OBD-II trouble code
P0249: Turbocharger/Supercharger Wastegate Solenoid "B" Low
SAE J2012 APR2002: wastegate solenoid B low. The readable driver-low pattern found in print was not labeled B. The printed pair is RepairPal's boost-pressure solenoid, scoped to solenoid B. Wiring is outside it.
Quick facts
- System
- Powertrain
- Category
- Fuel & Air
- Severity
- Medium severity
- Drivable
- Usually safe to drive short-term
- Repair cost range
- $206 – $241 (turbocharger boost-pressure solenoid B replacement, parts and labor, RepairPal national average updated 3 September 2026; wiring is outside this pair)
- DIY difficulty
- Intermediate DIY
Browse every code in P0200–P0299, or start from the full code library.
What does P0249 mean?
SAE J2012 APR2002 names P0249 Turbo/Super Charger Wastegate Solenoid "B" Low. Circuit low is measured with the solenoid connected. P0250 is the high row on the same letter. P0245 is solenoid A's low row. Section 3.8 does not tell you which connector is B.
The 2011 GM 11OBDGS2 extract's low cell is merged with a bypass-valve row and is not marked with a B. The readable sibling is P0246, circuit high, engine running. Copying that enable onto P0249, or copying P0245's 'do not jumper 12 V' warning onto the wrong connector, is how a second solenoid gets the first solenoid's test. Find B on the diagram, see whether that driver switches ground or switches power, and run the short-to-ground check with that solenoid unplugged and its module unplugged, ignition off. An unplugged pin that sits low is not a finished verdict: the module may no longer be pulling the circuit, and the short check is the resistance test with both ends open.
RepairPal's turbocharger boost pressure solenoid replacement, updated 3 September 2026, is $206–$241 (labor $75–$111, parts around $130). The printed pair is that national average, scoped to solenoid B because SAE J2012 names P0249 wastegate solenoid B low. The listing is not split by letter. A shorted wire is outside the pair. Diagnosis is $125–$183 labor and is separate.
Common causes
- A below-range reading on the B control circuit with the coil connected
- A short to ground on the B control terminal the diagram names
- An open wire in that circuit, checked separately from the short
Symptoms
- P0249 stored
- The fault present with solenoid B connected, matching the circuit-low definition
- P0245 stored on the other solenoid, which is a second repair
- No B pin number on this page, because none of the sources read assigned one
Diagnostic steps
- 1.Identify connector B before a terminal is back-probed. P0245's hardware is not the default.
- 2.Read whether B's driver switches the ground leg or the feed. The short-to-ground measurement has to be on the leg the chart names.
- 3.Ignition off. Unplug solenoid B and unplug the module that drives it. Measure the short to ground, then measure continuity of that wire as a separate result. A low voltage with only the solenoid unplugged skips the module.
- 4.Do not feed that control pin from the battery. Resistance, if the chart gives a window, is connector off and ignition off.
- 5.Leave the 1.90 mg/sec bypass figure in the merged cell it came from.
- 6.The printed pair is RepairPal's solenoid average, scoped to solenoid B. A wiring repair is outside it. The listing itself is not labeled B.
- 7.Verify with solenoid B connected, in the monitor's engine state, clear of the belt and the fan.
Repair cost
$206 – $241 (turbocharger boost-pressure solenoid B replacement, parts and labor, RepairPal national average updated 3 September 2026; wiring is outside this pair)
RepairPal's turbocharger boost pressure solenoid replacement, updated 3 September 2026, is $206–$241 (labor $75–$111, parts around $130). The printed pair is that national average, scoped to solenoid B because SAE J2012 APR2002 names P0249 Turbo/Super Charger Wastegate Solenoid "B" Low. Section 3.8 leaves the letter to the manufacturer. RepairPal's estimator does not label A or B. The 2011 GM 11OBDGS2 low cell is not marked B. A short to ground in the harness is a wiring repair and is outside the pair. Diagnosis is $125–$183 labor and is separate.
Estimate your repair
Run the numbers for your vehicle
Open the Repair Cost Estimator with check engine light diagnosis preselected. Adjust labor rate and vehicle category to fit your situation.
DIY vs shop
This is an intermediate DIY job. It usually involves diagnostic steps, specialty parts, and some careful work in tight spaces. If you have the tools and a service manual or trustworthy video for your specific vehicle, it is achievable in a weekend. Otherwise, a competent independent shop will be faster.