 are Type A DTCs.
Reference Information
Description and Operation
Engine Control Module Description
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Circuit/System Verification
Ignition ON, observe the DTC information with a scan tool. DTCs P0601, P0602, P0604, and P0606 should not set.
⇒ | If DTCs P0601 or P0604 failed this ignition, replace the ECM. |
Circuit/System Testing
P0602
Program the ECM. If DTC P0602 sets after programming, perform the following steps:
• | Ensure that all tool connections are secure. |
• | Ensure the programming equipment is operating correctly. |
• | Ensure the correct software and the correct calibration is used. |
• | Attempt to program the ECM. |
⇒ | If DTC P0602 sets, replace the ECM. |
P0606
- Observe the Freeze Frame/Failure Records with a scan tool.
- Clear the DTCs with a scan tool.
- Ignition OFF for 30 seconds.
- Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
⇒ | If DTC P0606 failed this ignition, replace the ECM. |
Repair Instructions
Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.
Control Module References
for engine control module replacement, setup, and programming