Diagnostic Trouble Code Identification

NOTE: When using trouble code charts, refer to Fig 1 for symbol identification.

DIAGNOSTIC TROUBLE CODE IDENTIFICATION CHART

Code

System Affected

Probable Cause

11 ⁽¹⁾

Crank Angle Sensor

⁽²⁾ No Crank Signal

Airflow Meter Circuit

Open/Shorted Circuit

Coolant Temperature Sensor

Open/Shorted Circuit

Vehicle Speed Sensor (VSS)

No VSS Signal

21 ⁽¹⁾

Ignition Signal Circuit

⁽²⁾ Open/Shorted Circuit

22 ⁽¹⁾

Fuel Pump Circuit

Open/Shorted Circuit

ECU

Signals Not Normal

32 ⁽³⁾

EGR Function

No EGR Action

O2 Sensor (Left)

Open Circuit/High O2 Signal

34 ⁽¹⁾

Knock Sensor

Open/Shorted Circuit

35 ⁽³⁾

Exhaust Temperature Sensor

Open/Shorted Circuit

Fuel Temperature Sensor

Open/Shorted Circuit

Throttle Sensor

Open/Shorted Circuit

45 ⁽³⁾

Injector Leak

Leak At Injectors

51 ⁽³⁾

Injector Circuit

Injector Does Not Work

⁽¹⁾	Trouble code will not activate CHECK ENGINE light.

⁽²⁾	If Codes 11 and 21 are present at same time, check items causing a malfunction of crank angle sensor circuit first.

⁽³⁾	California models.

Fig 1: Identifying Trouble Code Chart Symbols

Courtesy of NISSAN MOTOR CO., U.S.A.