Low Coast Brake Solenoid Valve Function
Table of contents
P1774 INFINITI Possible Causes
- Faulty Low Coast Brake Solenoid Valve
- Low Coast Brake Solenoid Valve harness is open or shorted
- Low Coast Brake Solenoid Valve circuit poor electrical connection
- Faulty Transmission Valve Body
How do I fix code P1774 INFINITI?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Tech Notes
- There is a Factory Service Bulletin for all 2003–2010 Infiniti vehicles with 5-Speed A/T RE5R05A Transmission:
- 2003–2010 Infiniti RE5R05A Transmission Factory Service Bulletin OBDII Code P1774
Cost of diagnosing the P1774 INFINITI code
The cost of diagnosing the P1774 INFINITI code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1774 INFINITI Description
Low Coast Brake Solenoid Valve is turned “ON” or “OFF” by the Transmission Control Module (TCM) in response to signals sent from the Park & Neutral Position (PNP) Switch, Vehicle Speed Sensor (VSS), and Accelerator Pedal Position (APP) Sensor (Throttle Position Sensor). Gears will then be shifted to the optimum position. The Diagnostic Trouble Code (DTC) will set when the Low Coast Brake Solenoid Valve does not respond from the TCM signal.