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Diagnostic Trouble Code numbers are read by plugging a code reader or scan tool into the vehicle diagnostic connector (usually located under the instrument panel near the steering column). The presence of a code will turn on the Check Engine Light. The light will remain on until the code has been erased. The code number does not tell you which part has failed. It only indicates a possible fault has been detected in the circuit, system or sensor described. Further testing is usually required to isolate the fault BEFORE repairs are made. For diagnostic charts and vehicle specific repair information, refer to a service manual, or the OEM technical website.
DTC CODES P0600 to P0699
P0600....Serial Communication Link
P0601....Internal Control Module Memory Check Sum Error
P0602....Control Module Programming Error
P0603....Internal Control Module Keep Alive Memory (KAM) Error
P0604....Internal Control Module Random Access Memory (RAM) Error
P0605....Internal Control Module Read Only Memory (ROM) Error
P0606....ECM/PCM Processor (Click Here for help diagnosing PCM problems)
P0607....Control Module Performance
P0608....Control Module VSS Output 'A'
P0609....Control Module VSS Output 'B'
P0610....Control Module Vehicle Options Error
P0615....Starter Relay Circuit (Click Here for help diagnosing starter problems)
P0616....Starter Relay Circuit Low
P0617....Starter Relay Circuit High
P0618....Alternative Fuel Control Module KAM Error
P0619....Alternative Fuel Control Module RAM/ROM Error
P0620....Generator Control Circuit
P0621....Generator Lamp 'L' Terminal Control Circuit
P0622....Generator Field 'F' Terminal Control Circuit
P0623....Generator Lamp Control Circuit
P0624....Fuel Cap Lamp Control Circuit
P0630....VIN Not Programmed or Mismatch - ECM/PCM
P0631....VIN Not Programmed or Mismatch - TCM
P0635....Power Steering Control Circuit ( Click Here for help troubleshooting Power Rack & Pinion Steering)
P0836....Power Steering Control Circuit Low
P0637....Power Steering Control Circuit High
P0638....Throttle Actuator Control Range/Performance (Bank 1)
P0639....Throttle Actuator Control Range/Performance (Bank 2)
P0640....Intake Air Heater Control Circuit
P0645....A/C Clutch Relay Control Circuit ( Click Here for help troubleshooting A/C problems)
P0646....A/C Clutch Relay Control Circuit Low
P0647....A/C Clutch Relay Control Circuit High
P0648....Immobilizer Lamp Control Circuit ( Click Here for help troubleshooting Anti-Theft System problems)
P0649....Speed Control Lamp Control Circuit
P0650....Malfunction Indicator Lamp (ML) Control Circuit
P0654....Engine RPM Output Circuit
P0655....Engine Hot Lamp Output Control Circuit
P0656....Fuel Level Output Circuit ( Click Here for help troubleshooting Fuel Gauge problems)
P0660....Intake Manifold Tuning Valve Control Circuit (Bank 1)
P0661....Intake Manifold Tuning Valve Control Circuit Low (Bank 1)
P0662....Intake Manifold Tuning Valve Control Circuit High (Bank 1)
P0663....Intake Manifold Tuning Valve Control Circuit (Bank 2)
P0664....Intake Manifold Tuning Valve Control Circuit Low (Bank 2)
P0665....Intake Manifold Tuning Valve Control Circuit High (Bank 2)
P0666....PCM/ECM/TCM Internal Temp. Sensor Circuit
P0667....PCM/ECM/TCM Internal Temp. Sensor Range/Perf
P0668....PCM/ECM/TCM Internal Temp. Sensor Circuit Low
P0669....PCM/ECM/TCM Internal Temp. Sensor Circuit High
P0670....Glow Plug/Heater Module Control
P0671....Glow Plug/Heater Cylinder 1
P0672....Glow Plug/Heater Cylinder 2
P0673....Glow Plug/Heater Cylinder 3
P0674....Glow Plug/Heater Cylinder 4
P0675....Glow Plug/Heater Cylinder 5
P0676....Glow Plug/Heater Cylinder 6
P0677....Glow Plug/Heater Cylinder 7
P0678....Glow Plug/Heater Cylinder 8
P0679....Glow Plug/Heater Cylinder 9
P0680....Glow Plug/Heater Cylinder 10
P0681....Glow Plug/Heater Cylinder 11
P0682....Glow Plug/Heater Cylinder 12
P0683....Glow Plug/Heater Module Comm Problem
P0684....Glow Plug/Heater Comm Problem CKT Range/Perf
P0685....ECM/PCM Power Relay Control Circuit/Open
P0686....ECM/PCM Power Relay Control Circuit Low
P0687....ECM/PCM Power Relay Control Circuit High
P0688....ECM/PCM Power Relay Sense Circuit
P0689....ECM/PCM Power Relay Sense Circuit Low
P0690....ECM/PCM Power Relay Sense Circuit High
P0691....Cooling Fan 1 Control Circuit Low (Click Here for Cooling Fan Relay Problems)
P0692....Cooling Fan 1 Control Circuit High
P0693....Cooling Fan 2 Control Circuit Low
P0694....Cooling Fan 2 Control Circuit High
P0695....Cooling Fan 3 Control Circuit Low
P0696....Cooling Fan 3 Control Circuit High
P0697....Sensor C Reference Voltage Circuit/Open
P0698....Sensor C Reference Voltage Circuit Low
P0699....Sensor C Reference Voltage Circuit High
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