Your Mazda Activehicle engine control system detects a problem, the computer stores the diagnostic trouble
code C1644 in its memory.
To figure out what is wrong with your vehicle you must first extract the C1644 DTC For Mazda Activehicle.
A good ground connection is also extremely important. C1644 Mazda Activehicle engine problem because the presence of voltage at the panel harness won't make the panel work if there is a bad ground connection. Since the instrument cluster is mounted in a plastic dash, a separate ground wire or ground circuit through the wiring harness is usually needed to complete the power circuit. Refer again to the wiring diagram to find the ground path, and then check it with your ohmmeter. Do not use a self-powered test light because it cannot measure resistance (any resistance will lower circuit voltage).
C1644 Mazda Activehicle DTC Meaning
Chassis Code - Problem is controller area network wiring bus and modules.
MFG - Manufacturer Specific
Vehicle Speed Control And Idle Control System
Control Module Throttle Actuator Position Performance
Cruise Vehicle Speed/Set Speed Difference Too High
If your vehicle failed a C1644 Mazda Activehicle test and the C1644 Check Engine Light is NOT on, chances are you have a problem with the OBDII system, a burned out MIL lamp, or a faulty catalytic converter. The converter is essentially an afterburner that cleans up the exhaust after it exits the engine. The OBDII system uses C1644 a ownstream oxygen sensor to monitor the efficiency of the converter, and it should detect a drop in converter efficiency if the converter has been contaminated or is failing (ignition misfiring, leaky exhaust valves, and oil burning can all damage the converter). What you want to look C1644 DTC For Mazda Activehicle: Any conditions that might cause ignition misfire, an overly rich or lean fuel condition, or loss of compression.