The 2003 Altima,s fuel injection system is governed by a computer. Adjusting the idle on it can be expensive if it you take it to a shop. Resolving your problem may require the services of a professional, but there are three procedures you can try first, any one of which may work.
Clear Self-Learn Settings:
Disconnect the battery cables, first the negative (black), then the positive. Touch the cable ends together for ten seconds. Reconnect the cables to the battery. This should clear all of the self-learn settings.
Reset the Idle Air Volume Learn Function:
Turn the key on (but do not start the engine) for one second and off for ten seconds. Repeat three times. Time the intervals as accurately as possible. This should reset the idle air volume learn function.
Reset Throttle Valve Closed Position Learn:
The engine and transmission must be at normal operating temperature for this procedure. Drive the car around--don't just warm it up in the driveway. Turn the ignition off and wait ten seconds. Verify that the accelerator is fully released, then turn the ignition back on and wait for three seconds. Push the pedal in and release it fully five times within five seconds. Wait for seven seconds, then push the pedal in and hold it for twenty seconds. The MIL (Malfunction Indicator Lamp) will stop blinking and come on steady. Hold the pedal in until the MIL goes out. When it goes out, release the pedal and start the engine within 3 seconds.
Tips & Warnings
- If none of these procedures work to restore normal idle, you will probably have to take the car to a professional.
- Photo Credit Classic Car Engine Refurbished image by Janet Wall from Fotolia.com
Idle Relearn Procedures for a Chevy
Modern vehicles, such as those manufactured by Chevy, work in unison with computer modules within the engine compartment. An idle relearn procedure...
How to Troubleshoot a Nissan Maxima Engine Idling Problem
An engine idling problem in a Nissan Maxima can cause poor gas mileage or constant (and annoying) engine stalling. Fortunately, almost every...
How to Troubleshoot a 2002 Nissan Altima
The Altima has gone through four generations of redesigns. However, from 1994 to 2008, the Altima had numerous factory recalls. Despite being...
How Do I Fix a Car Idle Problem?
A car idling problem can cause intermittent stalling and make it difficult for your engine to operate properly. A low idle may...
How to Replace the Idle Air Control Valve
The idle air control valve in your vehicle is a very important component in maintaining the vehicle's regular idle speed. The valve,...
How to Adjust Idle on a Nissan Pathfinder
Idle speed on your Nissan Pathfinder is controlled by the on-board computer and is not normally adjusted during a tune-up. However, if...
How to Change a 2003 Nissan Altima 2.5 Serpentine Belt
The third generation Nissan Altima, model-years 2002-2006, uses a single serpentine belt to power the alternator, power steering pump, water pump, crankshaft...
How to Troubleshoot a Rough Idle on a Nissan Altima
A rough idle on a Nissan Altima can indicate that you need to change your spark plugs or you need to check...
How to Repair the IAC Valve on a Nissan
The idle air control valve is part of the air intake system on Nissan vehicles. It is a computer-controlled component that regulates...
How to Do a Nissan Altima Idle Relearn
In 2003 the Nissan Altima came equipped with an electronic throttle body. Whenever you disconnect the battery or replace the computer or...
The Dodge Relearn Procedures
Most cars have a computer to help keep their systems running properly. If you perform maintenance on your Dodge vehicle, your vehicle's...
Nissan Maxima Vacuum Leak Symptoms
A vacuum leak in a Nissan Maxima is caused by air infiltrating the engine. Instead of this air passing through the throttle...
EGR Valve Symptoms in an Altima
The Nissan Altima uses a digital electronic exhaust gas recirculation, or EGR, valve as part of its emissions system. The valve works...
Problems With the Maxima IACV
The idle air control valve, or IACV, in the Nissan Maxima is responsible for regulating the amount of air that flows through...