Your Mazda 6 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 6.
Do you have fresh, clean fuel in the tank? If it's empty, fill it up and go! If it's full, check C1644 Mazda 6 that the fuel shut-off valve is open and that it is clean. Stale fuel, dirt and debris are the most common cause of outdoor power equipment not starting properly. If you store equipment with untreated gas in the tank, it can lead to engine damage.
C1644 Mazda 6 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 6 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 6: Any conditions that might cause ignition misfire, an overly rich or lean fuel condition, or loss of compression.