Search engine trouble codes.
Example: P0120
P2978 Alfa Romeo 155 engine code seems a kind of powertrain problem, we try to show one by one the meaning and the solution.
Brief explanation of the P2978 Alfa Romeo 155 code and definition of P2978 Alfa Romeo 155 is the bottom side.
| p |
Powertrain Code Problem is related engine, transmission and emissions systems. |
| 2 | MFG - Manufacturer Specific |
| 9 | Fuel And Air Metering (Injector Circuit Malfunctions Only) |
| 7 | Vehicle Speed Output Circuit |
| 8 | PCM Stack Overrun |
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 P2978 Alfa Romeo 155 ?
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. |
The valves of each cylinder are kept closed using a pair of arms that replace the conventional engine's roller-type rocker arm. P2978 code one of these arms follows the cam profile while the second arm connects to the valves. During normal engine operation the two arms are joined by a locking pin. When you see P2978 Alfa Romeo 155 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.
