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Example: P0120
B1821 Citroen C4 Aircross engine code seems a kind of body problem, we try to show one by one the meaning and the solution.
Brief explanation of the B1821 Citroen C4 Aircross code and definition of B1821 Citroen C4 Aircross is the bottom side.
| b |
Body Code Problem is antilock brake system, electronic suspension and steering systems. |
| 1 | MFG - Manufacturer Specific |
| 8 | Ignition System Or Misfire |
| 2 | Air Conditioning (A/C) Clutch Feedback Circuit High Voltage |
| 1 | TFP Valve Position Switch-Drive Without Drive Ratio |
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.
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How To Fix B1821 Citroen C4 Aircross ?
The poor running symptoms are consistent with a MAP sensor malfunction. In addition, in some cases, a bad MAP sensor will not throw a code. Again, the ELD code likely represents a separate wiring issue. |
Deactivation of cylinders is achieved by releasing a synchroniser pin that normally interlocks the cam follower and rocker arms. B1821 code resolves the synchroniser pin is released using hydraulic pressure which is controlled by a dedicated solenoid. When you see B1821 Citroen C4 Aircross engine fault code on your engine code reader this description will help you.
| B Codes | List of all Body 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 B 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.
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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.
