For 1990-2009 cars

### Diagnostic Instructions

• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

• | Review Strategy Based Diagnosis for an overview of the diagnostic approach.

• | Diagnostic Procedure Instructions provides an overview of each diagnostic category.

### DTC Descriptor

DTC P0313 00: Misfire Detected With Low Fuel Level

### Circuit/System Description

This diagnostic trouble code (DTC) indicates a ceittical low fuel content. The DTC is set to prevent the fuel system for an air cotamination.

### Conditions for Running the DTC

Engine is running

### Conditions for Setting the DTC

The ECU detects a critical low fuel content

### Action Taken When the DTC Sets

DTC P0313 is a Type C DTC

### Conditions for Clearing the DTC

DTC P0313 is a Type C DTC

### Reference Information

#### Schematic Reference

Engine Controls Schematics

#### Connector End View Reference

Component Connector End Views

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

#### Scan Tool Reference

Control Module References for scan tool information

### Circuit/System Verification

1. Verify that the DTC sets outside of the Conditions for Running and Setting. Since most occurrences of this DTC are caused by low fuel content, review with the customer the conditions under which the DTC set.

⇒ | If the DTC set within the Conditions for Running and Setting, the Engine is operating as designed.

2. Refill the fuel tank with diesel
3. Operate the vehicle within the conditions that the customer experienced and verify the DTC does not reset.

⇒ | If the DTC resets, replace the K20 Engine Control Module (ECM).

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for ECM replacement, setup, and programming