P1585 GMC Code - Cruise Control Inhibit Output Circuit Conditions
Quick Answer
The P1585 GMC code refers to the Cruise Control Inhibit Output Circuit Conditions. Common causes include Faulty cruise control switch or buttons, Damaged wiring or connectors in the cruise control circuit, Failed cruise control module. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1585 GMC indicates Cruise Control Inhibit Output Circuit Conditions.
- Common causes
- Common causes include Faulty cruise control switch or buttons, Damaged wiring or connectors in the cruise control circuit, Failed cruise control module.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P1585 GMC Description
The P1585 GMC code refers to the Cruise Control Inhibit Output Circuit Conditions. This means that there is a problem with the circuit that controls the cruise control system in the vehicle. The cruise control system allows the driver to set a desired speed for the vehicle to maintain automatically, which can be very convenient for long highway drives. When this circuit is not functioning properly, it can lead to the cruise control system not working correctly or not working at all.
Common Causes of P1585 GMC
- Faulty cruise control switch or buttons.
- Damaged wiring or connectors in the cruise control circuit.
- Failed cruise control module.
- Issues with the vehicle's speed sensor.
- Malfunctioning brake pedal switch.
Symptoms of P1585 GMC
- Inability to set or maintain a constant speed using cruise control.
- Cruise control turning on and off randomly.
- Dashboard warning light related to cruise control illuminating.
- Vehicle speed fluctuating unexpectedly while cruise control is engaged.
How to Fix P1585 GMC
- Begin by conducting a thorough inspection of the cruise control components, including the switch, wiring, connectors, module, and speed sensor.
- Use a multimeter to test the continuity of the cruise control circuit to identify any areas of concern.
- Replace any faulty components identified during the inspection, such as the cruise control module or speed sensor.
- Clear the diagnostic trouble codes from the vehicle's system using an OBD-II scanner to reset the cruise control system.
- Test drive the vehicle to ensure that the cruise control system is now functioning correctly.
Cost to Fix P1585 GMC
The typical repair costs for addressing the P1585 GMC code can vary depending on the specific cause of the issue and the cost of parts and labor. In general, the repair for this code could range from $100 to $500, including parts and labor. It's important to keep in mind that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate based on your specific vehicle make and model.
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Frequently Asked Questions about P1585 GMC Code
1. What does the OBDII code P1585 mean on a GMC vehicle?
Code P1585 indicates an issue with the Cruise Control Inhibit Output Circuit, which prevents the cruise control system from operating correctly under certain conditions.
2. What are the common symptoms of code P1585 on a GMC?
Symptoms may include the cruise control not engaging, the cruise control system shutting off intermittently, or a warning light on the dashboard.
3. What causes the P1585 code on a GMC?
Common causes include a faulty cruise control inhibit relay, damaged wiring or connectors in the circuit, or issues with the powertrain control module (PCM).
4. Can P1585 affect other systems in the vehicle?
Yes, since the cruise control system is linked to the PCM, issues with this circuit may occasionally interfere with engine management or other related systems.
5. How is code P1585 diagnosed?
Technicians typically use an OBDII scanner, inspect circuit wiring and connectors, and test the cruise control inhibit relay for proper operation.
6. Can I still drive my GMC with code P1585 present?
Yes, the vehicle is generally drivable, but the cruise control function may not work properly, which could affect convenience during long drives.
7. How do you fix code P1585 on a GMC?
Repair steps include replacing the cruise control inhibit relay if faulty, repairing or replacing damaged wiring, and updating or reprogramming the PCM if necessary.
8. How much does it cost to fix code P1585 on a GMC?
Repair costs vary but typically range from $100 to $300, depending on whether parts like the relay or wiring need replacement.
9. Can a faulty brake switch cause code P1585 on a GMC?
Yes, a malfunctioning brake switch can send incorrect signals to the cruise control system, triggering the P1585 code.
10. Will clearing the P1585 code solve the problem permanently?
Clearing the code may temporarily remove it, but unless the underlying issue is fixed, the code is likely to return.
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