Hybspec

P1845

Wysoki

Code 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

Skrzynia automatycznaczujnik prędkości pojazdu (VSS)układ ABSTempomat (Cruise Control)prędkościomierzmoduł sterowania skrzynią (TCM)

Related codes

P1840Wysoki

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.

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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.