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P21b0 engine code seems a kind of powertrain problem, we try to show one by one the meaning and the solution.
Brief explanation of the P21b0 code and definition of P21b0 is the bottom side.
Problem is related engine, transmission and emissions systems.
|2||MFG - Manufacturer Specific|
|b||BBV Sensor Circuit Low Voltage|
|0||Transmission Engaged At High Throttle Angle|
MFG - Manufacturer Specific codes, which have a '1' as their second digit to indicate they are unique to a particular vehicle make or model. These special codes were deemed necessary by the vehicle manufacturers so they could provide additional diagnostic information beyond the basic list of generic OBD II codes for all kinds of faults, not just emissions-related faults.
How To Fix P21b0 ?
Deactivation of cylinders is achieved by releasing a synchroniser pin that normally interlocks the cam follower and rocker arms. P21b0 code resolves the synchroniser pin is released using hydraulic pressure which is controlled by a dedicated solenoid.
Regarding the P21b0 code, it would probably be worthwhile to carefully inspect the wire harness near the intake manifold bracket. This is done most easily from below the car in the area near the oil filter. When you see P21b0 engine fault code on your engine code reader this description will help you.
|P Codes||List of all Powertrain codes.|
Final Step: In the definitions listed below, there is a test drive recommended after you've completed any repairs to see if the condition is fixed. Before you take a test drive after a repair, always erase the P Code(s) first. This will turn the check engine light off and then you will know if the check engine light returns, you've got further diagnostics to complete.
BE CAREFUL !
This engine code information is presented for information purposes only. This is not intended as repair advice and we are not responsible for any actions you take on any vehicle.