Intermittent Service Reminder Indicator (SRI) Lamp

An intermittent Service Reminder Indicator (SRI) lamp with no DTC present may be caused by following:

• Electrical system interference caused by a defective relay, powertrain control module (PCM)/engine control module (ECM) driven solenoid, or switch.
• Improper installation of electrical options such as lights, two-way radios, sound systems, or security systems.
• Ignition control wires should be routed away from ignition wires, ignition system components, and generator.
• Ignition secondary wires shorted to ground.
• SRI lamp driver wire or diagnostic test terminal intermittently shorted to ground.
• Intermittent loss of PCM/ECM ground connections.