2020 Toyota Prius service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.
Designed for technicians and DIY owners, this manual helps you diagnose issues correctly, follow proven repair steps, and use wiring diagrams and system sections to track faults faster.
What’s included
- Step-by-step repair procedures and service information
- Specifications, torque values, and reference data
- Electrical diagnostics with full wiring diagrams
- Coverage across major systems: engine, transmission/driveline, brakes, steering, suspension, HVAC, and more
- Diagnostic trouble codes and troubleshooting flow
- Maintenance schedules and fluid capacities
Trims covered
- L Eco
- LE
- LE AWD-e
- Limited
- XLE
- XLE AWD-e
Index / Table of contents
- Body
- Brakes
- Chassis Electrical
- Driveline
- Engine Cooling
- Engine Electrical
- Engine Mechanical
- Engine Performance & Emission Controls
- Fuel System
- General Information & Identification
- Heating, Ventilation, & Air Conditioning
- Maintenance & Lubrication
- Specifications
- Steering
- Suspension
- Transmission, Clutch, & Transfer Case
- Diagnostic Trouble Codes
- Technical Service Bulletins
- Wiring Diagrams
OBSOLETE NOTICE January 30, 2026: This bulletin is now obsolete. Please see T-SB-0001-26.
Some 2018 2024 model year Toyota vehicles equipped with a Premium Audio with Dynamic Navigation System require a Special Service Tool (SST) USB flash drive to update the map, points of interest, and system software.
Some 2005 2026 Toyota vehicles that have undergone water intrusion may exhibit a condition in which a musty odor is present. Follow the procedures in this bulletin to remediate the odor and address this condition. The purpose of this Servic
Some ECUs can set a DTC that is common with other ECUs. This can lead to accidental use of the wrong repair manual when diagnosing these type of DTCs.
Some ECUs can set a DTC that is common with other ECUs. This can lead to accidental use of the wrong repair manual when diagnosing these type of DTCs.
The air conditioning dye injection tool kit has been developed to aid in identifying the location of air conditioning refrigerant leaks. The procedures outlined in this Service Bulletin aid in locating, inspecting, and repairing refrigerant
To assist with the early detection and early resolution of audio related concerns you may be asked to recover MMR data from the head unit. The following steps are instructions on how to retrieve the data from the system and are only to be u
To assist with the early detection and early resolution of audio related concerns you may be asked to recover MMR data from the head unit. The following steps are instructions on how to retrieve the data from the system and are only to be u
Showing the 8 most recent of 128 technical service bulletins on file with NHTSA.
I was the victim of an accident on [XXX]. The person of the other vehicle that collided with my vehicle after crossing at high speed and without stopping in the red light. The sensors of the anti-coll
I was the victim of an accident on [XXX]. The person of the other vehicle that collided with my vehicle after crossing at high speed and without stopping in the red light. The sensors of the anti-coll
I was the victim of an accident on [XXX]. The person of the other vehicle that collided with my vehicle after crossing at high speed and without stopping in the red light. The sensors of the anti-coll
MY DAD WAS DRIVING ON THE HIGHWAY. HE SAID THAT HE STEPPED ON THE BRAKES AND THE BRAKES DID NOT WORK. HE GOT INTO AN ACCIDENT IN WHICH THE ALL AIRBAGS WERE DEPLOYED AND THE CAR WAS TOTALED. THE CAR O
I TURNED LEFT INTO A PARKING SPACE IN MY 2020 PRIUS. I STEPPED ON THE BRAKE, AND MY CAR SHOT FORWARD. I COULDN'T STOP IT, AND IT HIT A CONCRETE POLE. IT ONLY TOOK 1 SECOND. IT SEEMS TOYOTA HYBRIDS AR
Showing the 5 most serious of 23 complaints filed with NHTSA.
