Capsule
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- Nov 15, 2014
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- Location
- Brisbane, QLD
- Members Ride
- MY09 VE Omega
2010 sv6 sidi engine light came on months ago then went off and on randomly for about 3 weeks, for about a month it's been on all the time, when the weather is hot the car runs sluggish from take off, when it's cooler weather the car runs fine, last week when coming to a stop the engine light started blinking and car was shaking with ruff idle that lasted a minute or so before idle returning to normal with engine light not flashing just on, plugged a scanner in gave p0008 code suggesting timing chain stretch, car has been running fine no noises from chains, if out side temp gets above 30deg it's sluggish, any ideas??
From the Service/Repair manual:
DTC Descriptor
DTC P0008: Engine Position System Performance Bank 1 DTC P0009: Engine Position System Performance Bank 2
Circuit/System Description
The engine control module (ECM) tests for a misalignment between both camshafts on one bank of the engine and the crankshaft. The misalignment would be at an idler sprocket for either bank or at the crankshaft. Once the ECM learns the position of both camshafts on one bank of the engine, the ECM compares the learned values to a reference value. The ECM will set a DTC if both learned values for one bank of the engine are exceeding a calibrated threshold in the same direction.
Conditions for Running the DTC
• DTCs P0010, P0011, P0013, P0014, P0020, P0021, P0023, P0024, P0341, P0342, P0343, P0346, P0347, P0348, P0366, P0367, P0368, P0391, P0392, P0393, P2088, P2089, P2090, P2091, P2092, P2093, P2094 and P2095 are not set.
• The engine is operating.
• The ECM has learned the camshaft positions.
• DTC P0008 and P0009 runs continuously once the above conditions are met.
Conditions for Setting the DTC
The ECM detects that both camshafts on either bank of the engine are mis-aligned with the crankshaft for greater than 4 seconds.
Action Taken When the DTC Sets
DTC P0008 and P0009 are type B DTCs.
Conditions for Clearing the DTC
DTC P0008 and P0009 are type B DTCs.
Diagnostic Aids
• Inspect the engine for any recent engine mechanical repairs. An incorrectly installed secondary timing chain can cause this DTC to set.
• A single failed camshaft actuator or actuator solenoid will not cause this DTC to set. This diagnostic algorithm is designed to detect an alignment condition between a primary intermediate sprocket and the secondary timing chain or the alignment between a primary intermediate sprocket and the crankshaft. Either condition would cause the camshaft timing for both cams on one bank to be off an equal number of degrees.
• The presence of DTCs P0008 and P0009 along with 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 centre (TDC).
• Observing the desired and actual camshaft angle parameters with a scan tool before a DTC sets, 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
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information Circuit/System Verification
1. Clear the DTCs with a scan tool.
2. Allow the engine to reach the normal operating temperature.
3. Idle the engine for 10 minutes or until a DTC sets. Observe the DTC information with a scan
tool, DTCs P0008 and P0009 should not set.
4. 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.
Circuit/System Testing
1. Inspect the timing chains and tensioners for excessive wear or misalignment.
⇒ If you find a condition with the timing chains or tensioners, repair as necessary.
2. Inspect the crankshaft reluctor wheel for being mis-positioned on the crankshaft. ⇒ If you find a condition with the crankshaft, repair as necessary.