(Internal Control Module) Coolant Temperature Performance
(Internal Control Module) A / D Processing Performance
(Internal Control Module) Main Processor Performance
Control Module Performance
This code basically means that the programming of the PCM/ECM (powertrain/engine control module) has failed. This can be a more serious code and may also be refered to as “ECM Internal Circuit Malfunction”.
Control Module Performance
– Faulty Engine Control Module (ECM)
– Engine Control Module (ECM) Harness power supply circuit is open or shorted
– Engine Control Module (ECM) Programming
– Engine may not start
Control Module VSS Output A
Vehicle Speed Output Circuit
– Faulty Vehicle Speed Sensor
– Vehicle Speed Sensor harness is open or shorted
– Vehicle Speed Sensor circuit poor electrical connection
Control Module VSS Output B
Control Module VSS Output B Malfunction
(Internal Control Module) Monitoring Processor Performance
(Internal Control Module) Keep Alive Memory (KAM) Error
Internal Control Module Keep Alive Memory Error
– Loose or poor battery terminal connection
– Low battery charge
– ECM power supply circuit is open or shorted
– ECM Programing
– Faulty ECM
– Engine may not start
(Internal Control Module) Random Access Memory (RAM) Error
Internal Control Module Random Access Memory Error
– Loose or poor battery terminal connection
– Low battery charge
– ECM power supply circuit is open or shorted
– ECM Programing
– Faulty ECM
– Engine may not start
(Internal Control Module) Read-Only Memory (ROM) Error
This trouble code basically means that the PCM/ECM (powertrain/engine control module) has detected an internal control module fault in the ROM (read only memory) in the PCM. The PCM is basically the vehicle’s “electronic brain” that controls functions such as fuel injection, ignition, etc. When self-checks fail in the ROM, this DTC is set.
Symptoms of a P0605 DTC will include MIL (malfunction indicator lamp) illumination, although there may be other symptoms including but not limited to various warning lights on dash, stalling, and no start conditions.
Control Module Fault
– Engine Control Module (ECM) may be faulty
– ECM harness power supply circuit is open or shorted
– ECM harness ground circuit is open or shorted
– Engine may not start
Engine Control Module (ECM) / Powertrain Control Module (PCM) Processor
ECM/PCM Processor Fault
– Engine Control Module (ECM) Harness power supply circuit is open or shorted
– Engine Control Module (ECM) Programming
– Faulty Engine Control Module (ECM)
– Engine may not start
(Internal Control Module) Memory Check Sum Error
Basically that means that there is an interal fault in the Powertrain Control Module (PCM). There have been many reported PCM failures on Chrysler/Dodge products although it is possible for this to happen on any vehicle.
Have not symptoms will be discernible to the driver, other than the illuminated Check Engine Light. Typically the engine runs fine, gauges work, etc.
Control Module Read Only Memory
The P0601 OBDII code, the most common fix is to replace and reprogram the PCM. In a few cases the dealer may be able to reflash the PCM and get it working. But more than likely the PCM will need to be replaced and reprogrammed (we recommend you take it to a dealership for this). The good news is it *may* be covered under your emmissions warranty. So even if you’re out of bumper-to-bumper warranty or powertrain warranty, check your warranty guide or dealer to see if this is covered.
– Faulty Engine control Module (ECM)
– Engine control Module(ECM) harness is open or shorted
– Engine control Module (ECM) cicuit poor electricl connection
– Low battery voltage
Control Module Programming Error
Control Module Programming Error
– Engine Control Module (ECM) not programed
– ECM program
– Faulty ECM
– Wrong ECM
Serial Communication Link
Loss of Serial Communication Link
– Faulty Engine control Module (ECM)
– Engine control Module(ECM) harness is open or shorted
– Engine control Module (ECM) cicuit poor electricl connection
– Low battery voltage
Stop-Start Status Signal Circuit High
Brake Pressure Sensor / Brake Pedal Position Sensor Correlation
Exhaust Aftertreatment Power Relay Control Circuit Stuck Off
Reductant Heater Control Module Performance
Stop-Start Status Signal Circuit
Stop-Start Status Signal Circuit Low