DIAGNOSTIC TROUBLE CODE CHART HINT: Parameters Listed in the Chart May Not Be Exactly the Same As Your Readings Due to the Type of Instrument Or Other Factors

05–55 DIAGNOSTICS – SFI SYSTEM

05284–29 DIAGNOSTIC TROUBLE CODE CHART HINT: Parameters listed in the chart may not be exactly the same as your readings due to the type of instrument or other factors. If a malfunction code is displayed during the DTC check in check mode, check the circuit for the codes listed in the table below. For details of each code, refer to ’’See Page’’ under the respective ’’DTC No.’’ in the this chart.

DTC No. Detection Item Trouble Area MIL*1 Memory (See Page) S Open or short in oil control valve circuit P0010 Camshaft Position ”A” Actuator S Oil control valve f f (05–63) Circuit (Bank 1) S ECM S Valve timing Camshaft Position ”A” –Timing P0011 S Oil control valve Over–Advanced or System Per- f f (05–69) S Camshaft timing gear assembly formance (Bank 1) S ECM P0012 Camshaft Position ”A” –Timing S Same as DTC P0011 f f (05–69) Over– Retarded (Bank 1) Crankshaft Position – Camshaft S Mechanical system (Timing chain has jumped a tooth, chain P0016 Position Correlation (Bank 1 stretched) f f (05–77) Sensor A) S ECM S Open or short in heater circuit of A/F sensor Oxygen (A/F) Sensor Heater P0031 S A/F sensor heater Control Circuit Low (Bank 1 Sen- f f (05–79) S EFI M relay (Integration relay) sor 1) S ECM S Short in heater circuit of A/F sensor Oxygen (A/F) Sensor Heater P0032 S A/F sensor heater Control Circuit High (Bank 1 f f (05–79) S EFI M relay (Integration relay) Sensor 1) S ECM S Open or short in heater circuit of the heated oxygen sensor P0037 Oxygen Sensor Heater Control S Heated oxygen sensor heater f f (05–84) Circuit Low (Bank 1 Sensor 2) S EFI M relay (integration relay) S ECM S Short in heater circuit of the heated oxygen sensor P0038 Oxygen Sensor Heater Control S Heated oxygen sensor heater f f (05–84) Circuit High (Bank 1 Sensor 2) S EFI M relay (integration relay) S ECM S Open or short in mass air flow meter circuit P0100 Mass or Volume Air Flow Circuit S Mass air flow meter f f (05–89) S ECM P0101 Mass or Volume Air Flow Circuit S Mass air flow meter f f (05–96) Range/Performance Problem S Open in mass air flow meter circuit P0102 Mass or Volume Air Flow Circuit S Mass air flow meter f f (05–89) Low Input S ECM S Short in mass air flow meter circuit P0103 Mass or Volume Air Flow Circuit S Mass air flow meter f f (05–89) High Input S ECM S Open or short in intake air temperature sensor circuit P0110 Intake Air Temperature Circuit S Intake air temperature sensor (built in mass air flow meter) f f (05–98) S ECM S Short in intake air temperature sensor circuit P0112 Intake Air Temperature Circuit S Intake air temperature sensor (built in mass air flow meter) f f (05–98) Low Input S ECM S Open in intake air temperature sensor circuit P0113 Intake Air Temperature Circuit S Intake air temperature sensor (built in mass air flow meter) f f (05–98) High Input S ECM

2004 Prius – Preliminary Release (RM1075U)

AuthorĂ: DateĂ: 219 05–56 DIAGNOSTICS – SFI SYSTEM

DTC No. Detection Item Trouble Area MIL*1 Memory (See Page) S Open or short in engine coolant temperature sensor circuit P0115 Engine Coolant Temperature Cir- S Engine coolant temperature sensor f f (05–103) cuit S ECM Engine Coolant Temperature Cir- P0116 cuit Range/Performance Prob- S Engine coolant temperature sensor f f (05–108) lem S Short in engine coolant temperature sensor circuit P0117 Engine Coolant Temperature Cir- S Engine coolant temperature sensor f f (05–103) cuit Low Input S ECM S Open in engine coolant temperature sensor circuit P0118 Engine Coolant Temperature Cir- S Engine coolant temperature sensor f f (05–103) cuit High Input S ECM S Open or short in throttle position sensor circuit P0120 Throttle/Pedal Position Sensor/ S Throttle position sensor (built in throttle body) f f (05–110) Switch ”A” Circuit S ECM Throttle/Pedal Position Sensor/ P0121 Switch ”A” Circuit Range/Perfor- S Throttle position sensor (built in throttle body) f f (05–117) mance Problem S Throttle position sensor S Open in VTA1 circuit P0122 Throttle/Pedal Position Sensor/ S Open in VC circuit (when the VC circuit is open, DTCs P0222 f f (05–110) Switch ”A” Circuit Low Input and P2135 are also output simultaneously) S ECM S Throttle position sensor (built in throttle body) S Open in VTA circuit P0123 Throttle/Pedal Position Sensor/ S Open in E2 circuit f f (05–110) Switch ”A” Circuit High Input S VC and VTA circuits are short–circuited S ECM S Cooling system P0125 Insufficient Coolant Temperature S Engine coolant temperature sensor f f (05–119) for Closed Loop Fuel Control S Thermostat S Thermostat Coolant Thermostat (Coolant P0128 S Cooling system Temperature Below Thermostat f f (05–122) S Engine coolant temperature sensor Regulating Temperature) S ECM P0136 Oxygen Sensor Circuit Malfunc- S Heated oxygen sensor f f (05–125) tion (Bank 1 sensor 2) S Open or short in heated oxygen sensor circuit P0137 Oxygen Sensor Circuit Low Volt- S Heated oxygen sensor f f (05–125) age (Bank 1 Sensor 2) S Heated oxygen sensor heater S EFI M relay (integration relay) P0138 Oxygen Sensor Circuit High Volt- S Short in heated oxygen sensor circuit f f (05–125) age (Bank 1 Sensor 2) S Heated oxygen sensor S Air induction system S Injector has blockage S Mass air flow meter S Engine coolant temperature sensor S Fuel pressure S Gas leakage in exhaust system P0171 System Too Lean (Bank 1) S Open or short in A/F sensor (bank 1 sensor 1) circuit f f (05–143) S A/F sensor (bank 1 sensor 1) S A/F sensor heater (bank 1 sensor 1) S EFI M relay (integration relay) S PCV valve and hose S PCV hose connection S ECM

2004 Prius – Preliminary Release (RM1075U)

AuthorĂ: DateĂ: 220 05–57 DIAGNOSTICS – SFI SYSTEM

DTC No. Detection Item Trouble Area MIL*1 Memory (See Page) S Injector has leakage or blockage S Mass air flow meter S Engine coolant temperature sensor S Ignition system S Fuel pressure P0172 System Too Rich (Bank 1) S Gas leakage in exhaust system f f (05–143) S Open or short in A/F sensor (bank 1 sensor 1) circuit S A/F sensor (bank 1 sensor 1) S A/F sensor heater (bank 1 sensor 1) S EFI M relay (integration relay) S ECM S Open or short in throttle position sensor circuit P0220 Throttle/Pedal Position Sensor/ S Throttle position sensor f f (05–110) Switch ”B” Circuit S ECM S Throttle position sensor P0222 Throttle/Pedal Position Sensor/ S Open in VTA2 circuit f f (05–110) Switch ”B” Circuit Low Input S Open in VC circuit (when the VC circuit is open, DTCs P0122 and P2135 are also output simultaneously) P0223 Throttle/Pedal Position Sensor/ S Throttle position sensor f f (05–110) Switch ”B” Circuit High Input S Open or short in engine wire harness S Connector connection S Vacuum hose connection S Ignition system S Injector S Fuel pressure P0300 Random/Multiple Cylinder Misfire S Mass air flow meter f*2 f (05–157) Detected S Engine coolant temperature sensor S Compression pressure S Valve clearance S Valve timing S PCV hose connection S PCV hose S ECM P0301 Cylinder 1 Misfire Detected S Same as DTC P0300 f*2 f (05–157) P0302 Cylinder 2 Misfire Detected S Same as DTC P0300 f*2 f (05–157) P0303 Cylinder 3 Misfire Detected S Same as DTC P0300 f*2 f (05–157) P0304 Cylinder 4 Misfire Detected S Same as DTC P0300 f*2 f (05–157) S Open or short in knock sensor circuit P0325 Knock Sensor 1 Circuit (Bank 1 S Knock sensor (looseness) f f (05–172) or Single Sensor) S ECM S Short in knock sensor circuit P0327 Knock Sensor 1 Circuit Low In- S Knock sensor f f (05–172) put (Bank 1 or Single Sensor) S ECM S Open in knock sensor circuit P0328 Knock Sensor 1 Circuit High In- S Knock sensor f f (05–172) put (Bank 1 or Single Sensor) S ECM S Open or short in crankshaft position sensor circuit P0335 Crankshaft Position Sensor ”A” S Crankshaft position sensor f f (05–177) Circuit S Signal plate (crankshaft) S ECM

2004 Prius – Preliminary Release (RM1075U)

AuthorĂ: DateĂ: 221 05–58 DIAGNOSTICS – SFI SYSTEM

DTC No. Detection Item Trouble Area MIL*1 Memory (See Page) S Open or short in camshaft position sensor circuit S Camshaft position sensor P0340 Camshaft Position Sensor ”A” S Camshaft timing pulley f f (05–181) Circuit (Bank 1 or Single Sensor) S Timing chain has jumped a tooth S ECM Camshaft Position Sensor ”A” P0341 Circuit Range/Performance S Same as DTC P0340 f f (05–181) (Bank 1 or Single Sensor) S Ignition system S Open or short in IGF or IGT1 circuit between ignition coil with P0351 *3 Ignition Coil ”A” Primary/Second- igniter and ECM f f (05–185) ary Circuit S No.1 ignition coil with igniter S ECM S Ignition system S Open or short in IGF or IGT2 circuit between ignition coil with P0352 *3 Ignition Coil ”B” Primary/Second- igniter and ECM f f (05–185) ary Circuit S No.2 ignition coil with igniter S ECM S Ignition system S Open or short in IGF or IGT3 circuit between ignition coil with P0353 *3 Ignition Coil ”C” Primary/Second- igniter and ECM f f (05–185) ary Circuit S No.3 ignition coil with igniter S ECM S Ignition system S Open or short in IGF or IGT4 circuit between ignition coil with P0354 *3 Ignition Coil ”D” Primary/Second- igniter and ECM f f (05–185) ary Circuit S No.4 ignition coil with igniter S ECM S Gas leakage in exhaust system P0420 Catalyst System Efficiency Be- S A/F sensor (bank 1 sensor 1) f f (05–195) low Threshold (Bank 1) S Heated oxygen sensor (bank 1 sensor 2) S Three–way catalytic converter (Exhaust manifold) S Fuel tank cap is incorrectly installed S Fuel tank cap is cracked or damaged S Vacuum hose is cracked, blocked, damaged or disconnected ((1), (2), (3), (4), (5), (6) and (7) in Fig. 1) S Open or short in vapor pressure sensor circuit S Vapor pressure sensor S Open or short in VSV circuit for EVAP Evaporative Emission Control P0441 S VSV for EVAP System f f (05–202) S Open or short in VSV circuit for CCV Incorrect Purge Flow S VSV for CCV S Open or short in VSV circuit for pressure switching valve S VSV for pressure switching valve S Fuel tank is cracked or damaged S Charcoal canister is cracked or damaged S Fuel tank over fill check valve is cracked or damaged S ECM

2004 Prius – Preliminary Release (RM1075U)

AuthorĂ: DateĂ: 222 05–59 DIAGNOSTICS – SFI SYSTEM

DTC No. Detection Item Trouble Area MIL*1 Memory (See Page) S Fuel tank cap is incorrectly installed S Fuel tank cap is cracked or damaged S Vacuum hose cracks is blocked, damaged or disconnected ((1), (2), (3), (4), (5), (6) and (7) in Fig. 1 of the circuit descrip- tion) S Open or short in vapor pressure sensor circuit S Vapor pressure sensor Evaporative Emission Control S Open or short in VSV circuit for EVAP P0442 System Leak Detected (small S VSV for EVAP f f (05–231) leak) S Open or short in VSV circuit for CCV S VSV for CCV S Open or short in VSV circuit for pressure switching valve S VSV for pressure switching valve S Fuel tank is cracked or damaged S Charcoal canister is cracked or damaged S Fuel tank over fill check valve is cracked or damaged S ECM P0446 Evaporative Emission Control S Same as DTC P0441 f f (05–202) System Vent Control Circuit Evaporative Emission Control S Open or short in vapor pressure sensor circuit P0451 System Pressure Sensor/Switch S Vapor pressure sensor f f (05–255) Range/Performance S ECM Evaporative Emission Control P0452 System Pressure Sensor/Switch S Same as DTC P0451 f f (05–255) Low Input Evaporative Emission Control P0453 System Pressure Sensor/Switch S Same as DTC P0451 f f (05–255) High Input Evaporative Emission Control P0455 System Leak Detected (gross S Same as DTC P0442 (05–231) leak) Evaporative Emission Control P0456 System Leak Detected (very S Same as DTC P0442 f f (05–231) small leak) S Open or short in idle speed control (ISC) valve circuit S Idle speed control (ISC) valve has stuck closed P0505 Idle Air Control System S ECM f f (05–261) S Air induction system S PCV valve and hose P0560 S Open in back up power source circuit System Voltage f f (05–264) S ECM P0604 Internal Control Module Random S ECM f f (05–268) Access Memory (RAM) Error P0606 ECM/PCM Processor S ECM f  (05–268) P0607 Control Module Performance S ECM f f (05–268) P0657 Actuator Supply Voltage Circuit/ S ECM f f (05–268) Open Coolant Temperature Sensor Cir- S Coolant heat storage tank outlet temperature sensor P1115 cuit For Coolant Heat Storage S Open or short in temperature sensor circuit f f (05–270) System S ECM Coolant Temperature Sensor Cir- P1116 S Coolant heat storage tank outlet temperature sensor cuit Stuck For Coolant Heat Stor- f f (05–275) S Cooling system (clogging) age System Coolant Temperature Sensor Cir- S Coolant heat storage tank outlet temperature sensor P1117 cuit Low For Coolant Heat Stor- S Short in temperature sensor circuit f f (05–270) age System S ECM 2004 Prius – Preliminary Release (RM1075U)

AuthorĂ: DateĂ: 223 05–60 DIAGNOSTICS – SFI SYSTEM

DTC No. Detection Item Trouble Area MIL*1 Memory (See Page) Coolant Temperature Sensor Cir- S Coolant heat storage tank outlet temperature sensor P1118 cuit High For Coolant Heat Stor- S Open in temperature sensor circuit f f (05–270) age System S ECM S Open or short in water valve position sensor circuit P1120 Coolant Flow Control Valve Posi- S Water valve (Coolant flow control valve) f f (05–277) tion Sensor Circuit S ECM P1121 Coolant Flow Control Valve Posi- S Water valve (Coolant flow control valve) f f (05–284) tion Sensor Circuit Stuck S Cooling system (clogging) S Water valve (Coolant flow control valve) P1122 Coolant Flow Control Valve Posi- S Short in WBAD (valve position signal) circuit f f (05–277) tion Sensor Circuit Low S Open in VC circuit S ECM S Water valve (Coolant flow control valve) S Open in E2 circuit P1123 Coolant Flow Control Valve Posi- S VC and WBAD circuits are short–circuited f f (05–277) tion Sensor Circuit High S Open in WBAD circuit S ECM S Coolant heat storage tank outlet temperature sensor S Water valve (Coolant flow control valve) P1150 Coolant Path Clog Up For Cool- S Cooling system (clogging) f f (05–290) ant Heat Storage System S Heat storage tank S ECM P1151 Coolant Heat Storage Tank S Heat storage tank f f (05–297) P1455 Vapor Reducing Fuel Tank Sys- S Fuel Tank f f (05–299) tem Malfunction S Open or short in throttle control motor circuit P2102 Throttle Actuator Control Motor S Throttle control motor f f (05–301) Circuit Low S ECM S Short in throttle control motor circuit S Throttle control motor P2103 Throttle Actuator Control Motor S Throttle valve f f (05–301) Circuit High S Throttle body assembly S ECM S Throttle control motor circuit P2111 Throttle Actuator Control System S Throttle control motor f f (05–305) Stuck Open S Throttle body S Throttle valve S Throttle control motor circuit P2112 Throttle Actuator Control System S Throttle control motor f f (05–305) Stuck Closed S Throttle body S Throttle valve S Open in ETCS power source circuit P2118 Throttle Actuator Control Motor S ETCS fuse f f (05–308) Current Range/Performance S ECM P2119 Throttle Actuator Control Throttle S Electric throttle control system f f (05–312) Body Range/Performance S ECM Throttle/Pedal Position Sensor/ S VTA and VTA2 circuits are short–circuited P2135 Switch ”A”/”B” Voltage Correla- S Open in VC circuit f f (05–110) tion S Throttle position sensor

2004 Prius – Preliminary Release (RM1075U)

AuthorĂ: DateĂ: 224 05–61 DIAGNOSTICS – SFI SYSTEM

DTC No. Detection Item Trouble Area MIL*1 Memory (See Page) S Open or short in A/F sensor (bank 1 sensor 1) circuit S A/F sensor (bank 1 sensor 1) S A/F sensor heater S Integration relay P2195 Oxygen (A/F) Sensor Signal S A/F sensor heater and relay circuit f f (05–314) Stuck Lean (Bank 1 Sensor 1) S Air induction system S Fuel pressure S Injector S PCV hose connection S ECM P2196 Oxygen (A/F) Sensor Signal S Same as DTC P2195 f f (05–314) Stuck Rich (Bank 1 Sensor 1) S Open or short in A/F sensor (bank 1 sensor 1) S A/F sensor (bank 1 sensor 1) Oxygen Sensor Pumping Cur- P2238 S A/F sensor heater rent Circuit Low (for A/F sensor f f (05–327) S EFI M relay (integration relay) Bank 1 sensor 1) S A/F sensor heater and relay circuit S ECM Oxygen Sensor Pumping Cur- P2239 rent Circuit High (for A/F sensor S Same as DTC P2238 f f (05–327) Bank 1 sensor 1) Oxygen Sensor Reference P2252 Ground Circuit Low (for A/F sen- S Same as DTC P2238 f f (05–327) sor Bank 1 sensor1) Oxygen Sensor Reference P2253 Ground Circuit High (for A/F sen- S Same as DTC P2238 f f (05–327) sor Bank 1 sensor1) S CHS water pump P2601 Coolant Pump Control Circuit S CHS water pump relay f f (05–333) Range/Performance S Open or short in CHS water pump circuit S ECM P2610 ECM/PCM Internal Engine Off S ECM f f (05–344) Timer Performance S Open or short in A/F sensor (bank 1 sensor 1) circuit S A/F sensor (bank 1 sensor 1) S A/F sensor heater S EFI M relay (integration relay) P2A00 A/F Sensor Circuit Slow Re- S A/F sensor heater and relay circuit f f (05–345) sponse (Bank 1 Sensor 1) S Air induction system S Fuel pressure S Injector S PCV hose connection S ECM S Air induction system S Throttle body S Fuel pressure S Engine P3190 S Air flow meter Poor Engine Power f f (05–357) S Lack of fuel S Engine coolant temperature sensor S Crankshaft position sensor S Camshaft position sensor S ECM

2004 Prius – Preliminary Release (RM1075U)

AuthorĂ: DateĂ: 225 05–62 DIAGNOSTICS – SFI SYSTEM

DTC No. Detection Item Trouble Area MIL*1 Memory (See Page) S Air induction system S Throttle body S Fuel pressure S Engine P3191 S Air flow meter Engine Does Not Start f f (05–357) S Lack of fuel S Engine coolant temperature sensor S Crankshaft position sensor S Camshaft position sensor S ECM P3193 S Lack of fuel Fuel Run Out f f (05–357) S ECM S Wire harness U0293 Lost Communication With HV S HV ECU f f (05–364) ECU S ECM *1: ”f” ... MIL illuminates, ”” ... MIL does not illuminate. *2: MIL illuminates or blinks *3: This DTC indicates malfunction related to the primary circuit.

2004 Prius – Preliminary Release (RM1075U)

AuthorĂ: DateĂ: 226