2010 Cadillac Truck SRX FWD V6-3.0L Page 1005
DTC P0016, P0017, P0018, or P0019
The ECM detects that one camshaft is mis-aligned with the crankshaft. The ECM detects one of the following conditions:
* Bank 1 intake camshaft is greater than 9 degrees retarded or 12 degrees advanced in relationship to the crankshaft.
* Bank 1 exhaust camshaft is greater than 10 degrees retarded or 13 degrees advanced in relationship to the crankshaft.
* Bank 2 intake camshaft is greater than 11 degrees retarded or 13 degrees advanced in relationship to the crankshaft.
* Bank 2 exhaust camshaft is greater than 9 degrees retarded or 13 degrees advanced in relationship to the crankshaft.
DTC P0016 and P0017
The ECM detects that both camshafts on bank 1 are mis-aligned with the crankshaft. The ECM detects the following conditions:
* Bank 1 intake camshaft is greater than 6 degrees retarded or 9 degrees advanced in relationship to the crankshaft.
* Bank 1 exhaust camshaft is greater than 6 degrees retarded or 9 degrees advanced in relationship to the crankshaft.
DTC P0018 and P0019
The ECM detects that both camshafts on bank 2 are mis-aligned with the crankshaft. The ECM detects the following conditions:
* Bank 2 intake camshaft is greater than 6 degrees retarded or 9 degrees advanced in relationship to the crankshaft.
* Bank 2 exhaust camshaft is greater than 7 degrees retarded or 9 degrees advanced in relationship to the crankshaft.
DTC P0016, P0017, P0018, and P0019
The ECM detects that all 4 camshafts are mis-aligned with the crankshaft. The ECM detects the following conditions:
* Bank 1 intake camshaft is greater than 6 degrees retarded or 9 degrees advanced in relationship to the crankshaft.
* Bank 1 exhaust camshaft is greater than 6 degrees retarded or 9 degrees advanced in relationship to the crankshaft.
* Bank 2 intake camshaft is greater than 6 degrees retarded or 8 degrees advanced in relationship to the crankshaft.
* Bank 2 exhaust camshaft is greater than 7 degrees retarded or 9 degrees advanced in relationship to the crankshaft.
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 secondary timing chain can 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.
* DTCs P0016, P0017, P0018, and P0019 set at the same time 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).
* 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
Schematic Reference
Engine Controls Schematics (LAU) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)Engine Controls Schematics
(LF1) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)
Description and Operation
Camshaft Actuator System Description (See: Powertrain Management/Computers and Control Systems/Description and Operation/Camshaft
Actuator System)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
