Diagnostic Trouble Code Definition

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

Traction Control System

⁽³⁾ No TCS Signal

21 ⁽¹⁾

Ignition Signal Circuit

⁽²⁾ Open/Shorted Circuit

ECU

Signals Not Normal

32 ⁽⁴⁾

EGR Function

No EGR Action

O2 Sensor (Left)

Open Circuit/High O2 Signal

34 ⁽¹⁾

Knock Sensor

Open/Shorted Circuit

35 ⁽⁴⁾

Exhaust Temperature Sensor

Open/Shorted Circuit

Throttle Sensor

Open/Shorted Circuit

45 ⁽⁴⁾

Injector Leak

Leak At Injectors

46 ⁽⁴⁾ (W/TCS)

Secondary Throttle Position Sensor

Open/Shorted Circuit

51 ⁽⁴⁾

Injector Circuit

Injector Does Not Work

O2 Sensor (Right)

Open Circuit/High O2 Signal

54 ⁽¹⁾

Automatic Transmission Signal

Open Signal Transmission Control Unit

55 ⁽¹⁾

No Malfunction (Q45)

Normal Condition

⁽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⁾	See ANTI-LOCK BRAKE SYSTEM article in the BRAKES Section.

⁽⁴⁾	California models.

Fig 1: Identifying Trouble Code Chart Symbols

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