Mazda 121 C3990 Engine Trouble Code

When your car's 'Mazda 121 C3990 Check Engine' light comes on, it's usually accompanied by a sinking feeling in the pit of your stomach. The light could mean a costly problem, like a bad catalytic converter, or it could be something minor, like a loose gas cap. But in many cases, it means at minimum that you'll be visiting the car dealer to locate the malfunction and get the light turned off.

Mazda 121 C3990 Code Meaning :

When you check Mazda 121 car engine light came on code C3990 the reason should be . However manufacturer may have a different definition for the C3990 OBD-II Diagnostic Chassis (C) Trouble Code. So you should chech it on our car models.

C3990 OBD-II Diagnostic Chassis (C) Trouble Code Description

C3990 engine trouble code is about Reverse Input Circuit.

Reason For C3990 Code

The reason of C3990 OBD-II Engine Trouble Code is Engine Oil Temperature Sensor Malfunction.

C3990 code on vehicles with electronically controlled automatic transmissions, the 3-4 shift solenoid is responsible for actuating the hydraulic circuits to activate clutches or bands that change gears inside the automatic transmission.

C3989 Previous Engine Trouble Code For Mazda 121

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