P1799 Code - Hold Switch Circuit Malfunction
Quick Answer
P1799 indicates Hold Switch Circuit Malfunction. Common causes include Faulty Hold Switch, Hold Switch harness is open or shorted, Hold Switch 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
- P1799 indicates Hold Switch Circuit Malfunction.
- Common causes
- Common causes include Faulty Hold Switch, Hold Switch harness is open or shorted, Hold Switch 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 P1799 Description
What are the Possible Causes of the DTC P1799?
- Faulty Hold Switch
- Hold Switch harness is open or shorted
- Hold Switch circuit poor electrical connection
How to Fix the DTC P1799?
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 P1799 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 P1799 Code
1. What does the OBDII code P1799 mean?
P1799 indicates a malfunction in the Hold Switch Circuit, which is typically related to the transmission's hold or manual shift mode system.
2. What are the common symptoms of code P1799?
Symptoms may include the hold mode not functioning, transmission stuck in a single gear, or an illuminated check engine light.
3. What causes the P1799 Hold Switch Circuit Malfunction?
Common causes include a faulty hold switch, damaged wiring or connectors, or issues with the transmission control module (TCM).
4. Can I still drive my car with code P1799?
While the vehicle may still be drivable, you may experience reduced transmission functionality or performance. It’s best to address the issue promptly.
5. How is code P1799 diagnosed?
A technician will inspect the hold switch, wiring, and connectors for damage and use a diagnostic scanner to monitor the hold circuit signals and TCM performance.
6. How do I fix the P1799 Hold Switch Circuit Malfunction?
Repairs may involve replacing the hold switch, repairing or replacing damaged wiring, or reprogramming or replacing the TCM.
7. What tools are needed to diagnose code P1799?
You’ll need an OBDII scanner, a multimeter to test wiring and connections, and possibly a wiring diagram for the hold switch circuit.
8. Is a faulty hold switch the only cause of code P1799?
No, other causes include wiring issues, poor electrical connections, or a malfunctioning TCM.
9. What is the hold switch used for?
The hold switch is part of the manual mode or hold mode in some automatic transmissions, allowing the driver to limit gear shifts or hold a specific gear.
10. Can code P1799 trigger other transmission-related codes?
Yes, if the circuit issue affects the TCM or other transmission components, you may see additional related codes.
Discuss the causes and fixes for P1799 OBDII Code
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