General Precautions of EFI System Maintenance
F-10
8. P0017 Improper Relative Position of Crankshaft and Air Exhaust Camshaft
Malfunction Diagnostic Guide:
Required Equipment: (Diagnostic Instrument with EOBD Diagnostic Function, Digital Multimeter, and
Correct Circuit Diagram)
Description about Malfunction Cause: Large deviation of relative mounting position between crankshaft
and camshaft or skidding in belt.
Step I: Use diagnostic instrument to read the malfunction information
Read Result I Read Result II
MIL Lamp On P-CODE Present MIL Lamp Off P-CODE Present
Lighting P0017 Lighting P0017
Maintenance tips:
1). Large deviation between relative actual and
target mounting position of crankshaft and
camshaft;
2). Skidding of belt of camshaft and crankshaft;
3). VVT is jammed at certain position and cannot
return to the block position;
4). Low control precision of OCV valve.
Check the relative position between camshaft
and crankshaft.
Maintenance tips:
1. Replace air exhaust VVT;
2. Replace camshaft.
9. P0030 Upstream Oxygen Sensor Heating Control Circuit Open
Description about Malfunction Cause:
After engine has been started, the voltage of upstream oxygen sensor heating circuit is to be measured by the
circuit control module inside ECU, and when the voltage complies with the voltage in the mode of open
circuit, it is determined to be the heating circuit of upstream oxygen sensor in open circuit.
Schematic Circuit:
Main relay
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