Corolla 2006-2007

1.8L L4 VIN - Std 4

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Trouble Code: P0136



HO2S-12 (Bank 1 Sensor 2) Circuit Malfunction

Possible Causes:



HO2S signal circuit is open or shorted to ground
 
HO2S signal circuit shorted to VREF or system power (B+)
 
HO2S is damaged, contaminated or it has failed
 

Trouble Code: P0137



Oxygen Sensor Circuit Low Voltage (Bank 1 Sensor 2)

Possible Causes:



Open in HO2 sensor (sensor 2) circuit
 
HO2 sensor (sensor 2)
 
HO2 sensor heater (sensor 2)
 
EFI relay
 
Gas leakage from exhaust system
 

Trouble Code: P0138



Oxygen Sensor Circuit High Voltage (Bank 1 Sensor 2)

Possible Causes:



Short in HO2 sensor (sensor 2) circuit
 
HO2 sensor (sensor 2)
 
ECM internal circuit malfunction
 

Trouble Code: P0141



HO2S-12 (Bank 1 Sensor 2) Heater Circuit Malfunction

Possible Causes:



HO2S heater control circuit is open, shorted to ground or power
 
HO2S heater power circuit is open (check power from the relay)
 
HO2S heater is damaged or has failed
 
PCM has failed
 

Trouble Code: P0171



Fuel System Too Lean (Bank 1)

Possible Causes:



A/FS or HO2S is contaminated, deteriorated or it has failed
 
Air leaks after the MAF sensor, or in the EGR or PCV system
 
Base engine "mechanical" fault affecting one or more cylinders
 
Exhaust leaks located in front of the A/FS or HO2S location
 
Fuel control sensor is out of calibration (i.e., ECT, IAT or MAP)
 
Fuel delivery system supplying too little fuel during cruise or idle periods (e.g., faulty fuel pump or dirty, restricted fuel filter)
 
Fuel injector (one or more) dirty or pressure regulator has failed
 
Vehicle driven low on fuel or until it ran out of fuel
 

Trouble Code: P0172



Fuel System Too Rich (Bank 1)

Possible Causes:



A/FS or HO2S is contaminated, deteriorated or it has failed
 
Base engine "mechanical" fault affecting one or more cylinders
 
EVAP system component has failed or canister fuel saturated
 
Exhaust leaks located in front of the A/FS or HO2S location
 
Fuel control sensor is out of calibration (i.e., ECT, IAT or MAF)
 
Fuel delivery system supplying too much fuel during cruise or idle periods (e.g., faulty fuel pump, or faulty pressure regulator)
 
Fuel injector(s) is leaking or stuck partially open (one or more)
 

Trouble Code: P0220



Throttle / Pedal Position Sensor / Switch "B" Circuit

Possible Causes:



Throttle position sensor (built into throttle body)
 
ECM
 

Trouble Code: P0222



Throttle / Pedal Position Sensor / Switch "B" Circuit Low Input

Possible Causes:



TP sensor (built into throttle body)
 
Short in VTA2 circuit
 
Open in VC circuit
 
ECM
 

Trouble Code: P0223



Throttle / Pedal Position Sensor / Switch "B" Circuit High Input

Possible Causes:



Throttle position sensor (built into throttle body)
 
Open in VTA2 circuit
 
Open in E2 circuit
 
Short between VC and VTA2 circuits
 
ECM
 

Trouble Code: P0300



Multiple Cylinder Misfire Detected

Possible Causes:



Air leak in the intake manifold, or in the EGR or PCV system
 
Base engine mechanical fault that affects two or more cylinders
 
EGR valve is stuck open or the PCV system has a vacuum leak
 
Fuel delivery component fault that affects two or more cylinders (e.g., contaminated, dirty or sticking fuel injectors)
 
Ignition system fault (coil or plug) that affects several cylinders
 
Mass airflow meter is contaminated, or its signal is out of range
 

Trouble Code: P0301



Cylinder 1 Misfire Detected

Possible Causes:



Base engine mechanical fault that affects only Cylinder 1
 
EGR valve is stuck open or the PCV system has a vacuum leak
 
Fuel component fault that affects only Cylinder 1 (a contaminated or sticking injector)
 
Ignition system problem (coil or plug) that affects Cylinder 1
 

Trouble Code: P0302



Cylinder 2 Misfire Detected

Possible Causes:



Base engine mechanical fault that affects only Cylinder 2
 
EGR valve is stuck open or the PCV system has a vacuum leak
 
Fuel component fault that affects only Cylinder 2 (a contaminated or sticking injector)
 
Ignition system problem (coil or plug) that affects Cylinder 2
 

Trouble Code: P0303



Cylinder 3 Misfire Detected

Possible Causes:



Base engine mechanical fault that affects only Cylinder 3
 
EGR valve is stuck open or the PCV system has a vacuum leak
 
Fuel component fault that affects only Cylinder 3 (a contaminated or sticking injector)
 
Ignition system problem (coil or plug) that affects Cylinder 3
 

Trouble Code: P0304



Cylinder 4 Misfire Detected

Possible Causes:



Base engine mechanical fault that affects only Cylinder 4
 
EGR valve is stuck open or the PCV system has a vacuum leak
 
Fuel component fault that affects only Cylinder 4 (a contaminated or sticking injector)
 
Ignition system problem (coil or plug) that affects Cylinder 4
 

Trouble Code: P0325



Knock Sensor 1 Circuit Malfunction

Possible Causes:



Knock sensor signal circuit is open or shorted to ground
 
Knock sensor signal circuit is shorted to VREF or system power
 
Knock sensor is damaged, not tightened properly or has failed
 
PCM has failed
 

Trouble Code: P0327



KNOCK SENSOR 1 CIRCUIT LOW INPUT (BANK 1 OR SINGLE SENSOR)

Possible Causes:



Short in knock sensor circuit
 
Knock sensor
 
ECM
 

Trouble Code: P0327



Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor)

Possible Causes:



Short in knock sensor circuit
 
Knock sensor
 
ECM
 

Trouble Code: P0328



KNOCK SENSOR 1 CIRCUIT HIGH INPUT (BANK 1 OR SINGLE SENSOR)

Possible Causes:



Open in knock sensor circuit
 
Knock sensor
 
ECM
 

Trouble Code: P0328



Knock Sensor 1 Circuit High Input (Bank 1 or Single Sensor)

Possible Causes:



Open in knock sensor circuit
 
Knock sensor
 
ECM
 

Trouble Code: P0335



Crankshaft Position Sensor 'A' Circuit Malfunction

Possible Causes:



CKP Sensor 'A' signal circuit is open, shorted to ground or shorted to system power
 
CKP Sensor 'A' signal ground circuit is open
 
CKP Sensor 'A' is damaged or has failed
 

Trouble Code: P0339



Crankshaft Position Sensor "A" Circuit Intermittent

Possible Causes:



Open or short in CKP sensor circuit
 
CKP sensor
 
Sensor plate (CKP sensor plate)
 
ECM
 

Trouble Code: P0340



Camshaft Position Sensor Circuit Malfunction

Possible Causes:



CMP sensor signal circuit is open, shorted to ground or power
 
CMP sensor signal ground circuit is open
 
CMP sensor has failed, or the PCM has failed
 

Trouble Code: P0341



Camshaft Position Sensor 'A' Signal Range/Performance

Possible Causes:



CMP sensor signal circuit is open, shorted to ground or power
 
CMP sensor pulley is damaged, or timing belt has jumped teeth
 
CMP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0351



Ignition Coil "A" Primary / Secondary Circuit

Possible Causes:



Ignition system
 
Open or short in IGF or IGT circuit (1 to 4) between ignition coil with igniter and ECM
 
No. 1 to No. 4 ignition coils with igniters
 
ECM
 

Trouble Code: P0351



Ignition Coil "A" Primary / Secondary Circuit

Possible Causes:



Ignition system
 
Open or short in IGF1 or IGT1 circuit between ignition coil and ECM
 
No. 1 ignition coil
 
ECM
 

Trouble Code: P0352



Ignition Coil "B" Primary / Secondary Circuit

Possible Causes:



Ignition system
 
Open or short in IGF or IGT circuit (1 to 4) between ignition coil with igniter and ECM
 
No. 1 to No. 4 ignition coils with igniters
 
ECM
 

Trouble Code: P0352



Ignition Coil "B" Primary / Secondary Circuit

Possible Causes:



Ignition system
 
Open or short in IGF1 or IGT2 circuit between ignition coil and ECM
 
No. 2 ignition coil
 
ECM
 

Trouble Code: P0353



Ignition Coil "C" Primary / Secondary Circuit

Possible Causes:



Ignition system
 
Open or short in IGF or IGT circuit (1 to 4) between ignition coil with igniter and ECM
 
No. 1 to No. 4 ignition coils with igniters
 
ECM
 

Trouble Code: P0353



Ignition Coil "C" Primary / Secondary Circuit

Possible Causes:



Ignition system
 
Open or short in IGF1 or IGT3 circuit between ignition coil and ECM
 
No. 3 ignition coil
 
ECM
 

Trouble Code: P0354



Ignition Coil "D" Primary / Secondary Circuit

Possible Causes:



Ignition system
 
Open or short in IGF or IGT circuit (1 to 4) between ignition coil with igniter and ECM
 
No. 1 to No. 4 ignition coils with igniters
 
ECM
 

Trouble Code: P0354



Ignition Coil "D" Primary / Secondary Circuit

Possible Causes:



Ignition system
 
Open or short in IGF1 or IGT4 circuit between ignition coil and ECM
 
No. 4 ignition coil
 
ECM
 

Trouble Code: P0420



Catalyst Efficiency Below Normal (Bank 1)

Possible Causes:



Catalytic converter is damaged, contaminated or has failed
 
Front A/FS or rear HO2S is contaminated with fuel or moisture
 
Front A/FS or the rear HO2S is loose in its mounting hole
 
Front A/FS is older (aged) than the rear HO2S (HO2S is lazy)
 
Gas leaks at the exhaust manifold or in the exhaust pipes
 

Trouble Code: P043E



Evaporative Emission System Reference Orifice Clog Up

Possible Causes:



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
 

Trouble Code: P043F



Evaporative Emission System Reference Orifice High Flow

Possible Causes:



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
 

Trouble Code: P0440



EVAP Control System Large Leak (0.080") Detected

Possible Causes:



Charcoal canister is clogged, loaded with fuel or with moisture
 
Fuel filler cap missing, loose (not tightened) or the wrong part
 
Fuel tank over-fill check valve cracked or damaged
 
Fuel tank seal leaking, fuel tank cracked or damaged/leaking
 
Fuel vapor hoses/tubes blocked or restricted, or fuel vapor control valve tube or fuel vapor vent valve assembly blocked
 
Vacuum hose or tubing cracked, damaged or disconnected
 
Vapor Pressure sensor incorrectly instAlled
 
PCM has failed
 

Trouble Code: P0441



EVAP System Incorrect Purge Flow Detected

Possible Causes:



Charcoal canister is clogged, loaded with fuel or with moisture
 
Fuel tank over-fill check valve cracked or damaged
 
Fuel tank seal leaking, fuel tank cracked or damaged/leaking
 
Fuel vapor hoses/tubes blocked or restricted, or fuel vapor control valve tube or fuel vapor vent valve assembly blocked
 
Vacuum hose or tubing cracked, damaged or disconnected
 
Vapor pressure sensor is damaged or has failed
 
VSV circuit for the canister purge, VSV for the CCV or the VSV for the pressure switching valve is open or shorted to ground
 
VSV for the vapor pressure sensor circuit is open or shorted to ground, or the vapor pressure sensor is damaged or has failed
 

Trouble Code: P0442



EVAP System SmAll Leak (0.040") Detected

Possible Causes:



Canister Purge valve is damaged, leaking or has failed
 
Charcoal canister is loaded with fuel or moisture
 
Fuel filler cap loose, cross-threaded, incorrect part or damaged
 
Fuel tank is cracked (leaking), or a leak exists in the 'O' ring
 
Fuel tank pressure sensor is damaged or has failed
 
Fuel vapor line(s), fuel pipes or hoses damaged or leaking
 
PCM has failed
 

Trouble Code: P0442



EVAP Vent Control Solenoid Circuit Malfunction

Possible Causes:



Charcoal canister is clogged, loaded with fuel or with moisture
 
Fuel tank over-fill check valve cracked or damaged
 
Fuel tank seal leaking, fuel tank cracked, damaged or leaking
 
Fuel vapor hoses/tubes blocked or restricted, or fuel vapor control valve tube or fuel vapor vent valve assembly blocked
 
Vacuum hose or tubing cracked, damaged or disconnected
 
Vapor pressure sensor is damaged or has failed
 
VSV circuit for the canister purge, VSV for the CCV or the VSV for the pressure switching valve is open or shorted to ground
 
VSV for the vapor pressure sensor circuit is open or shorted to ground, or the vapor pressure sensor is damaged or has failed
 

Trouble Code: P0450



EVAP Vapor Pressure Sensor Circuit Malfunction

Possible Causes:



Vapor pressure sensor signal circuit open or shorted to ground
 
Vapor pressure sensor ground circuit is open
 
Vapor pressure sensor power circuit is open
 
Vapor pressure sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0451



EVAP Vapor Pressure Sensor Range/Performance

Possible Causes:



Vapor pressure sensor vacuum hoses loose or damaged
 
Vapor pressure sensor is damaged or has failed
 
PCM has failed
 

 
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