P1585 GMC Code - Cruise Control Inhibit Output Circuit Conditions
Quick Answer
With the key on or engine running, system voltage from 9-18v, the Powertrain Control Module (PCM) detects an improper voltage on the Cruise Control Inhibit driver circuit, condition met for at least 30 seconds. Common causes include Faulty Cruise Control Module, Cruise Control Module harness open or shorted, Cruise Control Module circuit poor electrical connection. 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 Module, Cruise Control Module harness open or shorted, Cruise Control Module circuit poor electrical connection.
- 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.
Code P1585 GMC Description
What are the Possible Causes of the DTC P1585 GMC?
- Faulty Cruise Control Module
- Cruise Control Module harness open or shorted
- Cruise Control Module circuit poor electrical connection
How to Fix the DTC P1585 GMC?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1585 GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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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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