Czujnik prędkości pojazdu (VSS) — usterka
P1845
WysokiCode P1845 indicates a vehicle speed sensor (VSS) fault or low voltage of the 2-3 shift solenoid in the automatic transmission. This code is manufacturer-specific and most often concerns Nissan and Infiniti vehicles.
OBD-II (EN): Vehicle Speed Sensor (VSS) Malfunction or Shift Solenoid 2-3 Low Voltage
Code P1845 most often indicates a vehicle speed sensor or automatic transmission solenoid fault – symptoms include no speedometer reading, jerking during gear changes, or activation of limp mode. Causes can vary: from a damaged sensor, through worn wiring, to degraded transmission fluid. Due to the impact on safety and the ABS system, prompt diagnostics at an authorized service center are recommended.
Symptoms
No correct speed reading on the dashboard (speedometer does not work or shows incorrect values); delayed, jerky, or incorrect gear shifts; activation of automatic transmission limp mode; illuminated Check Engine light (MIL); problems with cruise control operation; incorrect ABS system operation (VSS signal error).
Possible causes
• Damaged or worn vehicle speed sensor (VSS) – mechanical or electrical damage to the sensor • Damaged or corroded speed sensor wiring/connectors – open circuit or short circuit • Contaminated or degraded transmission fluid – deposits and metal filings affecting solenoid operation • Damaged 2-3 shift solenoid (low voltage in circuit) – internal fault or short circuit • Damaged transmission control module (TCM/PCM) – rare, after excluding other causes
Affected systems
Related codes
System sterowania skrzynią biegów — usterka
Elektrozawór zmiany biegu A — usterka obwodu
Elektrozawór zmiany biegów B — usterka
Kod P1840 jest kodem producenta (P1xxx) związanym najczęściej z obwodem czujnika pozycji skrzynki transferowej lub układem przełączania napędu 4WD. Dokładna interpretacja zależy od producenta pojazdu.
Suggested Hybspec services
Based on the systems affected by this code, we will most likely start with:
Does code P1845 require professional diagnostics?
The code alone is not enough. To find the cause, you need to read live data, check freeze frame conditions, and compare with vehicle behavior. Book a diagnostic session.
