GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Uplander Ext. 🢒 Engine 🢒 Engine Controls - 3.5L (LX9) 🢒 DTC P0016

Circuit Description

The powertrain control module (PCM) uses the crankshaft position (CKP) sensor and the camshaft position (CMP) sensor signals to monitor the correlation between the crankshaft and camshaft positions. If the PCM detects that the timing between the crankshaft and the camshaft is incorrect, DTC P0016 sets.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC P0016 Crankshaft Position (CKP) - Camshaft Position (CMP) Correlation

Conditions for Running the DTC
    • DTCs P0335, P0336, P0340, P0341 are not set.
    • The engine speed is less than 1,500 RPM.
    • The diagnostic runs 24 times per engine revolution when the above conditions are met.

Conditions for Setting the DTC

The PCM detects that the timing between the crankshaft and the camshaft is incorrect for less than 1 second.

Action Taken When the DTC Sets
    • The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
    • The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.

Conditions for Clearing the MIL/DTC
    • The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
    • A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
    • A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
    • Clear the MIL and the DTC with a scan tool.

Diagnostic Aids
    • Inspect the engine for any recent engine mechanical repairs. An incorrectly installed camshaft, crankshaft, or timing chain can cause this DTC to set.
    • For an intermittent condition, refer to Intermittent Conditions .

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. This step determines if a condition is present.

    2.

  2. This step inspects for any recent engine mechanical repairs. An incorrectly installed camshaft, crankshaft, or timing chain can cause this DTC to set.

Step

Action

Yes

No

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2

  1. Start the engine.
  2. Allow the engine to reach the normal operating temperature.
  3. Observe the DTC information with a scan tool.

Does the scan tool display DTC P0016 failed this ignition?

Go to Step 4

Go to Step 3

3
  1. Observe the Freeze Frame/Failure Records for this DTC .
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
  4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records.

Did the DTC fail this ignition?

Go to Step 4

Go to Diagnostic Aids

4

Observe the DTC Information with a scan tool.

Does the scan tool display that DTC P0335, P0336, P0340, or P0341 also failed this ignition?

Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information

Go to Step 5

5

Repair one of the following conditions:

    • A timing chain tensioner condition
    • An incorrectly installed timing chain
    • Excessive play in the timing chain
    • A timing chain that jumped teeth

Did you complete the repair?

Go to Step 6

--

6
  1. Clear the DTCs with a scan tool.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
  4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records.

Did the DTC fail this ignition?

Go to Step 2

Go to Step 7

7

Observe the Capture Info with a scan tool.

Are there any DTCs that have not been diagnosed?

Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information

System OK