How to Read Trouble Codes

The oxygen sensor monitor light flashes code corresponding to faulty part. The long segment (1.2 seconds) indicates a "10", the short segment (.2 seconds) signifies a "1". See Fig 1 .

When more than one trouble code is outputted, begin trouble shooting with the smallest trouble code number and proceed to next higher code.

Fig 1: How to Read a Trouble Code

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TROUBLE CODES

Code

Trouble

Crank Angle Sensor (No Reference Pulse)

Starter Switch

Crank Angle Sensor (No Position Pulse)

Fuel Injectors (No. 1 & 2)

Fuel Injectors (No. 3 & 4)

Coolant Temperature Sensor

Knock Sensor

Airflow Meter

24 ⁽¹⁾

By-pass Air Control Valve

25 ⁽¹⁾

Fuel Injectors (No. 3 & 4)

Throttle Sensor

Oxygen Sensor

Speed Sensor

34 ⁽²⁾

EGR Solenoid Valve

Purge Control Solenoid Valve

Lean Condition

Idle Switch

Neutral Switch

⁽¹⁾	6-cylinder XT model only.

⁽²⁾	Exc. Calif. models.

Fig 2: MPFI System Component Layout (Exc. XT Model)

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Fig 3: 1.8L MPFI System Component Layout (XT Model)

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Fig 4: 2.7L MPFI System Component Layout (XT Model)

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Fig 5: General Trouble Shooting Table (1 of 2)

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Fig 6: General Trouble Shooting Table (2 of 2)

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Fig 7: Trouble Shooting Chart for Self-Diagnosis

Fig 8: Memory Mode (1 of 3)

Fig 9: Memory Mode (2 of 3)

Fig 10: Memory Mode (3 of 3)

Fig 11: D-Check Mode (Exc. XT Model) (1 of 2)

Fig 12: D-Check Mode (Exc. XT Model) (2 of 2)

Fig 13: Clear Memory Mode

Fig 14: D-Check Mode (XT Model)

Fig 15: Clear Memory Mode (XT Model)