Cause
Sensor left disconnected after previous work
A connector never latched after something else was done to the car. A fault that appeared the same day as unrelated work is related to it until proven otherwise, and this is the cheapest thing on any list — worth a look before a meter comes out.
Typically an easy fix. Often worth checking before paying anyone to look.
Some of these codes mean you should stop driving
7 of the 25 codes this can cause indicate a fault where continuing to drive risks damage or is unsafe. Which one you have matters more than the cause does — read the code's own page before deciding.
Codes this can cause (25)
Codes where this is a likely explanation first, rather than merely a possible one.
- C004A Brake Lining Wear Sensor Likely for this code Moderate
- P0098 Intake Air Temperature Sensor 2 Circuit High Bank 1 Likely for this code Moderate
- P0113 Intake Air Temperature Sensor 1 Circuit High Bank 1 Likely for this code Moderate
- P012D Turbocharger/Supercharger Inlet Pressure Sensor A Circuit High Likely for this code Moderate
- P0198 Engine Oil Temperature Sensor A Circuit High Likely for this code Moderate
- P0277 Cylinder 6 Injector A Circuit High Likely for this code Stop driving High
- P0343 Camshaft Position Sensor A Circuit High Bank 1 or Single Sensor Likely for this code Stop driving High
- P0348 Camshaft Position Sensor A Circuit High — Bank 2 Likely for this code Stop driving High
- P0368 Camshaft Position Sensor B Circuit High — Bank 1 Likely for this code Stop driving High
- P0393 Camshaft Position Sensor B Circuit High — Bank 2 Likely for this code Stop driving High
- P04D1 Exhaust Gas Recirculation Temperature Sensor C Circuit High Likely for this code Moderate
- P051D Crankcase Pressure Sensor A Circuit High Likely for this code Moderate
- P077D Output Shaft Speed Sensor Circuit High Likely for this code Moderate
- P07C0 Input/Turbine Shaft Speed Sensor A Circuit High Likely for this code Moderate
- P24B1 Particulate Matter Sensor Circuit High Likely for this code Moderate
- P2BE0 Hybrid/EV Battery Coolant Level Sensor Circuit/Open Likely for this code High
- P00C0 Turbocharger/Supercharger Bypass Valve B Control Circuit Moderate
- P0118 Engine Coolant Temperature Sensor 1 Circuit High High
- P018D Fuel Pressure Sensor B Circuit High Moderate
- P0206 Cylinder 6 Injector A Circuit Stop driving High
- P0356 Ignition Coil F Primary Control Circuit/Open Stop driving High
- P040D Exhaust Gas Recirculation Temperature Sensor A Circuit High Moderate
- P20BC Reductant Heater A Control Circuit High Moderate
- P24AE Particulate Matter Sensor Circuit Moderate
- P24B6 Particulate Matter Sensor Heater Control Circuit High Moderate
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
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What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
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