LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2006 >> Prius >> Repair and Diagnosis >> Engine Performance >> Engine Control System (1NZ-FXE) >> SFI System >> Diagnostic Trouble Code Chart
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Trouble Code Chart

HINT:

Parameters listed in the chart may be different than your readings depending on the type of instrument and other factors.

If any DTCs are displayed during a check mode DTC check, check the circuit for the DTCs listed in the table below. For details of each DTC, + refer to the page indicated.

DIAGNOSTIC TROUBLE CODE CHART

DTC No. Detection Item Trouble Area MIL Memory
P0010  Camshaft Position "A" Actuator Circuit (Bank 1)
  • Open or short in oil control valve circuit
  • Oil control valve
  • ECM
Come on DTC Stored
 
P0011  Camshaft Position "A" - Timing Over- Advanced or System Performance (Bank 1)
  • Valve timing
  • Oil control valve
  • Camshaft timing gear assembly
  • ECM
Come on DTC Stored
P0012  Camshaft Position "A" - Timing Over- Retarded (Bank 1)
  • Same as DTC P0011
Come on DTC Stored
P0016  Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A)
  • Mechanical system (timing chain has jumped a tooth, chain stretched)
  • ECM
Come on DTC Stored
P0031  Oxygen (A/F) Sensor Heater Control Circuit Low (Bank 1 Sensor 1)
  • Open or short in heater circuit of A/F sensor
  • A/F sensor heater
  • EFI M relay (Integration relay)
  • ECM
Come on DTC Stored
P0032  Oxygen (A/F) Sensor Heater Control Circuit High (Bank 1 Sensor 1)
  • Short in heater circuit of A/F sensor
  • A/F sensor heater
  • EFI M relay (Integration relay)
  • ECM
Come on DTC Stored
P0037  Oxygen Sensor Heater Control Circuit Low (Bank 1 Sensor 2)
  • Open or short in heater circuit of the heated oxygen sensor
  • Heated oxygen sensor heater
  • EFI M relay (integration relay)
  • ECM
Come on DTC Stored
P0038  Oxygen Sensor Heater Control Circuit High (Bank 1 Sensor 2)
  • Short in heater circuit of the heated oxygen sensor
  • Heated oxygen sensor heater
  • EFI M relay (integration relay)
  • ECM
Come on DTC Stored
P0100  Mass or Volume Air Flow Circuit
  • Open or short in mass air flow meter circuit
  • Mass air flow meter
  • ECM
Come on DTC Stored
P0101  Mass Air Flow Circuit Range / Performance Problem
  • Mass air flow meter
Come on DTC Stored
P0102  Mass or Volume Air Flow Circuit Low Input
  • Open in mass air flow meter circuit
  • Mass air flow meter
  • ECM
Come on DTC Stored
P0103  Mass or Volume Air Flow Circuit High Input
  • Short in mass air flow meter circuit
  • Mass air flow meter
  • ECM
Come on DTC Stored
P0110  Intake Air Temperature Circuit
  • Open or short in intake air temperature sensor circuit
  • Intake air temperature sensor (built in mass air flow meter)
  • ECM
Come on DTC Stored
P0112  Intake Air Temperature Circuit Low Input
  • Short in intake air temperature sensor circuit
  • Intake air temperature sensor (built in mass air flow meter)
  • ECM
Come on DTC Stored
P0113  Intake Air Temperature Circuit High Input
  • Open in intake air temperature sensor circuit
  • Intake air temperature sensor (built in mass air flow meter)
  • ECM
Come on DTC Stored
P0115  Engine Coolant Temperature Circuit
  • Open or short in engine coolant temperature sensor circuit
  • Engine coolant temperature sensor
  • ECM
Come on DTC Stored
P0116  Engine Coolant Temperature Circuit Range / Performance Problem
  • Engine coolant temperature sensor
Come on DTC Stored
P0117  Engine Coolant Temperature Circuit Low Input
  • Short in engine coolant temperature sensor circuit
  • Engine coolant temperature sensor
  • ECM
Come on DTC Stored
P0118  Engine Coolant Temperature Circuit High Input
  • Open in engine coolant temperature sensor circuit
  • Engine coolant temperature sensor
  • ECM
Come on DTC Stored
P0120  Throttle Pedal Position Sensor / Switch "A" Circuit Malfunction
  • Open or short in throttle position sensor circuit
  • Throttle position sensor (built in throttle body)
  • ECM
Come on DTC Stored
P0121  Throttle / Pedal Position Sensor / Switch "A" Circuit Range / Performance Problem
  • Throttle position sensor (built in throttle body)
Come on DTC Stored
P0122  Throttle / Pedal Position Sensor / Switch "A" Circuit Low Input
  • Throttle position sensor
  • Open in VTA1 circuit
  • Open in VC circuit (when the VC circuit is open, DTCs P0222 and P2135 are also output simultaneously)
  • ECM
Come on DTC Stored
P0123  Throttle / Pedal Position Sensor / Switch "A" Circuit High Input
  • Throttle position sensor (built in throttle body)
  • Open in VTA circuit
  • Open in E2 circuit
  • VC and VTA circuits are short-circuited
  • ECM
Come on DTC Stored
P0125  Insufficient Coolant Temperature for Closed Loop Fuel Control
  • Cooling system
  • Engine coolant temperature sensor
  • Thermostat
Come on DTC Stored
P0128  Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)
  • Thermostat
  • Cooling system
  • Engine coolant temperature sensor
  • ECM
Come on DTC Stored
P0136  Oxygen Sensor Circuit Malfunction (Bank 1 Sensor 2)
  • Heated oxygen sensor (bank 1 sensor 2) circuit
  • Heated oxygen sensor (bank 1 sensor 2)
  • Heated oxygen sensor heater (bank 1 sensor 2)
  • A/F sensor (bank 1 sensor 1)
  • A/F sensor heater
Come on DTC Stored
P0137  Oxygen Sensor Circuit Low Voltage (Bank 1 Sensor 2)
  • Heated oxygen sensor (bank 1 sensor 2) circuit
  • Heated oxygen sensor (bank 1 sensor 2)
  • Heated oxygen sensor heater (bank 1 sensor 2)
  • A/F sensor (bank 1 sensor 1)
  • A/F sensor heater
Come on DTC Stored
P0138  Oxygen Sensor Circuit High Voltage (Bank 1 Sensor 2)
  • Heated oxygen sensor (bank 1 sensor 2) circuit
  • Heated oxygen sensor (bank 1 sensor 2)
  • Heated oxygen sensor heater (bank 1 sensor 2)
  • A/F sensor (bank 1 sensor 1)
  • A/F sensor heater
Come on DTC Stored
P0171  System Too Lean (Fuel Trim)
  • Air induction system
  • Injector has blockage
  • Mass air flow meter
  • Engine coolant temperature sensor
  • Fuel pressure
  • Gas leakage in exhaust system
  • Open or short in A/F sensor (bank 1 sensor 1) circuit
  • A/F sensor (bank 1 sensor 1)
  • A/F sensor heater (bank 1 sensor 1)
  • EFI M relay (integration relay)
  • PCV valve and hose
  • PCV hose connection
  • ECM
Come on DTC Stored
P0172  System Too Rich (Bank 1)
  • Injector has leakage or blockage
  • Mass air flow meter
  • Engine coolant temperature sensor
  • Ignition system
  • Fuel pressure
  • Gas leakage in exhaust system
  • Open or short in A/F sensor (bank 1 sensor 1) circuit
  • A/F sensor (bank 1 sensor 1)
  • A/F sensor heater (bank 1 sensor 1)
  • EFI M relay (integration relay)
  • ECM
Come on DTC Stored
P0220  Throttle / Pedal Position Sensor / Switch "B" Circuit
  • Open or short in throttle position sensor circuit
  • Throttle position sensor
  • ECM
Come on DTC Stored
P0222  Throttle / Pedal Position Sensor / Switch "B" Circuit Low Input
  • Throttle position sensor
  • Open in VTA2 circuit
  • Open in VC circuit (when the VC circuit is open, DTCs P0122 and P2135 are also output simultaneously)
Come on DTC Stored
P0223  Throttle / Pedal Position Sensor / Switch "B" Circuit High Input
  • Throttle position sensor
Come on DTC Stored
P0300  Random / Multiple Cylinder Misfire Detected
  • Open or short in engine wire harness
  • Connector connection
  • Vacuum hose connection
  • Ignition system
  • Injector
  • Fuel pressure
  • Mass air flow meter
  • Engine coolant temperature sensor
  • Compression pressure
  • Valve clearance
  • Valve timing
  • PCV hose connection
  • PCV hose
  • ECM
Comes on/Blink DTC Stored
P0301  Cylinder 1 Misfire Detected
  • Same as DTC P0300
Comes on/Blink DTC Stored
P0302  Cylinder 2 Misfire Detected
  • Same as DTC P0300
Comes on/Blink DTC Stored
P0303  Cylinder 3 Misfire Detected
  • Same as DTC P0300
Comes on/Blink DTC Stored
P0304  Cylinder 4 Misfire Detected
  • Same as DTC P0300
Comes on/Blink DTC Stored
P0325  Knock Sensor 1 Circuit
  • Open or short in knock sensor circuit
  • Knock sensor (looseness)
  • ECM
Come on DTC Stored
P0327  Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor)
  • Short in knock sensor circuit
  • Knock sensor
  • ECM
Come on DTC Stored
P0328  Knock Sensor 1 Circuit High Input (Bank 1 or Single Sensor)
  • Open in knock sensor circuit
  • Knock sensor
  • ECM
Come on DTC Stored
P0335  Crankshaft Position Sensor "A" Circuit
  • Open or short in crankshaft position sensor circuit
  • Crankshaft position sensor
  • Signal plate (crankshaft)
  • ECM
Come on DTC Stored
P0340  Camshaft Position Sensor Circuit Malfunction
  • Open or short in camshaft position sensor circuit
  • Camshaft position sensor
  • Camshaft timing pulley
  • Timing chain has jumped a tooth
  • ECM
Come on DTC Stored
P0341  Camshaft Position Sensor "A" Circuit Range / Performance (Bank 1 or Single Sensor)
  • Same as DTC P0340
Come on DTC Stored
P0351  Ignition Coil "A" Primary / Secondary Circuit
  • Ignition system
  • Open or short in IGF or IGT1 circuit between ignition coil with igniter and ECM
  • No.1 ignition coil with igniter
  • ECM
Come on DTC Stored
P0352  Ignition Coil "B" Primary / Secondary Circuit
  • Ignition system
  • Open or short in IGF or IGT2 circuit between ignition coil with igniter and ECM
  • No.2 ignition coil with igniter
  • ECM
Come on DTC Stored
P0353  Ignition Coil "C" Primary / Secondary Circuit
  • Ignition system
  • Open or short in IGF or IGT3 circuit between ignition coil with igniter and ECM
  • No.3 ignition coil with igniter
  • ECM
Come on DTC Stored
P0354  Ignition Coil "D" Primary / Secondary Circuit
  • Ignition system
  • Open or short in IGF or IGT4 circuit between ignition coil with igniter and ECM
  • No.4 ignition coil with igniter
  • ECM
Come on DTC Stored
P0420  Catalyst System Efficiency Below Threshold (Bank 1)
  • Gas leakage in exhaust system
  • A/F sensor (bank 1 sensor 1)
  • Heated oxygen sensor (bank 1 sensor 2)
  • Three-way catalytic converter (exhaust manifold)
Come on DTC Stored
P043E  Evaporative Emission System Reference Orifice Clog Up
  • Canister pump module (Reference orifice, leak detection pump, vent valve)
  • Connector/wire harness (Canister pump module - ECM)
  • EVAP system hose (pipe from air inlet port to canister pump module, canister filter, fuel tank vent hose)
  • ECM
Come on DTC Stored
P043F  Evaporative Emission System Reference Orifice High Flow
  • Same as DTC P043E
Come on DTC Stored
P0441  Evaporative Emission Control System Incorrect Purge Flow
  • Purge VSV
  • Connector/wire harness (Purge VSV - ECM)
  • Canister pump module
  • Leakage from EVAP system
  • Leakage from EVAP line (Purge VSV - Intake manifold)
  • ECM
Come on DTC Stored
P0446  Evaporative Emission Control System Vent Control Circuit
  • Pressure switching valve
  • EVAP line (Pressure switching valve - Fuel tank)
  • ECM
Come on DTC Stored
P0450  Evaporative Emission Control System Pressure Sensor Malfunction
  • Canister pump module
  • EVAP system hose (pipe from air inlet port to canister pump module, canister filter, fuel tank vent hose)
  • Connector/wire harness (Canister pump module - ECM)
  • ECM
Come on DTC Stored
P0451  Evaporative Emission Control System Pressure Sensor Range / Performance
  • Canister pump module
  • EVAP system hose (pipe from air inlet port to canister pump module, canister filter, fuel tank vent hose)
  • ECM
Come on DTC Stored
P0452  Evaporative Emission Control System Pressure Sensor / Switch Low Input
  • Same as DTC P0450
Come on DTC Stored
P0453  Evaporative Emission Control System Pressure Sensor / Switch High Input
  • Same as DTC P0450
Come on DTC Stored
P0455  Evaporative Emission Control System Leak Detected (Gross Leak)
  • Fuel cap (loose)
  • Leakage from EVAP line (Canister - Fuel tank)
  • Leakage from EVAP line (Purge VSV - Canister)
  • Canister pump module
  • Leakage from fuel tank
  • Leakage from canister
Come on DTC Stored
P0456  Evaporative Emission Control System Leak Detected (Very Small Leak)
  • Same as DTC P0455
Come on DTC Stored
P0505  Idle Control System Malfunction
  • Open or short in idle speed control (ISC) valve circuit
  • Idle speed control (ISC) valve has stuck closed
  • ECM
  • Air induction system
  • PCV valve and hose
Come on DTC Stored
P0560  System Voltage
  • Open in back up power source circuit
  • ECM
Come on DTC Stored
P0604  Internal Control Module Random Access Memory (RAM) Error
  • ECM
Come on DTC Stored
P0606  ECM / PCM Processor
  • ECM
Come on -
P0607  Control Module Performance
  • ECM
Come on DTC Stored
P0657  Actuator Supply Voltage Circuit / Open
  • ECM
Come on DTC Stored
P1115  Coolant Temperature Sensor Circuit for Coolant Heat Storage System
  • Coolant heat storage tank outlet temperature sensor
  • Open or short in temperature sensor circuit
  • ECM
Come on DTC Stored
P1116  Coolant Temperature Sensor Circuit Stack for Coolant Heat Storage
  • Coolant heat storage tank outlet temperature sensor
  • Cooling system (clogging)
Come on DTC Stored
P1117  Coolant Temperature Sensor Circuit Low for Coolant Heat Storage
  • Coolant heat storage tank outlet temperature sensor
  • Short in temperature sensor circuit
  • ECM
Come on DTC Stored
P1118  Coolant Temperature Sensor Circuit High for Coolant Heat Storage
  • Coolant heat storage tank outlet temperature sensor
  • Open in temperature sensor circuit
  • ECM
Come on DTC Stored
P1120  Coolant Flow Control Valve Position Sensor Circuit
  • Open or short in water valve position sensor circuit
  • Water valve (coolant flow control valve)
  • ECM
Come on DTC Stored
P1121  Coolant Flow Control Valve Position Sensor Circuit Stuck
  • Water valve (coolant flow control valve)
  • Cooling system (clogging)
Come on DTC Stored
P1122  Coolant Flow Control Valve Position Sensor Circuit Low
  • Water valve (coolant flow control valve)
  • Short in WBAD (valve position signal) circuit
  • Open in VC circuit
  • ECM
Come on DTC Stored
P1123  Coolant Flow Control Valve Position Sensor Circuit High
  • Water valve (coolant flow control valve)
  • Open in E2 circuit
  • VC and WBAD circuits are short-circuited
  • Open in WBAD circuit
  • ECM
Come on DTC Stored
P1150  Coolant Path Clog of Coolant Heat Storage System
  • Coolant heat storage tank outlet temperature sensor
  • Water valve (coolant flow control valve)
  • Cooling system (clogging)
  • Heat storage tank
  • ECM
Come on DTC Stored
P1151  Coolant Heat Storage Tank
  • Heat storage tank
Come on DTC Stored
P1450  Fuel Tank Pressure Sensor
  • Fuel tank pressure sensor
  • Connector/wire harness (Fuel tank pressure sensor - ECM)
  • ECM
Come on DTC Stored
P1451  Fuel Tank Pressure Sensor Range/ Performance
  • Fuel tank pressure sensor
  • ECM
Come on DTC Stored
P1452  Fuel Tank Pressure Sensor Low Input
  • Fuel tank pressure sensor
  • Connector/wire harness (Fuel tank pressure sensor - ECM)
  • ECM
Come on DTC Stored
P1453  Fuel Tank Pressure Sensor High Input
  • Fuel tank pressure sensor
  • Connector/wire harness (Fuel tank pressure sensor - ECM)
  • ECM
Come on DTC Stored
P1455  Vapor Reducing Fuel Tank System Malfunction
  • Fuel Tank
Come on DTC Stored
P2102  Throttle Actuator Control Motor Circuit Low
  • Open or short in throttle control motor circuit
  • Throttle control motor
  • ECM
Come on DTC Stored
P2103  Throttle Actuator Control Motor Circuit High
  • Short in throttle control motor circuit
  • Throttle control motor
  • Throttle valve
  • Throttle body assembly
  • ECM
Come on DTC Stored
P2111  Throttle Actuator Control System - Stuck Open
  • Throttle control motor circuit
  • Throttle control motor
  • Throttle body
  • Throttle valve
Come on DTC Stored
P2112  Throttle Actuator Control System - Stuck Closed
  • Throttle control motor circuit
  • Throttle control motor
  • Throttle body
  • Throttle valve
Come on DTC Stored
P2118  Throttle Actuator Control Motor Current Range / Performance
  • Open in ETCS power source circuit
  • ETCS fuse
  • ECM
Come on DTC Stored
P2119  Throttle Actuator Control Throttle Body Range / Performance
  • Electric throttle control system
  • ECM
Come on DTC Stored
P2135  Throttle / Pedal Position Sensor / Switch "A" / "B" Voltage Correlation
  • VTA and VTA2 circuits are short-circuited
  • Open in VC circuit
  • Throttle position sensor
Come on DTC Stored
P2195  Oxygen (A/F) Sensor Signal Stuck Lean (Bank 1 Sensor 1)
  • Open or short in A/F sensor (bank 1 sensor 1) circuit
  • A/F sensor (bank 1 sensor 1)
  • A/F sensor heater
  • Integration relay
  • A/F sensor heater and relay circuit
  • Air induction system
  • Fuel pressure
  • Injector
  • PCV hose connection
  • ECM
Come on DTC Stored
P2196  Oxygen (A/F) Sensor Signal Stuck Rich (Bank 1 Sensor 1)
  • Same as DTC P2195
Come on DTC Stored
P2238  Oxygen (A/F) Sensor Pumping Current Circuit Low (Bank 1 Sensor 1)
  • Open or short in A/F sensor (bank 1 sensor 1)
  • A/F sensor (bank 1 sensor 1)
  • A/F sensor heater
  • EFI M relay (integration relay)
  • A/F sensor heater and relay circuit
  • ECM
Come on DTC Stored
P2239  Oxygen (A/F) Sensor Pumping Current Circuit High (Bank 1 Sensor 1)
  • Same as DTC P2238
Come on DTC Stored
P2252  Oxygen (A/F) Sensor Reference Ground Circuit Low (Bank 1 Sensor 1)
  • Same as DTC P2238
Come on DTC Stored
P2253  Oxygen (A/F) Sensor Reference Ground Circuit High (Bank 1 Sensor 1)
  • Same as DTC P2238
Come on DTC Stored
P2401  Evaporative Emission Leak Detection Pump Stuck OFF
  • Same as DTC P043E
Come on DTC Stored
P2402  Evaporative Emission Leak Detection Pump Stuck ON
  • Same as DTC P043E
Come on DTC Stored
P2419  Evaporative Emission Pressure Switching Valve Stuck ON
  • Same as DTC P043E
Come on DTC Stored
P2420  Evaporative Emission Pressure Switching Valve Stuck OFF
  • Pump module (0.02 inch orifice, vacuum pump, vent valve)
  • Connector / wire harness (Pump module - ECM)
  • ECM
Come on DTC Stored
P2601  Coolant Pump Control Circuit Range / Performance
  • CHS water pump
  • CHS water pump relay
  • Open or short in CHS water pump circuit
  • ECM
Come on DTC Stored
P2610  ECM / PCM Internal Engine Off Timer Performance
  • ECM
Come on DTC Stored
P2A00  A/F Sensor Circuit Slow Response (Bank 1 Sensor 1)
  • Open or short in A/F sensor (bank 1 sensor 1) circuit
  • A/F sensor (bank 1 sensor 1)
  • A/F sensor heater
  • EFI M relay (integration relay)
  • A/F sensor heater and relay circuit
  • Air induction system
  • Fuel pressure
  • Injector
  • PCV hose connection
  • ECM
Come on DTC Stored
P3190  Poor Engine Power
  • Air induction system
  • Throttle body
  • Fuel pressure
  • Engine
  • Air flow meter
  • Lack of fuel
  • Engine coolant temperature sensor
  • Crankshaft position sensor
  • Camshaft position sensor
  • ECM
Come on DTC Stored
P3191  Engine dose not Start
  • Air induction system
  • Throttle body
  • Fuel pressure
  • Engine
  • Air flow meter
  • Lack of fuel
  • Engine coolant temperature sensor
  • Crankshaft position sensor
  • Camshaft position sensor
  • ECM
Come on DTC Stored
P3193  Fuel Run Out
  • Lack of fuel
  • ECM
Come on DTC Stored
U0293  Lost Communication with HV ECU
  • Wire harness
  • HV ECU
  • ECM
Come on DTC Stored