Possible causes – Low coolant level– Faulty Engine Coolant Temperature Sensor– Stuck or leaking thermostat– Engine Coolant Temperature Sensor harness is open or shorted– Engine Coolant Temperature Sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine

Possible causes – Open or short circuit condition– Poor electrical connection– Faulty relay Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

Possible causes – Poor data link electrical connection– Scan tool malfunction Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

Possible causes – Reprogram computer – Faulty ECM Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1643 MAZDA Description There is a communication problem with Control Area Network (CAN) link from the Engine Control Module (ECM)to the

Possible causes – Reprogram computer– Faulty Powertrain Control Module (PCM) Symptoms – Engine Light ON (or Service Engine Soon Warning Light) MAZDA Technical Service Bulletins for P1639 code 2001 MAZDA TRIBUTE POWER TRAIN 2002 MAZDA TRIBUTE POWER TRAIN 2001 MAZDA

Possible causes – Shorted injector circuit – Faulty fuel injector – Faulty fuel injector interface module Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1273 MAZDA Description A fault is detected by the fuel injector interface module

Possible causes – Synchronizer Assembly not properly installed.– Verify the cam sensor is synchronized– Faulty Engine Control Module (ECM)– Verify input sensor parameters are correct When is the code detected? Engine Control Module (ECM) disabled the misfire monitor Symptoms –

Possible causes – The vehicle is new from the factory.– Battery or Powertrain Control Module (PCM) had recently been disconnected.– An OBD monitor failure occurred before completion of an OBD drive cycle.– PCM Detected Trouble Codes (DTC) have recently been

Possible causes – Throttle Body Plate Binding– Faulty Throttle Actuator– Throttle Actuator harness is open or shorted– Throttle Actuator circuit poor electrical connection When is the code detected? Throttle valve locked during Engine Control Module (ECM) order to close Symptoms

Possible causes – Throttle Body Plate Binding– Faulty Throttle Actuator– Throttle Actuator harness is open or shorted– Throttle Actuator circuit poor electrical connection When is the code detected? Throttle valve locked during Engine Control Module (ECM) order to open Symptoms

Possible causes – Vacuum leak affecting bank 1 only– Fuel injector problem bank 1– Check for cylinder misfire on bank 1– Engine mechanical condition– Faulty O2 sensor. Tech notes Though the Oxygen (O2) sensor, the Engine Control Module (ECM) has

Possible causes – Variable Tumble Control Solenoid (VTCS) vacuum solenoid stuck closed– Faulty Variable Tumble Control Solenoid (VTCS)– Variable Tumble Control Solenoid (VTCS) harness is open or shorted– Variable Tumble Control Solenoid (VTCS) circuit poor electrical connection Symptoms – Engine

Symptoms – Engine Light ON (or Service Engine Soon Warning Light)