Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA19994RUNNER LIMITED, 3.4 N, RWDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROL SYSTEM SELF-DIAGNOSTICS - V6DIAGNOSTIC TROUBLE CODE DEFINITIONS
1999 Toyota 4Runner Limited, 3.4 N, RWD
Diagnostic Trouble Code Definitions
1999 Toyota 4Runner Limited, 3.4 N, RWDSECTION Diagnostic Trouble Code Definitions
DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC (1) | Description | ||||||
|---|---|---|---|---|---|---|---|
| B2785 (2) | Ignition Switch On Malfunction | ||||||
| B2786 (2) | Ignition Switch Off Malfunction | ||||||
| B2791 (2) | Key Unlock Warning Switch Off Malfunction | ||||||
| B2795 (2) | Unmatched Key Code | ||||||
| B2796 (2) | No Communication In Immobilizer System | ||||||
| B2797 (2) | Communication Malfunction No. 1 | ||||||
| B2798 (2) | Communication Malfunction No. 2 | ||||||
| P0100 | Mass Airflow (MAF) Meter Circuit | ||||||
| P0101 | Mass Airflow (MAF) Meter Circuit Range/Performance | ||||||
| P0110 | Intake Air Temperature (IAT) Sensor Circuit | ||||||
| P0115 | Engine Coolant Temperature (ECT) Sensor Circuit | ||||||
| P0116 | Engine Coolant Temperature (ECT) Sensor Circuit Range/Performance | ||||||
| P0120 | Throttle Position (TP) Sensor Circuit | ||||||
| P0121 | Throttle Position (TP) Sensor Circuit Range/Performance | ||||||
| P0125 | Insufficient Coolant Temperature For Closed Loop Fuel Control (Except Calif. Emissions) | ||||||
| P0125 | Insufficient Coolant Temperature For Closed Loop Fuel Control (Calif. Emissions) | ||||||
| P0130 | Heated Oxygen Sensor No. 1 Circuit (Except Calif. Emissions) | ||||||
| P0133 | Heated Oxygen Sensor No. 1 Circuit Slow Response (Except Calif. Emissions) | ||||||
| P0135 | Heated Oxygen Sensor No. 1 Heater Circuit (Except Calif. Emissions) | ||||||
| P0136 | Heated Oxygen Sensor No. 2 Circuit | ||||||
| P0141 | Heated Oxygen Sensor No. 2 Heater Circuit | ||||||
| P0171 | System Too Lean (Except Calif. Emissions) | ||||||
| P0171 | System Too Lean (Calif. Emissions) | ||||||
| P0172 | System Too Rich (Except Calif. Emissions) | ||||||
| P0172 | System Too Rich (Calif. Emissions) | ||||||
| P0300 | Random Misfire Detected | ||||||
| P0301 | Cylinder No. 1 Misfire Detected | ||||||
| P0302 | Cylinder No. 2 Misfire Detected | ||||||
| P0303 | Cylinder No. 3 Misfire Detected | ||||||
| P0304 | Cylinder No. 4 Misfire Detected | ||||||
| P0305 | Cylinder No. 5 Misfire Detected | ||||||
| P0306 | Cylinder No. 6 Misfire Detected | ||||||
| P0325 | Knock Sensor No. 1 Circuit | ||||||
| P0330 | Knock Sensor No. 2 Circuit | ||||||
| P0335 | Crankshaft Position (CKP) Sensor Circuit | ||||||
| P0340 | Camshaft Position (CMP) Sensor Circuit | ||||||
| P0420 | Catalyst System Efficiency Below Threshold (Except Calif. Emissions) | ||||||
| P0420 | Catalyst System Efficiency Below Threshold (Calif. Emissions) | ||||||
| P0440 | Evaporative Emission Control System (EVAP) | ||||||
| P0441 | Incorrect EVAP Purge Flow | ||||||
| P0446 | EVAP Vent Control Circuit | ||||||
| P0450 | EVAP Pressure Sensor Circuit | ||||||
| P0451 | EVAP Pressure Sensor Range/Performance | ||||||
| P0500 | Vehicle Speed Sensor Circuit | ||||||
| P0505 | Idle Air Control (IAC) System Circuit | ||||||
| P0710 (3) | Transmission Fluid Temperature Sensor Malfunction | ||||||
| P0750 (3) | Shift Solenoid Valve No. 1 Malfunction | ||||||
| P0753 (3) | Shift Solenoid Valve No. 1 Electrical Malfunction | ||||||
| P0755 (3) | Shift Solenoid Valve No. 2 Malfunction | ||||||
| P0758 (3) | Shift Solenoid Valve No. 2 Electrical Malfunction | ||||||
| P0770 (3) | Lock-Up Solenoid Malfunction | ||||||
| P0773 (3) | Lock-Up Solenoid Circuit Electrical Malfunction | ||||||
| P1130 | Air/Fuel Sensor Circuit Range/Performance (Calif. Emissions) | ||||||
| P1133 | Air/Fuel Sensor Circuit Response (Calif. Emissions) | ||||||
| P1135 | Air/Fuel Sensor Heater Circuit (Calif. Emissions) | ||||||
| P1300 | Ignitor Circuit | ||||||
| P1335 | Crankshaft Position (CKP) Sensor Circuit | ||||||
| P1520 | Stoplight Switch Signal Circuit (A/T Only) | ||||||
| P1600 | ECM BATT Circuit | ||||||
| P1700 (3) | Vehicle Speed Sensor No. 2 Malfunction | ||||||
| P1780 | Park/Neutral Position (PNP) Switch Circuit | ||||||
|
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RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.