Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSMAZDA20086 S SPORT, 4D HATCHBACK, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTGAUGES & INSTRUMENT PANELSINSTRUMENTATION/DRIVER INFOINSTRUMENT CLUSTER INPUT/OUTPUT CHECK MODEINSPECTION OF CHECK CODESCHECK CODE 59

2008 Mazda 6 s Sport, 4D Hatchback, Standard

Check code 59

2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION Check code 59

CHECK CODE 59 DIAGNOSTIC PROCEDURE

STEP	INSPECTION	ACTION
1	The three digits number is indicated after selecting check code 59. Confirm the first digit from the right.	The CAN system is okay. Go to next step.
1		The DTC of CAN system is detected. Perform the DTC inspection. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM (L3, AJ)]. ) If the CAN system is okay, replace the instrument cluster. Go to next step.
2	Confirm the second digit from the right.	The wiring harnesses between the fuel gauge sender unit and instrument cluster are okay. Go to next step.
2	Confirm the second digit from the right.	Inspect following parts. Fuel gauge sender unit Wiring harness (Fuel gauge sender unit-instrument cluster) If fuel gauge sender unit and wiring harness are okay, replace the instrument cluster. Go to next step.
3	Confirm the third digit from the right.	The fuel pulse signal from the PCM is okay.
3	Confirm the third digit from the right.	Inspect the PCM. (See DTC TABLE [L3]. ) (See DTC TABLE [AJ]. ) (See PCM INSPECTION [L3]. ) (See PCM INSPECTION [AJ]. ) If the PCM is okay, replace the instrument cluster.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.