Stop Light Switch Signal Malfunction
Table of contents
P1520 TOYOTA Possible Causes
- Faulty Stop Light Switch
- Stop Light Switch harness is open or shorted
- Stop Light Switch circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How do I fix code P1520 TOYOTA?
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.
Cost of diagnosing the P1520 TOYOTA code
The cost of diagnosing the P1520 TOYOTA 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)
P1520 TOYOTA Description
This signal is used to detect when the brakes have been applied. The STP signal voltage is the same as the voltage supplied to the stop lights. The STP signal is used mainly to control the fuel cut–off engine speed (The fuel cut–off engine speed is reduced slightly when the vehicle is braking).