2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 971
DTC P0017
- Crankshaft Position - Exhaust Camshaft Position Not Plausible Bank 1
DTC P0018
- Crankshaft Position - Intake Camshaft Position Not Plausible Bank 2
DTC P0019
- Crankshaft Position - Exhaust Camshaft Position Not Plausible Bank 2
Circuit/System Description
The engine control module (ECM) uses the crankshaft position (CKP) sensor and the camshaft position (CMP) sensor pulses to monitor the
correlation between the crankshaft and the camshaft position. An improper relative position can be caused by either engine timing or improper
indexing of the camshaft drive chain.
Conditions for Running the DTC
* DTC P0335, P0336, P0338, P0340, P0341, P0345, P0346, P0365, P0366, P0390, P0391, P0641, and P0651 are not set.
* The engine is operating.
* The crankshaft and camshaft position signals are synchronized.
* The camshaft position actuator is in the parked position.
* DTC P0016, P0017, P0018, and P0019 run continuously once the above conditions are met.
Conditions for Setting the DTC
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
