B3021 Mazda Sentia OBD Code

OBD/2 B3021 error code description and symptoms.

The Camshaft Position sensor will signal the Engine Control Module when the #1 cylinder is ready for the spark plug to fire (top-dead-center on compression stroke). The ECM uses the information from this sensor to help calculate fuel delivery and spark timing.

In most cases, the TCM is integrated into a single housing with the PCM. Nevertheless, the section of the module which controls (automatic) transmission function may be powered up separately. In any case, the TCM is typically powered using switched (only present with the ignition switch in the ON, start, or run position) voltage. This circuit is normally equipped with a fuse, fusible link, and/or a relay. Frequently, the PCM and TCM are powered using the same relay albeit by separate circuits. Access to a reliable vehicle information source will yield necessary details of the TCM power circuit for the specific vehicle in question.

B3021 Mazda Sentia Error Code Repair Process :

For engine speed input circuit range/performance check engine light is perhaps the most troubling of lights because it could mean so many different things, from you didn't screw the gas cap on tightly enough to look out for pistons flying through the hood and into the stratosphere. The easiest way to find out what this light is telling you is to hook your vehicle up to a scan tool. B3021 error code diagnostic tool looks a little like an oversized calculator and plugs into a communication port inside the car. After you instruct it to perform the scan, it speaks engine speed input circuit range/performance with your car's computers to find out exactly what's prompting the light to turn on.

Common Causes of Mazda Sentia B3021 OBD2 Code

A common cause of code B3021 is the failure of Engine Speed Input Circuit Range/Performance, but there are several other possible causes as well, such as ;

Clogged or faulty fuel injector (s)
Damaged camshaft position (CMP) sensor
Air fuel ratio (A/F) Sensor 1 Bank 1 circuit poor electrical connection
Oil flow restriction in the oil passages or the VCT valve body

B3021 is a kind of Body Trouble Code

Auto body problems aren't always easy to spot. Diagnosing auto body problems sometimes requires a little know-how. In this section you'll find articles dedicated to teaching you how to diagnose auto body problems.

Engine OBD 2 Codes website is a freeware resource center for engine trouble codes.

About Us | Contact | Privacy

B3021 Mazda Sentia OBD Code

B3021 Mazda Sentia Error Code Repair Process :

Common Causes of Mazda Sentia B3021 OBD2 Code

B3021 code for other Mazda cars