Toyota Diagnostic Trouble Codes
OBD2 fault codes seen on Toyota vehicles, with what each code means, its typical repair cost range, and notes on specific Toyota models.
Electrical
"A" Camshaft Position Actuator Circuit (Bank 1)
Toyota Corolla • 2008-2024
Toyota's VVT-i system on the 1ZR-FE and 2ZR-FE engines is generally reliable, but the oil control va...
Intake Camshaft Position - Timing Over-Retarded (Bank 1)
Toyota Camry 2.4L / 2.5L • 2007-2017
2AZ-FE and 2AR-FE engines suffer from VVT oil filter screen clogging. Extended oil intervals make it...
Throttle Position Sensor/Switch A Circuit Range/Performance Problem
Toyota Camry • 2002-2011 (2AZ-FE 2.4L, ETCS-i electronic throttle)
The 2AZ-FE throttle body (Denso 22030-28070) has a known internal TPS wear issue. Cleaning gives a f...
Throttle/Pedal Position Sensor/Switch A Circuit Low Input
Toyota Camry • 2007-2017 (2.5L 2AR-FE and 3.5L 2GR-FE)
The TPS is integrated into the throttle body (Toyota part 22030-0H030 range) and not sold separately...
Throttle/Pedal Position Sensor/Switch A Circuit High Input
Toyota Camry • 2002-2011
2AZ-FE and 2GR-FE ETCS-i throttle bodies (22030-28070 / 22030-31010) rarely fail early, but when P01...
Knock Sensor 1 Circuit Malfunction (Bank 1 or Single Sensor)
Toyota Camry • 2002-2011
1MZ-FE and 2GR-FE V6 engines are the classic P0325 case. The sensor sits in the valley under the int...
Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor)
Toyota Camry • 2007-2024
The 2GR-FE V6 (2007 to 2017 Camry) has knock sensors mounted in the valley between the cylinder bank...
Camshaft Position Sensor A Circuit Malfunction (Bank 2)
Toyota Tacoma 1GR-FE 4.0L V6 • 2005-2015
1GR-FE is generally reliable. The bank 2 camshaft position sensor runs hot next to the exhaust manif...
Idle Air Control System Circuit Low
Toyota Camry • 1997-2006
Older Camrys with the 5S-FE use a rotary-solenoid idle speed control valve mounted on the throttle b...
Idle Air Control System Circuit High
Toyota Camry • 1997-2006
Older Camrys with the 5S-FE use a rotary-solenoid idle speed control valve mounted on the throttle b...
Engine Oil Pressure Sensor/Switch Circuit Malfunction
Toyota Camry • 2007-2017
2AR-FE 2.5L switch sits above the oil filter housing, accessible from below. The switch itself rarel...
Emissions
"A" Camshaft Position - Timing Over-Advanced or System Performance (Bank 1)
Toyota Camry • 2002-2024
The 2AZ-FE 2.4L engine (2002-2009) has well-documented VVT-i issues triggering P0011, typically from...
Manifold Absolute Pressure/Barometric Pressure Circuit
Toyota Hilux • 2005-2015
On the 2.5 D-4D (2KD-FTV) and 3.0 D-4D (1KD-FTV) diesels, Toyota's repair manual (Argentine-built Hi...
Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance
Toyota Yaris • 2005-2024
The 1.0L and 1.3L naturally aspirated engines rarely trigger MAP sensor codes, but when P0106 appear...
Intake Air Temperature Sensor 1 Circuit
Toyota Prius • 2004-2009
On this Prius the IAT sensor is built into the mass air flow meter, and Toyota's monitor calls P0110...
O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1)
Toyota Corolla • 2005-2024
The 1ZR-FE and 2ZR-FE engines are generally reliable, and the upstream sensor is easily accessible o...
Oxygen Sensor Circuit No Activity Detected (Bank 1, Sensor 1)
Toyota Camry • 1997-2011
The 2AZ-FE 2.4L and 1MZ-FE 3.0L V6 can set P0134 when the original upstream sensor reaches the end o...
O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)
Toyota Camry • 2007-2024
The upstream sensor on the Camry is mounted on the exhaust manifold and exposed to the highest tempe...
O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 2)
Toyota Camry • 2007-2024
The downstream O2 sensor on the Camry 2.5L (2AR-FE) is easily accessible from under the car. The sen...
Exhaust Gas Recirculation (EGR) Flow Insufficient
Toyota Camry • 2007-2024
The Camry's petrol EGR system is simple and reliable, so P0401 is uncommon before about 150,000 km. ...
Catalyst System Efficiency Below Threshold (Bank 1)
Toyota Camry • 2007-2024
The 2007-2011 Camry with the 2.4L 2AZ-FE engine is especially prone to P0420 because of a known cata...
Catalyst System Efficiency Below Threshold (Bank 2)
Toyota Camry • 2007-2024
P0430 on the Camry V6 (2GR-FE) usually means the Bank 2 converter has reached the end of its life on...
Diesel Particulate Filter Efficiency Below Threshold (Bank 2)
Toyota Land Cruiser V8 D-4D • 2012-2021
DPF-equipped versions of the 4.5 V8 D-4D (1VD-FTV) in the Land Cruiser 200 carry two particulate fil...
Post Catalyst Fuel Trim System Too Lean Bank 1
Toyota Camry • 2007-2017
On the 2AZ-FE and 2AR-FE four-cylinders, an ageing downstream oxygen sensor at high mileage is a usu...
Intake Air System Leak
Toyota Camry 2.4L 2AZ-FE • 2002-2009
The 2AZ-FE is generally leak-tight, but the ribbed intake air connector between MAF and throttle bod...
O2 Sensor Circuit Range/Performance (Bank 1 Sensor 1)
Toyota Prius • 2003-2009
Toyota's manual for the second-generation Prius runs the air-fuel ratio sensor response test only on...
O2 Sensor Circuit Range/Performance (Bank 1 Sensor 1)
Toyota RAV4 3.5 V6 (2GR-FE) • 2006-2012
The 3.5 V6 (2GR-FE) was offered in this generation of RAV4 in North America and Australia, not in Eu...
Ignition
Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A)
Toyota Camry • 2007-2024
The 2AR-FE 2.5L uses a timing chain with a hydraulic VVT-i system. P0016 on this engine is often cau...
Knock Sensor 1 Circuit High Input (Bank 1 or Single Sensor)
Toyota Camry • 2007-2018
Camry V6 with the 2GR-FE has knock sensors under the intake manifold, so any P0328 repair is labour-...
Camshaft Position Sensor Circuit Malfunction
Toyota Camry • 2007-2024
The Camry CMP sensor on the 2AR-FE four-cylinder sits on the cylinder head near the camshaft sprocke...
Ignition Coil A Primary/Secondary Circuit Malfunction
Toyota Camry • 2002-2011
2AZ-FE 2.4L coils are generally durable, and most failures happen at high mileage. Access is straigh...
Ignition Coil B Primary/Secondary Circuit Malfunction
Toyota Camry • 2002-2011
2AZ-FE 2.4L and 1MZ-FE 3.0L V6 both develop valve cover gasket and spark plug tube seal leaks that f...
Ignition Coil C Primary/Secondary Circuit Malfunction
Toyota Camry • 2007-2017 (2AR-FE 2.5L I4, 2GR-FE 3.5L V6)
Toyota coils are generally durable and tend to fail only at high mileage. If P0353 appears on a 2GR-...
Ignition Coil D Primary/Secondary Circuit Malfunction
Toyota Camry • 2002-2018
2AZ-FE and 2AR-FE rarely lose coils. When P0354 appears on a Camry it's usually plugs left past 160,...
Fuel System
Mass or Volume Air Flow Circuit Malfunction
Toyota RAV4 2.4 (2AZ-FE) • 2004-2012
RAV4s with the 2.4 litre 2AZ-FE petrol use a hot-wire MAF meter, and Toyota's repair manual sets P01...
Mass Air Flow Sensor Range/Performance
Toyota Camry • 2007-2024
The Camry uses a Denso hot-wire MAF sensor. On the 2AR-FE 2.5L, the MAF is easily accessible at the ...
System Too Lean (Bank 1)
Toyota Camry • 2007-2024
The 2012-2017 Camry 2.5L (2AR-FE) commonly triggers P0171 from intake manifold gasket failures, espe...
System Too Rich (Bank 1)
Toyota Camry • 2007-2024
The 2AR-FE 2.5L in 2012-2017 Camrys can develop P0172 from a failing PCV valve that lets excess cran...
System Too Lean (Bank 2)
Toyota Camry • 2007-2024
P0174 only appears on the V6 Camry (2GR-FE), since the four-cylinder has a single bank and triggers ...
Idle Air Control System RPM Lower Than Expected
Toyota Camry • 2002-2018
Older Camrys with the 2AZ-FE and 2GR-FE use an electronic throttle body that fouls with carbon over ...
Idle Air Control System RPM Higher Than Expected
Toyota Camry • 2007-2024
The Camry 2AR-FE uses an electronic throttle body without a separate IAC valve. P0507 is almost alwa...
Bank 1 Air-Fuel Ratio Imbalance
Toyota Tundra 4.6 V8 • 2010-2019
On the 4.6 V8 (1UR-FE), bank 1 is the bank with cylinder 1, the cylinder farthest from the transmiss...
Bank 1 Air-Fuel Ratio Imbalance
Toyota Venza 2.7 • 2009-2016
For the 2.7 four-cylinder (1AR-FE), Toyota's manual sets P219A when the difference in air-fuel ratio...
Cooling System
Engine Coolant Temperature (ECT) Circuit
Toyota Corolla • 2005-2024
Toyota coolant temperature sensors are durable and P0115 is uncommon, but when it appears the connec...
Engine Coolant Temperature (ECT) Circuit Range / Performance
Toyota Corolla • 2005-2024
On the Corolla, P0116 most often traces to a thermostat that opens too early rather than a failed se...
Engine Coolant Temperature (ECT) Circuit Low
Toyota Corolla • 2005-2024
On the Corolla, P0117 most often comes from a shorted sensor or moisture-induced corrosion bridging ...
Engine Coolant Temperature (ECT) Circuit High
Toyota Corolla • 2005-2024
On the Corolla, P0118 most often traces to an open sensor or a loose connector. Check the plug is fu...
Coolant Thermostat Below Regulating Temperature
Toyota Camry • 2007-2024
The 2AR-FE 2.5L thermostat in 2012-2017 Camrys is accessible and straightforward to replace. Toyota ...
Misfire
Random/Multiple Cylinder Misfire Detected
Toyota Camry • 2007-2024
The 2.5L 2AR-FE in 2012 to 2017 Camrys is known for ignition coil failures that set P0300. The 2GR-F...
Cylinder 3 Misfire Detected
Toyota Yaris • 2006-2024
The 1.0-litre 1KR-FE and 1.5-litre 1NZ-FE engines are generally reliable, but spark plugs that excee...
Cylinder 5 Misfire Detected
Toyota Camry 3.5L V6 (2GR-FE) • 2007-2017
Cylinder 5 lives on the rear bank against the firewall. The upper intake plenum has to come off for ...
Cylinder 6 Misfire Detected
Toyota Camry • 2007-2018
Camry V6 with the 2GR-FE typically logs P0306 from a worn cylinder 6 coil or a clogged injector. Cyl...
EVAP System
Evaporative Emission System: Incorrect Purge Flow
Toyota Camry • 2007-2024
Toyota EVAP systems are reliable, so P0441 on a Camry usually points to the vacuum switching valve (...
Evaporative Emission System Leak Detected (Small Leak)
Toyota Yaris • 2006-2024
On a Yaris with a screw-on fuel cap, a worn cap seal is a cheap first thing to rule out for P0442. I...
Evaporative Emission System Vent Control Circuit
Toyota Camry • 2007-2024
Toyota Camry EVAP vent valves are located near the charcoal canister at the rear of the vehicle. The...
Evaporative Emission System: Very Small Leak
Toyota Camry • 2007-2024
Toyota EVAP systems often set P0456 from a loose or hardened fuel cap, so the cap seal is the first ...
Evaporative Emission System: High Purge Flow
Toyota Camry • 2007-2024
Toyota EVAP systems are durable, so a P0496 on a Camry usually points at a vacuum switching valve (t...
Transmission
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