P0247
Turbo/Supercharger Wastegate Solenoid B
If your code reader dashboard displays the generic DTC error code P0247, your vehicle is currently experiencing an active failure related to "Turbo/Supercharger Wastegate Solenoid B". Proper system troubleshooting is required to safely clear this warning.
Driver's Summary
Your vehicle's computer logged P0247 after detecting a malfunction in the turbo/supercharger wastegate solenoid b system. You may notice erratic boost levels, engine surging, check engine light, all of which are direct consequences of this malfunction. Given the high severity of this code, continuing to drive risks significant mechanical damage. Have it diagnosed immediately.
Symptoms
Erratic boost levels, engine surging, check engine light
Common Causes
- Failed wastegate control solenoid B
- Torn actuator diaphragm
- Clogged vacuum lines
- Damaged wiring
How to Fix
- 1 Replace wastegate solenoid B
- 2 Test and replace actuator
- 3 Clear vacuum lines
- 4 Repair wiring
Technical Explanation
To set P0247, the PCM samples the affected circuit multiple times per second, comparing live readings against manufacturer-programmed operating windows. Misfire rate is counted per cylinder over rolling windows and compared against two thresholds: a catalyst-damaging rate (triggers flashing MIL) and an emissions-exceeding rate (triggers solid MIL). The PCM logs which cylinder is misfiring based on crankshaft position at the time of each detected event. Once confirmed, the code is stored as a permanent DTC and the MIL is activated. The freeze frame snapshot — recording RPM, load, coolant temperature, and fuel trim at fault detection — is also saved and is critical for accurate diagnosis.
Is It Safe to Drive?
This fault carries real mechanical risk. The root causes — including failed wastegate control solenoid b — can trigger a chain reaction of component failures if the vehicle continues to be driven. Have it towed or drive directly to a shop without delay.
Mechanic's Pro Tip
For P0247, always perform a smoke test before replacing any parts — unmetered air from a cracked intake boot, split hose, or failed gasket is the root cause in the majority of lean fault cases and costs almost nothing to fix. After any repair, clear the code and watch short-term fuel trim (STFT) live on a scan tool; it should recover to within ±5% at idle within 2–3 minutes if the vacuum leak is truly resolved.
Related Fault Codes
Frequently Asked Questions
What does OBD2 code P0247 mean?
OBD2 code P0247 refers to Turbo/Supercharger Wastegate Solenoid B. If your code reader dashboard displays the generic DTC error code P0247, your vehicle is currently experiencing an active failure related to "Turbo/Supercharger Wastegate Solenoid B". Proper system troubleshooting is required to safely clear this warning.
What are the most common symptoms of DTC P0247?
Drivers experiencing code P0247 typically report: Erratic boost levels, engine surging, check engine light.
Is it safe to drive with trouble code P0247 active?
This fault carries real mechanical risk. The root causes — including failed wastegate control solenoid b — can trigger a chain reaction of component failures if the vehicle continues to be driven. Have it towed or drive directly to a shop without delay.
How much does it cost to fix code P0247?
The estimated repair cost for P0247 ranges from $80 to $400 USD. Solenoid: 80 - 200; Actuator: 150 - 300
Solenoid: 80 - 200; Actuator: 150 - 300
Need Professional Diagnostic Assistance?
Always verify sensor signals and wiring integrity with an OBD2 scanner before purchasing replacement parts.
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