This code indicates that the engine control module (ECM) has detected that the air/fuel mixture in the engine is too lean at idle. This can be caused by a number of factors, including:
* A vacuum leak
* A faulty oxygen sensor
* A faulty fuel injector
* A faulty mass air flow sensor
* A faulty throttle body
If you are experiencing this code, it is important to have your vehicle diagnosed by a qualified mechanic as soon as possible. Driving with a lean air/fuel mixture can damage your engine.
Possible Causes
* Vacuum leak
* Faulty oxygen sensor
* Faulty fuel injector
* Faulty mass air flow sensor
* Faulty throttle body
Symptoms
* Check engine light on
* Rough idle
* Stalling
* Loss of power
* Increased fuel consumption
Diagnosis
A qualified mechanic will use a variety of diagnostic tools to identify the cause of this code, including:
* A scan tool to retrieve the code from the ECM
* A vacuum gauge to check for leaks
* A fuel pressure gauge to check for low fuel pressure
* A multimeter to check the oxygen sensor and fuel injectors
* A mass air flow sensor to check the airflow into the engine
* A throttle body cleaner to clean the throttle body
Repair
The repair for this code will depend on the cause of the problem. Some common repairs include:
* Replacing the vacuum hose
* Replacing the oxygen sensor
* Replacing the fuel injector
* Replacing the mass air flow sensor
* Cleaning the throttle body
Cost of Repair
The cost of repair for this code will vary depending on the cause of the problem and the make and model of your vehicle. However, you can expect to pay between $100 and $500 for the repair.
