P0022 is the OBD-II generic code which indicates that the Engine Control Module (ECM) has determined the intake camshaft timing for bank 2 is more retarded than what the ECM has commanded it be.
This over-retarded timing condition could be during the advancing or retarding phase of the camshaft timing.
What Does Code P0022 Mean?
Diagnostic trouble code (DTC) P0022 OBD-II code stands for “Intake “A” Camshaft Position – Timing Over-Retarded (Bank 2).”
The powertrain control module (PCM) uses a signal from the camshaft position sensor to determine the the proper time to fire the fuel injectors and ignite the spark plugs. The PCM compares this signal to the signal from the crankshaft to determine if the engine is timed properly.
Newer vehicles use a variable timing system to adjust when intake and exhaust valves open and close to increase fuel efficiency and performance. If the Camshaft is not in the proper position relative to the crankshaft, the PCM will set code P0022.
Potential Causes of a P0022 Code
- Failed camshaft variable timing solenoid
- Lower engine oil level
- Incorrect engine timing
- Low oil pressure
- Failed variable valve timing actuator
- Worn timing chain
- Failed timing chain tensioner or guide
P0022 Code Symptoms
- Decreased engine performance (e.g., hard starting, poor idling, stalling)
- Rattling noise from the engine
- Reduced fuel mileage
- Check Engine Light is illuminated
How to Fix P0022
- Try to reset the fault codes and perform a road test
- You can use proper oil viscosity for the engine and the replace the oil and filter
- The other step is to replace to repair the wiring or connection to the camshaft oil control valve
- The camshaft oil control valve for the bank 2 intake camshaft should be replaced
- Then you must carefully check the timing chain alignment and cam phasers for damage
- Diagnosis Of Engine Error OBD Code P0022
Diagnosis Of Engine Error OBD Code P0022
The easy diagnosis step generally follows as per below.
- If you want to monitor the crankshaft and camshaft positions, then you do that easily with electromagnetic sensors. Relief holes in camshaft and crankshaft drive gears are utilized by these sensors to provide signal interruption of the electromagnetic field. The interruptions in the electromagnetic field as square waveform patterns are seen by the PCM which represent varying degrees of voltage.
- Electromagnetic resistance is used to create these variations in voltage in the 5-volt circuit
- There are some manufacturers who use multiple crankshaft sensors to feed separate data streams to the power control module. Input for engine ignition and fuel injection timing is provided from these data streams.
- Engines that have multiple camshafts use a camshaft sensor for each camshaft. Other automakers use notches cut into shafts or nodules that are permanently attached to interrupt the electromagnetic field
- Commonly, the notches or nodules are situated near the rear or middle of the shaft, which depends upon sensor placement.
- The crankshaft sensor on top of the transmission bell-housing can be placed and crankshaft position from interrupter holes in the flex plate should be read. Do a proper diagnosis to make sure that all engine timing indicators are properly aligned.
- Make sure that timing marks are aligned, test belt or chain deflection by using manufacturer’s specifications.
- Test the VVT (Variable Valve Timing) or VCT solenoids and circuitry if timing components prove to be properly aligned.
- Electrical wiring and connectors are more prone to fail than sensors, especially where oil or other corrosive fluids are present.
- You can diagnose this code using several tools. To perform a successful diagnosis, you can use an OBD-II scanner, a digital volt/ohmmeter and an oscilloscope.
How Much Does It Cost to Fix a P0022 Code?
To fix a P0022 code, which typically indicates a faulty camshaft position sensor or issues with the variable valve timing system, the cost can range from $100 to $500 depending on your vehicle, including parts and labor, with the main cost often being the replacement of the camshaft position sensor itself.