NOTE: When DTC tests indicate to check a component, see indicated component in I - SYS/COMP TESTS article in the ENGINE PERFORMANCE Section. For Diagnostic Trouble Code (DTC) illustration symbol identification, see Fig 1 . To identify ECM connector terminals, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

TROUBLE CODE IDENTIFICATION

Code

System Affected

Probable Cause

11 ⁽¹⁾

Crankshaft Position Sensor

⁽²⁾ No Crank Signal

Mass Airflow Sensor Circuit

Open/Shorted Circuit

Engine Coolant Temp. Sensor

Open/Shorted Circuit

Vehicle Speed Sensor (VSS)

No VSS Signal

21 ⁽¹⁾

Ignition Signal Circuit

⁽²⁾ Open/Shorted Circuit

ECM

Signals Not Normal

32 ⁽³⁾

EGR Function

No EGR Operation

HO2S Sensor

Open/Shorted Circuit/High HO2S Signal

34 ⁽¹⁾

Knock Sensor

Open/Shorted Circuit

35 ⁽³⁾

EGR Temperature Sensor

Open/Shorted Circuit

Throttle Position Sensor

Open/Shorted Circuit

45 ⁽³⁾

Injector Leak

Leak At Injectors

54 ⁽⁴⁾⁽¹⁾

Automatic Transmission Signal

Open Signal Transmission Control Unit

55 ⁽¹⁾

No Malfunction

Normal Condition

⁽¹⁾	Trouble code will not activate Malfunction Indicator Light (MIL).

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

⁽³⁾	California models.

⁽⁴⁾	Models with automatic transmission, Serial No. 450021 and later.

Fig 1: DTC Illustration Symbol ID

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

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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