P1597
Speed Control Switch Always Low
P1597 is an OBD-II diagnostic trouble code meaning: Speed Control Switch Always Low. Common causes: faulty speed control switch, open or short circuit in the switch circuit. Estimated repair cost: $17–56.
Symptoms
- Cruise control doesn't work
- Check Engine Light on Dashboard
- The cruise control system activates spontaneously
- Trouble maintaining the set speed
- Errors in other speed control systems
Causes
- Faulty speed control switch
- Open or short circuit in the switch circuit
- Poor contact in connectors
- Wiring harness damage
- Engine control unit (ECU) malfunction
How to Fix
- Check the speed control switch for mechanical damage
- Check the integrity of the circuit and connectors of the switch
- Measure the resistance of the switch in different positions
- Check the presence of power and ground on the switch
- If necessary, replace the speed control switch
Related codes
Error P1597 by Vehicle Brand
FAQ
What does the P1597 code mean?
P1597 is an OBD-II diagnostic trouble code that indicates: Speed Control Switch Always Low
What causes a P1597 error code?
The most common causes of P1597 include: Faulty speed control switch; Open or short circuit in the switch circuit; Poor contact in connectors; Wiring harness damage.
How do I fix a P1597 diagnostic trouble code?
To fix P1597: Check the speed control switch for mechanical damage. Check the integrity of the circuit and connectors of the switch. Measure the resistance of the switch in different positions. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1597?
Yes, but get it checked soon
How much does it cost to fix P1597?
The estimated repair cost for P1597 is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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