P0600

Serial Communication Link Malfunction

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
(Module Identification Defined by SAE J1979)

P0606

ECM/PCM Processor Fault

P0608

Control Module VSS Output “A” Malfunction

P0609

Control Module VSS Output “B” Malfunction

P0610

Control Module VSS Output “B” Malfunction

P0615

Starter Relay Circuit

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 Malfunction

P0621

Generator Lamp “L” Control Circuit Malfunction

P0622

Generator Field “F” Control Circuit Malfunction

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

P0636

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

P0646

A/C Clutch Relay Control Circuit Low

P0647

A/C Clutch Relay Control Circuit High

P0648

Immobilizer Lamp Control Circuit

P0649

Speed Control Lamp Control Circuit

P0650

Malfunction Indicator Lamp (MIL) Control Circuit Malfunction

P0654

Engine RPM Output Circuit Malfunction

P0655

Engine Hot Lamp Output Control Circuit Malfunction

P0656

Fuel Level Output Circuit Malfunction

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)

Mass Air Flow (MAF) Sensor

Description:

How does a P0100 code trigger the check engine light? This code will trigger the check engine light under the following conditions:

1. The computer receives an excessively high voltage from the MAF Sensor with the engine not running.
2. The computer receives an excessively low voltage from the MAF Sensor with the engine running.
3. The computer receives a high voltage reading from the MAF Sensor under light-load driving conditions.

Possible Causes:

MAF Sensor circuit open or shorted
Intake air leaks (unmetered air after MAF Sensor)
Defective MAF Sensor
Electronic Control Module (ECM)/Powertrian Control Module (PCM) concern

Diagnostic Help:

Monitor MAF Sensor voltage reading while increasing engine RPM. The MAF Sensor value should increase in proportion to engine speed. If not, first check for air leaks at intake tube, manifold and all vacuum lines. Then test the MAF Sensor circuits for opens and shorts. See our article Automotive Circuit Testing 101, if you need more assistance with this. If concern is determined to be intermittent, wiggle test connectors and wiring to attempt to duplicate concern. You may also use the “Get Help” link if you need specifications or have any other related questions. Remember to refer to an appropriate manual for specific instruction.

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
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
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
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
P0646 A/C Clutch Relay Control Circuit Low
P0647 A/C Clutch Relay Control Circuit High
P0648 Immobilizer Lamp Control Circuit (“Immobilizer” pending SAE J1930 approval)
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

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)

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