MIL ON - DTC 45 (Injector Leak): Overview

Classification:
EF & EC95-05

Section:
Engine Fuel & Emission Control

Reference:
Technical Bulletin NTB95021

Date:
March 8, 1995

POOR ENGINE DRIVEABILITY and/or CHECK ENGINE LIGHT ON (CODE 45- INJECTOR LEAK)

APPLIED VEHICLES:
All Pre-OBD II, CONSULT compatible vehicles

SERVICE INFORMATION

This bulletin outlines procedures and methods to isolate the cause(s) of mixture related driveability incidents. The bulletin also covers incidents where the check engine light is illuminated and code 45 is stored, but there are no driveability symptoms.

SERVICE PROCEDURE

NOTE:
^ ANY SENSOR INPUT THAT CAN CAUSE A "RICH" FUEL SIGNAL CAN CAUSE AN INJECTOR LEAK CODE.

^ ANY CAUSE FOR EXCESSIVE FUEL PRESSURE CAN CAUSE AN INJECTOR LEAK CODE.

The best way to resolve a Code 45 or driveability incident is to carefully go through ALL the following steps:

1. CONSULT ALPHA TEST

2. MASS AIR FLOW SENSOR TEST

3. FUEL PRESSURE REGULATOR TEST

4. INJECTOR LEAK DOWN TEST

5. ENGINE COOLANT TEMPERATURE SENSOR TEST

6. OXYGEN (02) SENSOR TEST

7. QUALITY CONTROL CHECK