P2590 — Turbocharger Boost Control Position Sensor "B" Circuit Intermittent/Erratic
OBD2 code P2590 flags a problem with the turbocharger / supercharger boost control (turbocharger boost control position sensor "B" circuit intermittent/erratic). Short, gentle driving to a shop is usually possible. Common culprits: vacuum or actuator line damage, boost leak in intercooler piping or hoses, stuck wastegate or faulty boost control solenoid.
powertrain (engine/transmission)
Is it safe to drive?
Drive with caution Drive gently and avoid boost. The car will likely be down on power and may be in limp mode; ignoring boost faults can overheat the engine and destroy the turbo — a far more expensive repair.
How to diagnose with an OBD scanner
- Read the code and freeze frame Connect an OBD2 scanner, confirm P2590 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
- Check for companion codes and TSBs Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many P0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
- Inspect wiring and connectors Visually inspect the wiring harness and connectors related to the turbocharger / supercharger boost control for damage, corrosion, chafing or poor contact.
- Subsystem check Pressure-test the intake piping for boost leaks — cracked intercooler hoses are the most common cause.
- Subsystem check Command the boost control solenoid with a scanner and verify wastegate movement.
- Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P2590 does not return.
Approximate repair cost
Repair cost depends on which component actually failed. Typical scenarios for P2590 (parts and labor, USD, independent shop rates): Turbocharger replacement: $1,200–$3,500; Replace boost control solenoid or actuator: $200–$600; Repair boost leak (hoses, clamps, intercooler): $100–$400. Overall, fixing P2590 usually costs between $100 and $3,500. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.
Common questions
How much does it cost to fix P2590?
Turbocharger replacement — $1,200–$3,500; Replace boost control solenoid or actuator — $200–$600; Repair boost leak (hoses, clamps, intercooler) — $100–$400. Exact cost depends on the root cause, your vehicle and local labor rates — a proper diagnosis is the cheapest first step.
How do I diagnose P2590 myself?
Start with a scan: confirm P2590, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the turbocharger / supercharger boost control, and verify the suspect component against live data before buying parts.
Is it safe to drive with P2590?
Drive gently and avoid boost. The car will likely be down on power and may be in limp mode; ignoring boost faults can overheat the engine and destroy the turbo — a far more expensive repair.
What is the most common cause of P2590?
The most common causes are: vacuum or actuator line damage, boost leak in intercooler piping or hoses, stuck wastegate or faulty boost control solenoid.
What does OBD2 code P2590 mean?
OBD2 code P2590 flags a problem with the turbocharger / supercharger boost control (turbocharger boost control position sensor "B" circuit intermittent/erratic). Short, gentle driving to a shop is usually possible. Common culprits: vacuum or actuator line damage, boost leak in intercooler piping or hoses, stuck wastegate or faulty boost control solenoid.
What does P2590 mean?
P2590 is logged by the onboard diagnostics when the turbocharger / supercharger boost control does not behave as expected. The official definition is “Turbocharger Boost Control Position Sensor "B" Circuit Intermittent/Erratic”. This is a powertrain (engine/transmission) category code.
The module monitors this system continuously while driving. When readings fall outside the expected range for a defined number of drive cycles, it stores P2590 and switches on the warning light. Freeze frame data saved with the code shows the exact conditions — rpm, load, temperature, speed — at the moment the fault was detected, which is the best starting point for diagnosis.
Common symptoms of P2590
- increased oil consumption
- limp-home mode
- significant loss of power
- Check Engine Light on
- black smoke under acceleration
What causes P2590?
- clogged intake or exhaust (DPF/cat)
- worn turbocharger
- boost leak in intercooler piping or hoses
- faulty boost pressure sensor
How to diagnose P2590
- Connect an OBD2 scanner, confirm P2590 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
- Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many P0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
- Visually inspect the wiring harness and connectors related to the turbocharger / supercharger boost control for damage, corrosion, chafing or poor contact.
- Pressure-test the intake piping for boost leaks — cracked intercooler hoses are the most common cause.
- Command the boost control solenoid with a scanner and verify wastegate movement.
- Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P2590 does not return.
How to fix P2590
Start with the cheapest and most common causes before replacing expensive parts:
- Turbocharger replacement — $1,200–$3,500
- Replace boost control solenoid or actuator — $200–$600
- Repair boost leak (hoses, clamps, intercooler) — $100–$400
How much does it cost to fix P2590?
Repair cost depends on which component actually failed. Typical scenarios for P2590 (parts and labor, USD, independent shop rates):
- Turbocharger replacement: $1,200–$3,500
- Replace boost control solenoid or actuator: $200–$600
- Repair boost leak (hoses, clamps, intercooler): $100–$400
Overall, fixing P2590 usually costs between $100 and $3,500. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.
Can you drive with P2590?
Drive gently and avoid boost. The car will likely be down on power and may be in limp mode; ignoring boost faults can overheat the engine and destroy the turbo — a far more expensive repair.