garajizOBD-II code · manufacturer-specific
P1791
3-2 Downshift Error
- System
- P1 — Powertrain (manufacturer-specific)
- Severity
- Moderate (3/5)
- Can I keep driving?
- Drive with caution
What does P1791 mean?
P1791 is defined as “3-2 Downshift Error”.
Drive gently and only as far as you need to; have it checked as soon as possible.
Manufacturer-specific meanings
The same code can mean something different on some makes.
- Jaguar: Ignition Supply Malfunction
- Mitsubishi: PCM ECT Level Signal To TCM Circuit Fault
- Acura, Honda, Infiniti: TCM A/T Vehicle Speed Sensor Circuit Fault
- Citroen, Diğer, Peugeot: TP (Electric) Circuit Malfunction
- Mazda, Nissan: TP Electric Circuit
- Buick, Cadillac, Chevrolet, GM, GMC, Oldsmobile, Saturn: Transmission Control Module Loop
- Volkswagen: Transmission Range Display Circuit Short To Ground
Related codes
Look up another code
This page is general information; an exact diagnosis needs measurements and a technician’s check.