Your Mazda Sentia engine control system detects a problem, the computer stores the diagnostic trouble
code C3439 in its memory.
To figure out what is wrong with your vehicle you must first extract the C3439 DTC For Mazda Sentia.
On 1999 and later C3439 Mazda Sentia engines, the instrument cluster has a built-in self-diagnostic mode that can be accessed by pressing and holding the instrument cluster SELECT/RESET button. Insert the ignition key and turn to the RUN position (but don't crank or start engine). Continue to press and hold the SELECT/RESET button (for 5 seconds) until the word TEST is displayed by the odometer. Release the SELECT/RESET button within three seconds after the word TEST is displayed to begin the self-diagnostic mode.
C3439 Mazda Sentia DTC Meaning
Chassis Code - Problem is controller area network wiring bus and modules.
SAE - Generic
Fuel And Air Metering (Injector Circuit Malfunctions Only)
Low Coolant Circuit
A/C System High Pressure High Temperature
If your vehicle failed a C3439 Mazda Sentia test and the C3439 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 C3439 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 C3439 DTC For Mazda Sentia: Any conditions that might cause ignition misfire, an overly rich or lean fuel condition, or loss of compression.