Search engine trouble codes.
Example: P0120
P0421 Scion Xd engine code seems a kind of powertrain problem, we try to show one by one the meaning and the solution.
Brief explanation of the P0421 Scion Xd code and definition of P0421 Scion Xd is the bottom side.
| p |
Powertrain Code Problem is related engine, transmission and emissions systems. |
| 0 | SAE - Generic |
| 4 | Transmission |
| 2 | Air Conditioning (A/C) Clutch Feedback Circuit High Voltage |
| 1 | TFP Valve Position Switch-Drive Without Drive Ratio |
SAE - Generic codes, which have a '0' as their second digit to indicate they are common to all makes and models of vehicles. These are the codes that are required for basic emissions fault diagnosis.
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How To Fix P0421 Scion Xd ?
The catalytic converter has an oxygen sensor in front and behind it. When the vehicle is warm and running in closed loop mode, the upstream oxygen sensor waveform reading should fluctuate. |
There are currently two main types of cylinder deactivation used today, depending on the type of engine. P0421 code for the pushrod design which uses solenoids to alter the oil pressure delivered to the lifters. In their collapsed state, the lifters are unable to elevate their companion pushrods under the valve rocker arms, resulting in valves that cannot be actuated and remain closed. When you see P0421 Scion Xd 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.
