Diagnostic Instructions
DTC Descriptors
DTC P0016: Crankshaft Position (CKP) - Intake Camshaft Position (CMP) Correlation Bank 1
DTC P0017: Crankshaft Position (CKP) - Exhaust Camshaft Position (CMP) Correlation Bank 1
DTC P0018: Crankshaft Position (CKP) - Intake Camshaft Position (CMP) Correlation Bank 2
DTC P0019: Crankshaft Position (CKP) - Exhaust Camshaft Position (CMP) Correlation Bank 2
Circuit/System Description
The camshaft position (CMP) actuator system enables the engine control module (ECM) to change the timing of the camshafts while the engine is operating. The CMP actuator solenoid signal from the ECM is pulse width modulated (PWM). The ECM controls the
CMP actuator solenoid duty cycle by controlling the amount of solenoid ON time. The CMP actuator solenoid controls the advance or the retard of each camshaft. The CMP actuator solenoid controls the oil flow that applies the pressure to advance or retard the
camshafts.
Ignition voltage is supplied directly to the CMP actuator solenoid. The ECM controls the solenoid by grounding the control circuit with a solid state device called a driver. The ECM compares the camshaft position or the camshaft angle, to the position
of the crankshaft.
Conditions for Running the DTC
| • | Before the ECM can report DTC P0016, P0017, P0018, or P0019 failed, DTCs P0010, P0011, P0013, P0014, P0020, P0021, P0023, P0024, P0335, P0336, P0338, P0341, P0342, P0343, P0346, P0347, P0348, P0366, P0367, P0368, P0391, P0392, P0393,
P2088, P2089, P2090, P2091, P2092, P2093, P2094, and P2095 must run and pass. |
| • | The engine is operating for greater than 50 seconds. |
| • | The engine coolant temperature is between 0-95°C (32-203°F). |
| • | The calculated engine oil temperature is colder than 120°C (248°F). |
| • | The engine must accelerate such that the CMP actuator system is commanded from the park position to the phased position. This is considered a cam control cycle. There must be a minimum of 2 cam control cycles for at least 2.5 seconds each,
in the phased position. |
| • | DTC P0016, P0017, P0018, and P0019 run continuously when the above conditions are met for approximately 600 seconds. |
Conditions for Setting the DTC
| • | The ECM detects one of the following conditions: |
| - | The ECM detects a deviation in the relationship between a camshaft and the crankshaft. |
| - | A camshaft is greater than 10 degrees advanced in relationship to the crankshaft. |
| - | A camshaft is more 10 degrees retarded in relationship to the crankshaft. |
| • | The ECM detects the difference between an actual intake camshaft angle and the locked position angle is greater than 15 degrees. |
| • | The ECM detects the difference between an actual exhaust camshaft angle and the locked position angle is greater than 21 degrees. |
| • | The condition exists for greater than 4 seconds or a cumulative of 30 seconds. |
Action Taken When the DTC Sets
DTCs P0016, P0017, P0018, and P0019 are Type B DTCs.
Conditions for Clearing the DTC
DTCs P0016, P0017, P0018, and P0019 are Type B DTCs.
Diagnostic Aids
| • | Inspect the engine for any recent engine mechanical repairs. An incorrectly installed camshaft, camshaft actuator, camshaft sensor, crankshaft sensor, or timing chain can cause this DTC to set. |
| • | An actuator that is in the full advance or retard position can cause this DTC to set. |
| • | The presence of DTCs P0008 and P0009 along with DTCs P0016, P0017, P0018, and P0019 indicates a possible condition with the primary timing chain and the alignment between both intermediate sprockets and the crankshaft. Or, the crankshaft
reluctor wheel has moved and is no longer referenced to top dead center (TDC). |
| • | Observe the scan tool CMP Desired, Actual, and Angle Variance parameters before a DTC sets. This may help to isolate whether a condition is specific to one camshaft, one bank, or caused by a condition with the primary crankshaft timing. |
Reference Information
Schematic Reference
Engine Controls Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Camshaft Actuator System Description
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Testing
- Ignition ON, observe the DTC information with a scan tool. Verify DTC P0010, P0013, P0020, P0023, P0335, P0336, P0338, P0341, P0342, P0343, P0346, P0347, P0348, P0366, P0367, P0368, P0391, P0392, P0393, P2088, P2089, P2090, P2091, P2092, P2093,
P2094, or P2095 is not set.
- Idle the engine at normal operating temperature for 10 minutes. DTC P0016, P0017, P0018, or P0019 should not set.
| ⇒ | If a DTC sets, inspect for the following: |
| • | The correct installation of the camshaft sensors |
| • | The correct installation of the crankshaft sensor |
| • | A timing chain tensioner condition |
| • | An incorrectly installed timing chain |
| • | Excessive play in the timing chain |
| • | A timing chain that jumped teeth |
| • | A crankshaft reluctor wheel that has moved in relationship to top dead center (TDC) on the crankshaft |
- 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.
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic procedure.
