C3971 Zender 30-7 Engine Fault Code

Check Solution For C3971 Zender 30-7 OBD Code :

C3971 Zender 30-7 engine code seems a kind of chassis problem, we try to show one by one the meaning and the solution.
Brief explanation of the C3971 Zender 30-7 code and definition of C3971 Zender 30-7 is the bottom side.

C3971 Zender 30-7 Meaning :

c Chassis Code
Problem is controller area network wiring bus and modules.
3 SAE - Generic
9 Fuel And Air Metering (Injector Circuit Malfunctions Only)
7 Vehicle Speed Output Circuit
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.

How To Fix C3971 Zender 30-7 ?

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.

C3971 Zender 30-7 Code Description:

Deactivation of cylinders is achieved by releasing a synchroniser pin that normally interlocks the cam follower and rocker arms. C3971 code resolves the synchroniser pin is released using hydraulic pressure which is controlled by a dedicated solenoid. When you see C3971 Zender 30-7 engine fault code on your engine code reader this description will help you.

C Codes List of all Chassis 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 C 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.

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