GM Service Manual Online
For 1990-2009 cars only

Diagnostic Instructions

    • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    • Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    •  Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

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

Diagnostic Fault Information

CMP Sensor

Circuit

Short to Ground

Open

Short to Voltage

CMP Sensor 5-Volt Reference Circuit

P0192, P02E8, P0462, P0409, P0642, P2453, P2454, P2564

P0340

--

CMP Sensor Signal Circuit

P0340

P0340

P0340

CMP Sensor Ground Circuit

--

P0340

--

CKP Sensor

Circuit

Short to Ground

Open

Short to Voltage

CKP Sensor 5-Volt Reference Circuit

P0192, P02E8, P0462, P0409, P0642, P2453, P2454, P2564

P0335

--

CKP Sensor Signal Circuit

P0355

P0335

P0335

CKP Sensor Ground Circuit

--

P0335

--

Typical Scan Tool Data

Crank Signal Present

Circuit

Short to Ground

Open

Short to Voltage

Operating Conditions: Engine running

Parameter Normal Range: Yes

CKP Sensor 5-Volt Reference Circuit

No

No

--

CKP Sensor Signal Circuit

No

No

No

CKP Sensor Ground Circuit

--

No

--

Cam Signal Present

Circuit

Short to Ground

Open

Short to Voltage

Operating Conditions: Engine running

Parameter Normal Range: Yes

CMP Sensor 5-Volt Reference Circuit

No

No

--

CMP Sensor Signal Circuit

No

No

No

CMP Sensor Ground Circuit

--

No

--

Circuit/System Description

The engine control module (ECM) monitors the crankshaft position (CKP) and the camshaft position (CMP) signals to determine if they are synchronized. If both signals are not observed by the ECM within a narrow time window, the ECM will determine that an error has occurred.

Conditions for Running the DTC

    • DTCs P0116, P0117, P0118, P0126, P0335, P0336, P0340, P0341, P0642, P0643, P0652, and P0653 are not set.
    • The ignition is ON for longer than 2 seconds.
    • The battery voltage is between 10-16 volts.
    • The crank pulse is active.
    • The CAM pulse is active.
    • The engine speed is more than 350 RPM.
    • The engine coolant temperature is more than -30°C (-22°F).

Conditions for Setting the DTC

The ECM detects that the CKP sensor signals and CMP sensor signals are out of synchronization during 5 engine rotations.

Action Taken When the DTC Sets

DTC P0016 is a Type B DTC.

Conditions for Clearing the DTC

DTC P0016 is a Type B DTC.

Diagnostic Aids

Inspect for any recent engine mechanical repairs. An incorrectly installed camshaft or crankshaft will cause this DTC to set.

If DTC P0016 sets, the fuel injectors will be commanded OFF and the engine will not start.

Reference Information

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

    • If DTC P0116, P0117, P0118, P0126, P0335, P0336, P0340, P0341, P0642, P0643, P0652, and P0653 are set, test and repair those DTCs first.
    • Verify the integrity of the engine exhaust system by inspecting for the following conditions:
       - Damaged components
       - Loose or improper installation

Circuit/System Testing

Important: You must perform the Circuit/System Verification before proceeding with Circuit/System Testing.

  1. If the CKP or CMP sensor is loose and cannot be tightened, replace the sensor.
  2. Remove the CKP or CMP sensor and replace if the sensor casing is broken, or rattles when shaken.
  3. Remove the front engine cover and inspect for excessive camshaft endplay, timing gear misalignment, camshaft reluctor or crankshaft reluctor damage, or front engine cover damage.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Camshaft Position Sensor Replacement
    •  Camshaft Replacement
    •  Crankshaft Position Sensor Replacement
    •  Engine Flywheel Housing Removal
    •  Valve Rocker Arm Cover Replacement
    •  Control Module References for ECM replacement, setup, and programming