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DTC No. (See Page) Detection Item Trouble Area MIL Memory: Diagnostics

This document provides diagnostic trouble codes (DTCs) for Toyota Corolla vehicles from April 2003. It lists various DTCs, the systems or components they correspond to, and whether the malfunction indicator light will illuminate and if the code will be stored in engine control module memory. Some examples include code P0171 for a too lean condition on bank 1, which could be caused by issues with the heated oxygen sensor, mass air flow sensor, or fuel pressure. Code P0300 indicates random or multiple cylinder misfires that may stem from ignition system problems, injector issues, or vacuum hose connections. Code P0335 relates to a fault in the crankshaft position sensor circuit.

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Clodoaldo Biassio
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81 views1 page

DTC No. (See Page) Detection Item Trouble Area MIL Memory: Diagnostics

This document provides diagnostic trouble codes (DTCs) for Toyota Corolla vehicles from April 2003. It lists various DTCs, the systems or components they correspond to, and whether the malfunction indicator light will illuminate and if the code will be stored in engine control module memory. Some examples include code P0171 for a too lean condition on bank 1, which could be caused by issues with the heated oxygen sensor, mass air flow sensor, or fuel pressure. Code P0300 indicates random or multiple cylinder misfires that may stem from ignition system problems, injector issues, or vacuum hose connections. Code P0335 relates to a fault in the crankshaft position sensor circuit.

Uploaded by

Clodoaldo Biassio
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© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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05–37

DIAGNOSTICS – SFI SYSTEM (April, 2003)

DTC No.
Detection Item Trouble Area MIL*1 Memory
(See Page)
 Air induction system
 Injector blockage
 Mass air flow sensor
 Engine coolant temperature sensor
 Fuel pressure
 Gas leakage in exhaust system
P0171  Open or short in heated oxygen sensor (bank 1, sensor 1)
System too Lean (Bank 1)  
(05–136) circuit
 Heated oxygen sensor (bank 1, sensor 1)
 Heated oxygen sensor heater (bank 1, sensor 1)
 EFI relay
 PCV valve and hose
 PCV hose connection
 ECM
 Injector leak, blockage
 Mass air flow sensor
 Engine coolant temperature sensor
 Ignition system
 Fuel pressure
P0172  Gas leakage in exhaust system
System too Rich (Bank 1)  
(05–136)  Open or short in heated oxygen sensor (bank 1, sensor 1)
circuit
 Heated oxygen sensor (bank 1, sensor 1)
 Heated oxygen sensor heater (bank 1, sensor 1)
 EFI relay
 ECM

P0300 Random/Multiple Cylinder Misfire  Open or short in engine wire


 Connector connection *2 
(05–149) Detected
 Vacuum hose connection
P0301  Ignition system
Cylinder 1 Misfire Detected *2 
(05–149)  Injector
 Fuel pressure
P0302  Mass air flow sensor
Cylinder 2 Misfire Detected *2 
(05–149)  Engine coolant temperature sensor
 Compression pressure
press re
P0303  Valve clearance
Cylinder 3 Misfire Detected *2 
(05–149)  Valve timing
 PCV h hose connection
i
P0304  PCV hose
Cylinder 4 Misfire Detected *2 
(05–149)  ECM
 Open or short in knock sensor circuit
P0325 Knock Sensor 1 Circuit (Bank 1
 Knock sensor (under–torqued or loose)  
(05–163) or Single Sensor)
 ECM
 Open or short in knock sensor circuit
P0327 Knock Sensor 1 Circuit Low In-
 Knock sensor (under–torqued or loose)  
(05–163) put (Bank 1 or Single Sensor)
 ECM
 Open or short in knock sensor circuit
P0328 Knock Sensor 1 Circuit High In-
 Knock sensor (under–torqued or loose)  
(05–163) put (Bank 1 or Single Sensor)
 ECM
 Open or short in crankshaft position sensor circuit
P0335 Crankshaft Position Sensor ”A”  Crankshaft position sensor
 
(05–168) Circuit  Signal plate (crankshaft)
 ECM
 Open or short in crankshaft position sensor circuit
P0339 Crankshaft Position Sensor ”A”  Crankshaft position sensor
 
(05–168) Circuit Intermittent  Signal plate (crankshaft)
 ECM

2004 COROLLA (RM1037U)

Author: Date: 202

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