P0022

Intake Camshaft Position Timing - Over-Retarded (Bank 2)

Powertrain Emission Controls Variable Valve Timing 🟡 Moderate — Fix within a week ⚠️ Drive with Care
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What This Actually Means

In plain language — no jargon

The intake camshaft on Bank 2 is rotating too late compared to what the engine computer expects, like a musician playing their notes slightly behind the beat. This throws off the precise timing of when air and fuel enter the cylinder, reducing engine efficiency.

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Symptoms You May Notice

3 known symptoms for this code
Check Engine Light illuminated
Rough idle or hesitation during acceleration
Reduced fuel economy and engine performance
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How Your ECU Detects This

Technical sensor logic and voltage thresholds

The ECM compares camshaft position sensor signals against crankshaft position to determine actual cam timing. When the intake cam lags behind the expected advance window for more than a calibrated duration threshold, it triggers this code. The ECU cannot electronically correct the delay beyond its VVT (Variable Valve Timing) adjustment range.

Voltage & Parameter Thresholds

ParameterNormal RangeFault Condition
Cam Timing Advance (Bank 2 Intake) Within ±5° of target during closed-loop VVT control Retarded >10° from target for >2 seconds during steady operation
Camshaft Position Sensor Signal Correlation Cam and crank signals synchronized within tolerance Persistent lag indicating mechanical or solenoid malfunction
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Diagnostic & DIY Fix Guide

Check these in order — from cheapest to most complex
1
Engine oil and filter
Change to manufacturer-spec viscosity; degraded oil restricts VVT solenoid operation.
2
VVT solenoid (Bank 2 intake)
Replace the solenoid valve controlling camshaft timing oil pressure on the affected bank.
3
Intake camshaft and timing chain
Inspect for wear or skipped teeth; replace if chain has stretched beyond tolerance.
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When to See a Professional Mechanic

Not all fault codes are safe to DIY

Code P0022 is a moderate fault. You can generally drive to a workshop, but avoid long trips or high-load driving (motorway, uphill towing) until it is diagnosed. If the code keeps returning after clearing, or if you notice the symptoms listed above worsening, do not delay professional diagnosis. Many moderate codes have multiple possible root causes — a mechanic with live OBD data can identify the exact fault more efficiently than part-by-part trial and error.

Safety note: OBD-II codes identify the system or circuit where a fault was detected — they do not always identify the exact failed component. A professional mechanic using live sensor data will diagnose the root cause more accurately than replacing parts based on the code alone.
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How to Clear Code P0022

What happens after you fix the fault

Once the fault is repaired, P0022 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.

The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.

✅ Safe to Clear When
  • Fault has been diagnosed and repaired
  • You want to confirm the repair worked
  • Code appeared after a sensor was cleaned
⚠️ Do Not Clear When
  • Preparing for an emissions/PUC test
  • Root cause is still undiagnosed
  • Check engine light is flashing
Emissions test note: Clearing codes resets OBD readiness monitors. Most vehicles need 50–100 km of mixed driving before monitors complete. Do not clear codes immediately before an emissions or PUC inspection.