Home » P2500-P2599 Codes » P2590 P2590 Turbo Boost Control Position Sensor B Circuit Intermittent
OBD-II Trouble Code Technical Description
Turbo Boost Control Position Sensor "B" Circuit Intermittent
What does that mean?
This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles that have a turbocharger (Ford, GMC, Chevrolet, Hyundai, Dodge, Toyota, etc.). Although generic, the specific repair steps may vary depending on make/model.
This trouble code can typically apply to all turbocharged OBDII equipped engines, but shows up more often in certain Hyundai and Kia vehicles. The Turbo Boost Control Position Sensor (TBCPS) converts the turbo boost pressure into an electrical signal for the Powertrain Control Module (PCM).
The Turbo Boost Control Position Sensor (TBCPS) provides additional turbo boost pressure information to the Powertrain Control Module or PCM. This information is typically used to fine-tune the amount of boost provided to the engine by the turbocharger.
The boost pressure sensor provides the PCM with the rest of the information needed for turbo boost pressure calculations. Anytime there is an electrical problem with the TBCPS, depending on how the manufacturer wants to identify the fault, the PCM will set code P2590. This code is considered to be an electrical circuit fault only.
It also looks at the voltage signal from the TBCPS sensor to determine if it is correct at initial Key On Engine Off. This code could have been set because of mechanical (typically exhaust back pressure / intake restrictions) or electrical (boost pressure sensor/boost control position sensor circuit) issues.
Troubleshooting steps may vary depending upon manufacturer, type of sensor and wire colors to the sensor. Refer to a vehicle specific repair guide to determine which is the "B" sensor for your particular vehicle.
Related turbo boost control position sensor "B" circuit codes:
P2586 Turbocharger Boost Control Position Sensor "B" Circuit P2587 Turbocharger Boost Control Position Sensor "B" Circuit Range/Performance P2588 Turbocharger Boost Control Position Sensor "B" Circuit Low P2589 Turbocharger Boost Control Position Sensor "B" Circuit HighSymptoms
Symptoms of a P2590 code may include:
Malfunction Indicator Light On Poor performance Hesitation during acceleration Decrease in fuel economyCauses
Potential causes for this code to set are:
Open in the signal circuit to the TBCPS sensor - most likely Short to voltage in the signal circuit to the TBCPS sensor Short to ground in the signal circuit to the TBCPS sensor Open in power or ground at TBCPS sensor - most likely Failed TBCPS Sensor - possible Failed PCM - unlikelyDiagnostic and Repair Procedures
A good starting point is always to check for technical service bulletins (TSB) for your particular vehicle. Your issue may be a known issue with a known fix put out by the manufacturer and can save you time and money during diagnosis.
Next, locate the TBCPS sensor on your particular vehicle. This sensor is usually found directly screwed / bolted into the turbocharger housing. Once located, visually inspect the connector and wiring. Look for scraping, rubbing, bare wires, burn spots or melted plastic. Pull the connector apart and carefully inspect the terminals (the metal parts) inside the connector. See if they look burned or have a green tint indicating corrosion. Use electrical contact cleaner and a plastic bristle brush if cleaning of the terminals is needed. Let dry and apply electrical grease where the terminals contact.
If you have a scan tool, clear the diagnostic trouble codes from memory, and see if P2590 code returns. If it does not, then the connections were most li
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