NOTE: Electronically Controlled Transmission (ECT) uses same ECU as EFI system.

DIAGNOSTIC CODE IDENTIFICATION

Code

CHECK ENGINE Light

Signal Affected

⁽¹⁾ On

RPM Circuit No. 1

⁽²⁾ On

RPM Circuit No. 2

⁽¹⁾ On

Ignition No. 1

⁽¹⁾ On

Ignition No. 2

⁽¹⁾ On

⁽³⁾ ECT Control

⁽²⁾ On

Main Oxygen Sensor (Left Bank)

⁽²⁾ On

Water Temperature Sensor

⁽²⁾ On

Intake Air Temperature Sensor

⁽²⁾ On

Air/Fuel Ratio Lean Malfunction

⁽²⁾ On

Air/Fuel Ratio Rich Malfunction

⁽²⁾ On

Sub-Oxygen Sensor (Left Bank)

⁽²⁾ On

Main Oxygen Sensor (Right Bank)

⁽²⁾ On

Sub-Oxygen Sensor (Right Bank)

⁽¹⁾ On

Airflow Meter

⁽²⁾ On

⁽⁵⁾ HAC Sensor

⁽²⁾ On

Throttle Position Sensor

⁽⁴⁾ NA

Starter

⁽²⁾ On

Sub-Throttle Position Sensor

⁽⁴⁾ NA

Switch Condition

⁽¹⁾ On

No. 1 Knock Sensor

⁽¹⁾ On

Knock Control

⁽¹⁾ On

No. 2 Knock Sensor

⁽²⁾ On

EGR System Malfunction

⁽¹⁾	If vehicle is in test mode, diagnosis would not be performed on this item.

⁽²⁾	If vehicle is in test mode, CHECK ENGINE light would be on.

⁽³⁾	Electronically Controlled Transmission (ECT).

⁽⁴⁾	If vehicle is in test mode, CHECK ENGINE light would be off.

⁽⁵⁾	High Altitude Compensator (HAC) sensor.

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.

Safety Warning

Trouble Code Definition

Use the Manual With the Right Hardware

When to See a Mechanic

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