High severity
P0021Premature Ignition Advance / Crankshaft Phase Shift (Bank 2)
Part
Variable Crankshaft Phase Wheel
Part price
$150
At a workshop
$275
You save
$125
How to read code P0021
P
System
Powertrain (engine and transmission)
0
Code type
Generic code (SAE / OBD-II)
0
Subsystem
General system / auxiliary measurement
21
Fault number
Specific fault within the subsystem
Symptoms
- Engine RPM fluctuation
- Weak engine at low RPM
- Difficulty starting a warm engine
Possible causes
- Electrovalve phase timing issue or wear
- Crankshaft timing chain stretch
- Oil passage contamination in the cylinder head
Diagnostic steps
- 1Check engine oil pressure with a gauge
- 2Inspect the electrovalve for clogs
- 3Assess the mechanical condition of the crankshaft timing and phase locking
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Frequently asked questions about P0021
What does code P0021 mean?
P0021: Premature Ignition Advance / Crankshaft Phase Shift (Bank 2).
What are the symptoms of code P0021?
Engine RPM fluctuation; Weak engine at low RPM; Difficulty starting a warm engine.
What causes code P0021?
Electrovalve phase timing issue or wear; Crankshaft timing chain stretch; Oil passage contamination in the cylinder head.
Can I drive with code P0021?
LIMP MODE – You may drive carefully to the nearest workshop only.
How much does it cost to fix code P0021?
The part (Variable Crankshaft Phase Wheel) costs about $150, and a mechanic’s labour about $125.
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