Originally Posted by eddiexxxxxg

not always i work for gm i worked on an hhr with the same problem that was off time. it doesnt always give driving issues .sometimes it can even make the car run better but there will always be the check engine light

it also is completely possible that if you overheated it that you could have possibly did damage to the camshaft im pretty sure there is a bulletin out for it

DTC P0017
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 P0017: Crankshaft Position (CKP) - Exhaust Camshaft Position (CMP) Correlation

Circuit/System Description

The powertrain control module (PCM) uses the crankshaft position (CKP) sensor and the camshaft position (CMP) sensor information to monitor the correlation between the crankshaft and camshaft positions.
Conditions for Running the DTC
• DTCs P0335, P0336, P0340, P0341 are not set.
• The engine is cranking or running.
• DTC P0017 runs continuously 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.
Action Taken When the DTC Sets
• The control module stores the DTC information into memory when the diagnostic runs and fails.
• The malfunction indicator lamp (MIL) will not illuminate.
• The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Failure Records.
• The driver information center, if equipped, may display a message.
Conditions for Clearing the DTC
• 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 non-emission related diagnostic.
• Clear the DTC with a scan tool.
Diagnostic Aids
• Inspect the engine for any recent mechanical repairs. An incorrectly installed camshaft position sensor, crankshaft, camshaft, or timing chain can cause this DTC to set.
• An incorrectly built exhaust camshaft can cause this DTC to set.
Reference Information
Schematic Reference

Engine Controls Schematics
Connector End View Reference

• Engine Controls Connector End Views
• Powertrain Control Module Connector End Views
Electrical Information Reference

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

• Scan Tool Data List
• Scan Tool Data Definitions
Circuit/System Verification

Observe the DTC Information with a scan tool.
⇒ If the scan tool displays that any other DTCs also failed this ignition, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
⇒ If only DTC P0017 is displayed, continue with Circuit/System Testing.
Circuit/System Testing

1. With the ignition OFF, inspect the crankshaft balancer bolt for the proper torque. Refer to Fastener Tightening Specifications .
⇒ If the crankshaft balancer bolt is not at the proper torque, refer to Crankshaft Balancer Replacement .
2. Inspect for incorrect installation of the CMP sensor. Refer to Camshaft Position Sensor Replacement .
3. Inspect the engine for correct valve timing. Refer to Camshaft Timing Chain, Sprocket, and Tensioner Replacement .