Toyota fault codes
58 distinct codes across 69 real diagnostics on Toyota, including the Toyota-specific ones no generic code list can decode.
Toyota-specific codes
These are manufacturer-specific, which means the same code on another marque is a different fault. That is exactly why they have no page of their own here and no entry in any generic code list: a single description for one of these would be wrong more often than right. Below they are scoped to Toyota, ranked by how often we have actually seen them, which is a claim we can stand behind.
| Code | Diagnostics on Toyota |
|---|---|
| B1003 | 3 |
| C1201 | 2 |
| C1377 | 2 |
| P1443 | 2 |
| P1578 | 2 |
| P1A50 | 2 |
| B1326 | 1 |
| B132A | 1 |
| B1507 | 1 |
| B1782 | 1 |
| C1204 | 1 |
| C1298 | 1 |
| C1336 | 1 |
| C1419 | 1 |
| P1032 | 1 |
| P1047 | 1 |
| P1345 | 1 |
| P1346 | 1 |
| P1442 | 1 |
| P1604 | 1 |
| P1605 | 1 |
| U1F00 | 1 |
To turn one of these into a cause you need the marque, the model and the engine, which is what the tool does. A code on its own is a starting point, not an answer.
Standard codes we see most on Toyota
These are standardised, so they mean the same thing on every vehicle and each one has a page of its own. The counts are what we see on Toyota specifically.
| Code | What it is | On Toyota |
|---|---|---|
| P0420 | Catalyst system efficiency below threshold, bank 1 | 4 |
| P0335 | Crankshaft position sensor A circuit | 3 |
| P0505 | Idle air control system | 3 |
| B2226 | Not individually documented | 2 |
| B2227 | Not individually documented | 2 |
| B2251 | Not individually documented | 2 |
| P0016 | Crankshaft/camshaft position correlation, bank 1 sensor A | 2 |
| P0031 | O2 sensor heater control circuit low, bank 1 sensor 1 | 2 |
| P0037 | O2 sensor heater control circuit low, bank 1 sensor 2 | 2 |
| P0113 | Intake air temperature sensor 1 circuit high | 2 |
| P0138 | O2 sensor circuit high voltage, bank 1 sensor 2 | 2 |
| P0350 | Ignition coil primary/secondary circuit | 2 |
| P0400 | Exhaust gas recirculation flow | 2 |
| P0430 | Catalyst system efficiency below threshold, bank 2 | 2 |
| P0A0F | Engine failed to start | 2 |
| P20EE | SCR NOx catalyst efficiency below threshold, bank 1 | 2 |
| P220E | Not individually documented | 2 |
| U011B | Not individually documented | 2 |
| P0051 | O2 sensor heater control circuit low, bank 2 sensor 1 | 1 |
| P0087 | Fuel rail/system pressure too low | 1 |
| P008A | Low pressure fuel system pressure too low | 1 |
| P0093 | Fuel system leak detected, large leak | 1 |
| P00BA | Not individually documented | 1 |
| P0100 | Mass or volume air flow circuit | 1 |
| P0136 | O2 sensor circuit, bank 1 sensor 2 | 1 |
| P0141 | O2 sensor heater circuit, bank 1 sensor 2 | 1 |
| P0154 | O2 sensor circuit no activity detected, bank 2 sensor 1 | 1 |
| P0191 | Fuel rail pressure sensor circuit range/performance | 1 |
| P203F | Not individually documented | 1 |
| P2291 | Not individually documented | 1 |
| P2299 | Brake pedal and accelerator pedal position incompatible | 1 |
| P2566 | Turbocharger boost control position sensor circuit high | 1 |
What tends to go wrong on Toyota
By share of the codes we have seen on this marque. A description of our own caseload, not a reliability ranking.
- Body, manufacturer-specific · 13
- Powertrain, manufacturer-specific · 13
- Lambda and O2 sensors · 8
- Chassis, manufacturer-specific · 8
- Catalytic converter · 6
- Valve timing and camshaft · 5
FAQ
Frequently asked questions
How do I run a diagnosis?
Select the vehicle on Start, click the Diagnostic card and choose New diagnostic. Fill in the description, the error codes and the mileage, then click Analyze.
Learn more: Diagnostic (vehicle-first start), Diagnostic form: description, error codes and mileage
Do I have to type the codes from my scan tool?
No. Click the camera button next to Error codes and take or choose a photo (JPEG or PNG) of the scan tool's screen; WrenchLane reads the codes and their descriptions into the form. You can also speak them with the microphone.
Learn more: OBD reader photo scan (fault codes from a photo), Voice input for the problem description
Are the public fault code pages built from my diagnostics?
They are built from anonymised, aggregated diagnostics run in WrenchLane; no workshop, customer or vehicle can be identified. Each fault code page shows how often the code was seen across those diagnostics and in how many separate workshops.
Learn more: Fault code pages on wrenchlane.com (fault-code cluster)
Decode a Toyota code against the actual car
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