P0248 medium Severity

P0248: Turbocharger Wastegate Solenoid 'B' Range/Performance

Reduced engine power and boost control, may enter limp mode

Overview

OBD‑II DTC P0248 indicates an out‑of‑range or malfunction in the turbocharger wastegate solenoid B circuit affecting boost control.

Common Symptoms

  • Check Engine Light illuminated
  • Reduced engine power particularly under load
  • Poor acceleration or turbo lag
  • Abnormal turbo noise such as hissing or whistling
  • Decreased fuel efficiency

Most Common Causes

Faulty wastegate solenoid 'B' high

Internal electrical failure or worn solenoid preventing proper control.

Wiring harness issue (open/short/corrosion) high

Damaged wiring or poor connections in the solenoid circuit commonly triggers the code.

Vacuum or boost control hose leaks medium

Hose cracks or disconnections can affect wastegate operation and trigger the code.

Wastegate actuator mechanical binding medium

Mechanical linkage sticking can simulate solenoid performance issue.

Faulty Powertrain Control Module (PCM) low

Rare; consider only after wiring and solenoid tested.

Diagnostic Steps

  1. Connect OBD‑II scan tool and confirm P0248 plus any related codes
    Expected: P0248 present; check for freeze frame data
    Interpretation: Baseline to ensure correct code and context.
  2. Visually inspect wastegate solenoid 'B', wiring harness and connectors
    Expected: No damage, corrosion, open or burnt wires
    Interpretation: Pass indicates wiring likely not root cause; fail directs wiring repair.
  3. Measure solenoid resistance with multimeter
    Expected: Resistance within manufacturer spec (e.g., ~20‑40 ohms typical)
    Interpretation: Out‑of‑range indicates solenoid fault.
  4. Check voltage supply and ground to solenoid with ignition on
    Expected: Proper supply voltage and solid ground
    Interpretation: Incorrect readings indicate harness or PCM driver issue.
  5. Actuate solenoid with scan tool where possible and observe wastegate movement
    Expected: Solenoid actuates and wastegate responds
    Interpretation: Lack of actuation suggests solenoid or circuit fault.

Repair Solutions

Replace wastegate solenoid 'B' medium
Estimated Cost: $150 - $500

Most common and effective repair if solenoid fails testing.

Repair or replace damaged wiring/connectors medium
Estimated Cost: $50 - $200

Includes connector cleaning, corrosion correction and re‑routing.

Replace vacuum/boost hoses easy
Estimated Cost: $20 - $150

When leaks are identified affecting boost control.

PCM reflash or replacement hard
Estimated Cost: $500 - $1200

Only after confirming all other potential causes are eliminated.

Common Misdiagnoses

Avoid these common diagnostic mistakes:

  • Assuming turbocharger failure without verifying solenoid and wiring
  • Replacing PCM prematurely without full circuit testing
  • Ignoring vacuum/boost hose integrity leading to recurring code

Frequently Asked Questions

Can you explain the meaning of P0248?

The P0248 code stands for Turbocharger Wastegate Solenoid 'B' Range/Performance. This generally indicates an issue with the Air Intake system.

Can P0248 cause engine damage?

You should treat P0248 as a medium issue. Reduced engine power and boost control, may enter limp mode

How do I know if I have code P0248?

The most typical signs are: Check Engine Light illuminated, Reduced engine power particularly under load, Poor acceleration or turbo lag.

What causes the P0248 code?

Potential culprits include: Faulty wastegate solenoid 'B', Wiring harness issue (open/short/corrosion), Vacuum or boost control hose leaks. A proper diagnosis is recommended.

Estimated repair costs for different causes of P0248

Expect to pay around $150 if the issue is a Replace vacuum/boost hoses, but up to $1200 if the PCM reflash or replacement needs replacement.

What cars are affected by the P0248 code?

P0248 is not specific to any one brand. It can appear on Ford, Dodge, Toyota, Honda, Jeep, and other vehicles.

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