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Example: P0120
P3778 Chevrolet Astro engine code seems a kind of powertrain problem, we try to show one by one the meaning and the solution.
Brief explanation of the P3778 Chevrolet Astro code and definition of P3778 Chevrolet Astro is the bottom side.
| p |
Powertrain Code Problem is related engine, transmission and emissions systems. |
| 3 | SAE - Generic |
| 7 | Auxiliary Emission Controls |
| 7 | Vehicle Speed Output Circuit |
| 8 | PCM Stack Overrun |
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 P3778 Chevrolet Astro ?
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. P3778 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 P3778 Chevrolet Astro 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.
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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.
