2021 Toyota 4runner Repair Guides

B0054[2021] Toyota 4runner B0054 — Right Squib Circuit Fault Diagnosis & Fix

Learn how to diagnose and repair B0054 (right-squib-circuit-fault) on your 2021 Toyota 4runner. Includes professional tips and common pitfalls.

Moderate

1-2 hours

B0104[2021] Toyota 4runner B0104 — Mode Door Actuator Circuit Diagnosis & Fix

DIY repair guide for B0104 issues in 2021 Toyota 4runner. Everything you need to diagnose and fix mode-door-actuator-circuit problems.

Moderate

30-60 minutes

B0204[2021] Toyota 4runner B0204 — Headlamp Aiming Switch Circuit Diagnosis & Fix

Expert troubleshooting and repair instructions for B0204 in 2021 Toyota 4runner vehicles. Includes diagnosis tips and cost estimates.

Easy

1-3 hours

P02732021 Toyota 4Runner P0273 — Fuel Injector 4 Circuit High Diagnosis & Repair Guide

Complete guide to diagnosing and repairing OBD-II code P0273 (Fuel Injector 4 Circuit High) on your 2021 Toyota 4Runner. Includes step-by-step diagnostics, repair strategies, torque specs, and expert tips.

Easy

1-2 hours

P02742021 Toyota 4Runner P0274 — Fuel Injector 4 Control Circuit Low Diagnosis & Repair Guide

Complete guide to diagnosing and repairing OBD-II code P0274 (Fuel Injector 4 Control Circuit Low) on your 2021 Toyota 4Runner. Includes step-by-step diagnostics, repair strategies, torque specs, and expert tips.

Moderate

3-4 hours

P02752021 Toyota 4Runner P0275 — Fuel Injector 4 Control Circuit High Diagnosis & Repair Guide

Complete guide to diagnosing and repairing OBD-II code P0275 (Fuel Injector 4 Control Circuit High) on your 2021 Toyota 4Runner. Includes step-by-step diagnostics, repair strategies, torque specs, and expert tips.

Advanced

2-3 hours

P02762021 Toyota 4Runner P0276 — Fuel Injector 5 Circuit Low Diagnosis & Repair Guide

Complete guide to diagnosing and repairing OBD-II code P0276 (Fuel Injector 5 Circuit Low) on your 2021 Toyota 4Runner. Includes step-by-step diagnostics, repair strategies, torque specs, and expert tips.

Moderate

4-6 hours

P02772021 Toyota 4Runner P0277 — Fuel Injector 5 Circuit High Diagnosis & Repair Guide

Complete guide to diagnosing and repairing OBD-II code P0277 (Fuel Injector 5 Circuit High) on your 2021 Toyota 4Runner. Includes step-by-step diagnostics, repair strategies, torque specs, and expert tips.

Advanced

2-3 hours

P02782021 Toyota 4Runner P0278 — Fuel Injector 5 Control Circuit Low Diagnosis & Repair Guide

Complete guide to diagnosing and repairing OBD-II code P0278 (Fuel Injector 5 Control Circuit Low) on your 2021 Toyota 4Runner. Includes step-by-step diagnostics, repair strategies, torque specs, and expert tips.

Advanced

1-2 hours

P02792021 Toyota 4Runner P0279 — Fuel Injector 5 Control Circuit High Diagnosis & Repair Guide

Complete guide to diagnosing and repairing OBD-II code P0279 (Fuel Injector 5 Control Circuit High) on your 2021 Toyota 4Runner. Includes step-by-step diagnostics, repair strategies, torque specs, and expert tips.

Moderate

2-3 hours

P02802021 Toyota 4Runner P0280 — Fuel Injector 6 Circuit Low Diagnosis & Repair Guide

Complete guide to diagnosing and repairing OBD-II code P0280 (Fuel Injector 6 Circuit Low) on your 2021 Toyota 4Runner. Includes step-by-step diagnostics, repair strategies, torque specs, and expert tips.

Moderate

1-2 hours

P02812021 Toyota 4Runner P0281 — Fuel Injector 6 Circuit High Diagnosis & Repair Guide

Complete guide to diagnosing and repairing OBD-II code P0281 (Fuel Injector 6 Circuit High) on your 2021 Toyota 4Runner. Includes step-by-step diagnostics, repair strategies, torque specs, and expert tips.

Moderate

2-3 hours

P02822021 Toyota 4Runner P0282 — Fuel Injector 6 Control Circuit Low Diagnosis & Repair Guide

Complete guide to diagnosing and repairing OBD-II code P0282 (Fuel Injector 6 Control Circuit Low) on your 2021 Toyota 4Runner. Includes step-by-step diagnostics, repair strategies, torque specs, and expert tips.

Easy

1-2 hours

P02832021 Toyota 4Runner P0283 — Fuel Injector 6 Control Circuit High Diagnosis & Repair Guide

Complete guide to diagnosing and repairing OBD-II code P0283 (Fuel Injector 6 Control Circuit High) on your 2021 Toyota 4Runner. Includes step-by-step diagnostics, repair strategies, torque specs, and expert tips.

Advanced

1-2 hours

P03002021 Toyota 4Runner P0300 — Random/Multiple Cylinder Misfire Detected Diagnosis & Repair Guide

Complete guide to diagnosing and repairing OBD-II code P0300 (Random/Multiple Cylinder Misfire Detected) on your 2021 Toyota 4Runner. Includes step-by-step diagnostics, repair strategies, torque specs, and expert tips.

Moderate

2-3 hours

P03012021 Toyota 4Runner P0301 — Cylinder 1 Misfire Detected Diagnosis & Repair Guide

Complete guide to diagnosing and repairing OBD-II code P0301 (Cylinder 1 Misfire Detected) on your 2021 Toyota 4Runner. Includes step-by-step diagnostics, repair strategies, torque specs, and expert tips.

Moderate

1-2 hours

P03022021 Toyota 4Runner P0302 — Cylinder 2 Misfire Detected Diagnosis & Repair Guide

Complete guide to diagnosing and repairing OBD-II code P0302 (Cylinder 2 Misfire Detected) on your 2021 Toyota 4Runner. Includes step-by-step diagnostics, repair strategies, torque specs, and expert tips.

Easy

2-3 hours

P03032021 Toyota 4Runner P0303 — Cylinder 3 Misfire Detected Diagnosis & Repair Guide

Complete guide to diagnosing and repairing OBD-II code P0303 (Cylinder 3 Misfire Detected) on your 2021 Toyota 4Runner. Includes step-by-step diagnostics, repair strategies, torque specs, and expert tips.

Easy

4-6 hours

P03042021 Toyota 4Runner P0304 — Cylinder 4 Misfire Detected Diagnosis & Repair Guide

Complete guide to diagnosing and repairing OBD-II code P0304 (Cylinder 4 Misfire Detected) on your 2021 Toyota 4Runner. Includes step-by-step diagnostics, repair strategies, torque specs, and expert tips.

Moderate

4-6 hours

P03052021 Toyota 4Runner P0305 — Cylinder 5 Misfire Detected Diagnosis & Repair Guide

Complete guide to diagnosing and repairing OBD-II code P0305 (Cylinder 5 Misfire Detected) on your 2021 Toyota 4Runner. Includes step-by-step diagnostics, repair strategies, torque specs, and expert tips.

Easy

3-4 hours

P03062021 Toyota 4Runner P0306 — Cylinder 6 Misfire Detected Diagnosis & Repair Guide

Complete guide to diagnosing and repairing OBD-II code P0306 (Cylinder 6 Misfire Detected) on your 2021 Toyota 4Runner. Includes step-by-step diagnostics, repair strategies, torque specs, and expert tips.

Easy

2-3 hours

P03072021 Toyota 4Runner P0307 — Cylinder 7 Misfire Detected Diagnosis & Repair Guide

Complete guide to diagnosing and repairing OBD-II code P0307 (Cylinder 7 Misfire Detected) on your 2021 Toyota 4Runner. Includes step-by-step diagnostics, repair strategies, torque specs, and expert tips.

Advanced

4-6 hours

P03082021 Toyota 4Runner P0308 — Cylinder 8 Misfire Detected Diagnosis & Repair Guide

Complete guide to diagnosing and repairing OBD-II code P0308 (Cylinder 8 Misfire Detected) on your 2021 Toyota 4Runner. Includes step-by-step diagnostics, repair strategies, torque specs, and expert tips.

Moderate

2-3 hours

P03102021 Toyota 4Runner P0310 — Cylinder 10 Misfire Detected Diagnosis & Repair Guide

Complete guide to diagnosing and repairing OBD-II code P0310 (Cylinder 10 Misfire Detected) on your 2021 Toyota 4Runner. Includes step-by-step diagnostics, repair strategies, torque specs, and expert tips.

Moderate

2-3 hours

P03152021 Toyota 4Runner P0315 — Crankshaft Position Sensor Variation Diagnosis & Repair Guide

Complete guide to diagnosing and repairing OBD-II code P0315 (Crankshaft Position Sensor Variation) on your 2021 Toyota 4Runner. Includes step-by-step diagnostics, repair strategies, torque specs, and expert tips.

Moderate

1-2 hours

P03202021 Toyota 4Runner P0320 — Ignition/Distributor Engine Speed Input Circuit Diagnosis & Repair Guide

Complete guide to diagnosing and repairing OBD-II code P0320 (Ignition/Distributor Engine Speed Input Circuit) on your 2021 Toyota 4Runner. Includes step-by-step diagnostics, repair strategies, torque specs, and expert tips.

Moderate

1-2 hours

P03252021 Toyota 4Runner P0325 — Knock Sensor 1 Circuit Bank 1 Diagnosis & Repair Guide

Complete guide to diagnosing and repairing OBD-II code P0325 (Knock Sensor 1 Circuit Bank 1) on your 2021 Toyota 4Runner. Includes step-by-step diagnostics, repair strategies, torque specs, and expert tips.

Easy

1-2 hours

P03302021 Toyota 4Runner P0330 — Knock Sensor 2 Circuit Bank 2 Diagnosis & Repair Guide

Complete guide to diagnosing and repairing OBD-II code P0330 (Knock Sensor 2 Circuit Bank 2) on your 2021 Toyota 4Runner. Includes step-by-step diagnostics, repair strategies, torque specs, and expert tips.

Easy

2-3 hours

P03352021 Toyota 4Runner P0335 — Crankshaft Position Sensor A Circuit Diagnosis & Repair Guide

Complete guide to diagnosing and repairing OBD-II code P0335 (Crankshaft Position Sensor A Circuit) on your 2021 Toyota 4Runner. Includes step-by-step diagnostics, repair strategies, torque specs, and expert tips.

Moderate

2-3 hours

P03402021 Toyota 4Runner P0340 — Camshaft Position Sensor Circuit Diagnosis & Repair Guide

Complete guide to diagnosing and repairing OBD-II code P0340 (Camshaft Position Sensor Circuit) on your 2021 Toyota 4Runner. Includes step-by-step diagnostics, repair strategies, torque specs, and expert tips.

Advanced

2-3 hours

P03412021 Toyota 4Runner P0341 — Camshaft Position Sensor Range/Performance Diagnosis & Repair Guide

Complete guide to diagnosing and repairing OBD-II code P0341 (Camshaft Position Sensor Range/Performance) on your 2021 Toyota 4Runner. Includes step-by-step diagnostics, repair strategies, torque specs, and expert tips.

Advanced

2-3 hours

P03422021 Toyota 4Runner P0342 — Camshaft Position Sensor Circuit Low Diagnosis & Repair Guide

Complete guide to diagnosing and repairing OBD-II code P0342 (Camshaft Position Sensor Circuit Low) on your 2021 Toyota 4Runner. Includes step-by-step diagnostics, repair strategies, torque specs, and expert tips.

Moderate

1-2 hours

P03432021 Toyota 4Runner P0343 — Camshaft Position Sensor Circuit High Diagnosis & Repair Guide

Complete guide to diagnosing and repairing OBD-II code P0343 (Camshaft Position Sensor Circuit High) on your 2021 Toyota 4Runner. Includes step-by-step diagnostics, repair strategies, torque specs, and expert tips.

Moderate

3-4 hours

P04002021 Toyota 4Runner P0400 — Exhaust Gas Recirculation Flow Diagnosis & Repair Guide

Complete guide to diagnosing and repairing OBD-II code P0400 (Exhaust Gas Recirculation Flow) on your 2021 Toyota 4Runner. Includes step-by-step diagnostics, repair strategies, torque specs, and expert tips.

Advanced

2-3 hours

P04012021 Toyota 4Runner P0401 — Exhaust Gas Recirculation Flow Insufficient Diagnosis & Repair Guide

Complete guide to diagnosing and repairing OBD-II code P0401 (Exhaust Gas Recirculation Flow Insufficient) on your 2021 Toyota 4Runner. Includes step-by-step diagnostics, repair strategies, torque specs, and expert tips.

Advanced

3-4 hours

P04022021 Toyota 4Runner P0402 — Exhaust Gas Recirculation Flow Excessive Diagnosis & Repair Guide

Complete guide to diagnosing and repairing OBD-II code P0402 (Exhaust Gas Recirculation Flow Excessive) on your 2021 Toyota 4Runner. Includes step-by-step diagnostics, repair strategies, torque specs, and expert tips.

Easy

2-3 hours

P05082021 Toyota 4Runner P0508 — Idle Air Control System Circuit Low Diagnosis & Fix

Complete guide to diagnosing and fixing the P0508 (Idle Air Control System Circuit Low) error code on your 2021 Toyota 4Runner. Includes step-by-step instructions, repair costs, and expert tips.

Moderate

2-3 hours

P08162021 Toyota 4runner P0816 — Clutch Temperature Warning Circuit Diagnosis & Fix

The clutch temperature sensor has triggered a warning, indicating excessive heat buildup.

Advanced

1-2 hours

P08372021 Toyota 4runner P0837 — 4WD Switch Performance Problem Diagnosis & Fix

The 4WD switch is not providing expected resistance values or response times.

Moderate

1-2 hours

P08482021 Toyota 4runner P0848 — Brake Booster Pressure Sensor High Diagnosis & Fix

P0848 indicates abnormally high pressure reading from the brake booster sensor.

Advanced

1-3 hours

P08672021 Toyota 4runner P0867 — TCM Power Relay Performance Diagnosis & Fix

P0867 indicates the TCM power relay is not providing consistent power delivery.

Advanced

1-3 hours

P11742021 Toyota 4runner P1174 - FUEL TANK INTEGRITY SYSTEM MALFUNCTION Diagnosis & Fix

Expert diagnosis and repair guide for P1174 (Fuel tank integrity system malfunction) in 2021 Toyota 4runner. Includes wiring checks, sensor testing, and module communication diagnostics.

Advanced

3-5 hours

P15682021 Toyota 4runner P1568 — Steering Control Module Diagnosis & Fix

Complete diagnostic guide for P1568 on 2021 Toyota 4runner. Learn symptoms, causes, and step-by-step repair procedures.

Moderate

2 hours