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HOMESERVICE MANUALSTOYOTA2004CELICA GT, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 110 (ENGINE CONTROL SYSTEM SELF DIAGNOSTICS)DIAGNOSTIC TROUBLE CODE DEFINITIONS

2004 Toyota Celica GT, Standard

Diagnostic Trouble Code Definitions

2004 Toyota Celica GT, StandardSECTION Diagnostic Trouble Code Definitions

WARNING: This page is about a different car, the 2003 Toyota MR2. However, it is still accessible from the selected car via links, so may be relevant.

DIAGNOSTIC TROUBLE CODE DEFINITIONS

DTC ⁽¹⁾

Description

P0010

Camshaft Position "A" Actuator Circuit (Bank 1)

P0011

Camshaft Position "A" Timing Over Advanced Or System Performance (Bank 1)

P0012

Camshaft Position "A" Timing Over Retarded (Bank 1)

P0016

Crankshaft Position/Camshaft Position Correlation (Bank 1, Sensor "A")

P0031

Oxygen Sensor Heater Control Circuit Low (B1, S1)

P0032

Oxygen Sensor Heater Control Circuit High (B1, S1)

P0037

Oxygen Sensor Heater Control Circuit Low (B1, S2)

P0038

Oxygen Sensor Heater Control Circuit High (B1, S2)

P0051

Oxygen Sensor Heater Control Circuit High (B2, S1)

P0052

Oxygen Sensor Heater Control Circuit High (B2, S1)

P0100 ⁽⁴⁾

Mass Airflow Meter Circuit

P0101

Mass Airflow Meter Circuit Range/Performance

P0110 ⁽⁴⁾

Intake Air Temperature Sensor Circuit

P0115 ⁽⁴⁾

Engine Coolant Temperature Sensor Circuit

P0116

Engine Coolant Temperature Sensor Circuit Range/Performance

P0120 ⁽⁴⁾

Throttle Position Sensor/Switch "A" Circuit (M/T)

P0120 ⁽⁴⁾

Throttle/Pedal Position Sensor/Switch "A" Circuit (Sequential M/T)

P0121

Throttle/Pedal Position Sensor Circuit Range/Performance

P0128

Coolant Thermostat Malfunction

P0130

Heated Oxygen Sensor Circuit (Bank 1 Sensor 1)

P0133

Heated Oxygen Sensor Circuit Slow Response (Bank 1 Sensor 1)

P0134

Oxygen Sensor Circuit No Activity (Bank 1 Sensor 1)

P0136

Heated Oxygen Sensor Circuit (Bank 1 Sensor 2)

P0150

Heated Oxygen Sensor Circuit (Bank 2 Sensor 1)

P0153

Heated Oxygen Sensor Circuit Slow Response (Bank 2 Sensor 1)

P0154

Oxygen Sensor Circuit No Activity (Bank 2 Sensor 1)

P0171

System Too Lean (Bank 1)

P0172

System Too Rich (Bank 1)

P0174

System Too Lean (Bank 2)

P0175

System Too Rich (Bank 2)

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

P0325 ⁽⁴⁾

Knock Sensor Circuit

P0335

Crankshaft Position Sensor Circuit

P0340

Camshaft Position Sensor Circuit

P0420

Catalyst System Efficiency Below Threshold

P0441

Incorrect EVAP Purge Flow

P0442

EVAP Leak Detected (Small Leak)

P0446

EVAP Vent Control Circuit

P0450

EVAP Pressure Sensor Circuit

P0451

EVAP Pressure Sensor Range/Performance

P0456

EVAP Leak Detected (Very Small Leak)

P0500

Vehicle Speed Sensor Circuit

P0504

Brake Switch "A"/"B" Correlation⁽⁶⁾⁽⁷⁾

P0505 ⁽⁵⁾⁽⁶⁾

Idle Air Control System Circuit

P0505 ⁽⁶⁾⁽⁷⁾

Idle Air Control System Circuit

P0511 ⁽⁵⁾⁽⁶⁾

Idle Air Control System Circuit

P0560

System Voltage

P0571

Brake Switch "A" Circuit ⁽⁶⁾⁽⁷⁾

P0604 ⁽⁶⁾⁽⁷⁾

Internal Control Module RAM Error

P0606 ⁽⁶⁾⁽⁷⁾

Engine Control Module Processor

P0607 ⁽⁶⁾⁽⁷⁾

Control Module Performance

P0617

Starter Relay Circuit High

P0657 ⁽⁶⁾⁽⁷⁾

Actuator Supply Voltage Circuit Open

P0724 ⁽⁶⁾⁽⁷⁾

Brake Switch "B" Circuit High

P1126 ⁽⁶⁾⁽⁷⁾

Magnetic Clutch Circuit

P1645 ⁽³⁾

Multiplex Communication Malfunction

P1646 ⁽⁶⁾⁽⁷⁾

Transmission Control ECU Malfunction

P2102 ⁽⁶⁾⁽⁷⁾

Throttle Actuator Control Motor Circuit Low

P2103 ⁽⁶⁾⁽⁷⁾

Throttle Actuator Control Motor Circuit High

P2111 ⁽⁶⁾⁽⁷⁾

Throttle Actuator Control System-Stuck Open

P2118 ⁽⁶⁾⁽⁷⁾

Throttle Actuator Control Motor Current Range/Performance

P2119 ⁽⁶⁾⁽⁷⁾

Throttle Actuator Control Throttle Body Range/Performance

P2120 ⁽⁶⁾⁽⁷⁾

Throttle/Pedal Position Sensor/Switch "D" Circuit

P2121 ⁽⁶⁾⁽⁷⁾

Accelerator Pedal Position Sensor Range/Performance

U0001 ⁽⁶⁾⁽⁷⁾

Transmission Control ECU Malfunction

⁽¹⁾	Some DTCs are two-trip detection logic DTCs. For more information, see TWO-TRIP DETECTION LOGIC under SELF-DIAGNOSTIC SYSTEM.

⁽²⁾	DTC applies to models equipped with engine immobilizer system. MIL will not illuminate if DTC exists. For testing procedures, see appropriate ENGINE IMMOBILIZER SYSTEMS article in ACCESSORIES & EQUIPMENT.

⁽³⁾	MIL will not illuminate.

⁽⁴⁾	If this DTC is set, Engine Control Module (ECM) will enter fail-safe mode.

⁽⁵⁾	DTC applies only to models with standard type manual transaxle.

⁽⁶⁾

There are 2 types of manual transaxles used. A standard type manual transaxle and a sequential manual transaxle. Standard type manual transaxle is a common transaxle in which the driver operates the clutch and shifts the transaxle. Sequential manual transaxle is an electronically controlled manual transaxle in which the clutch is operated and transaxle is shifted hydraulically by moving the shift lever forward or backward. Sequential manual transaxle may be identified by shift lever pattern which consists of "R", "N", "S" and "+" in place of the conventional type shift lever pattern and no clutch pedal is used.

⁽⁷⁾	Applies to models with sequential manual transaxle.

RENDER: 1.0x

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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.