Intermittent Failures
The term "intermittent failure" means a system may
have had a failure, but it checks OK now. If the
malfunction indicator lamp (MIL) on the dash does not
come on, check for poor
Electronic Control System
The functions of the fuel and emission control systems are managed by the
powertrain control module (PCM).
Self-diagnosis
The PCM detects a failure of a signal from a sensor
DTC P0506: Idle Control System RPM Lower
Than Expected
NOTE: Before you troubleshoot, record all freeze data
and any on-board snapshot, and review the general
troubleshooting information.
1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Start the engine. Hold the engine speed
Before disconnecting fuel lines or hoses, relieve
pressure from the system by disabling the fuel pump
and then disconnecting the fuel tube/quick connect
fitting in the engine compartment.
With the HDS
1. Make sure you have the anti-theft code for the
audio system.
2. Remove the fuel fill cap, to re