P0248: Wastegate solenoid B outside expected performance
Turbocharger wastegate solenoid B range/performance
Severity: Severity not verified — if the car runs badly, have it inspected
The sources read give the meaning and causes but do not say how urgent this code is.
P0248 in short
P0248 is a turbocharger wastegate fault code. The wastegate valve B is not performing as the computer expects, or the computer found a fault on solenoid B. Wiring, the solenoid itself and, rarely, the engine computer are the usual causes. The sources read do not rate its urgency, so have it scanned and checked.
The wastegate controls how much exhaust bypasses the turbo, which sets boost. The computer drives it through a solenoid (also called a regulating valve) and watches that circuit. P0248 is titled "Turbocharger wastegate solenoid B range/performance" by the Delaware DMV list and "Turbocharger (TC) wastegate regulating valve B range/performance problem" by TroubleCodes.net.
TroubleCodes.net lists wiring, the wastegate valve and the engine computer as probable causes, and says it has no detailed technical guide for this code yet.
Most likely causes
These are general causes for this code across vehicles. None is specific to one make or model.
Cause 1: Wiring problem at the wastegate valve
Possible — needs testing- Why it ranks here
- TroubleCodes.net lists wiring first among the probable causes.
- What would change this
- Rises if damaged or corroded wiring is found. Falls if the wiring tests good.
Cause 2: Wastegate solenoid (B) failure
Common general cause- Why it ranks here
- The valve itself is named as a probable cause by TroubleCodes.net.
- What would change this
- Rises if the wiring is good and the valve resistance is off. Falls if the valve tests normal.
Cause 3: Engine computer fault
Possible — needs testing- Why it ranks here
- Listed as a probable cause but described as unlikely, so it ranks last.
- What would change this
- Rises only after wiring and valve both test good. Falls if either is faulty.
What to test first
Start at step 1. Each result tells you what it means and where to go next.
Step 1: Read the stored codes and inspect the wastegate solenoid B connector and wiring for damage, moisture or corrosion.
Warning:Keep hands and tools clear of the hot turbo and exhaust; let the engine cool first.
IfWiring or connector damage is found
It meansRepair it and retest.
IfWiring looks fine
It meansTest the solenoid.
Step 2: Test the wastegate solenoid and its circuit with a scan tool that can command it (bidirectional test), as TroubleCodes.net recommends.
Warning:Probing a live connector can short the circuit and damage the engine computer; a shop should do it.
IfThe solenoid fails the test
It meansReplace the solenoid.
IfSolenoid and wiring both test good
It meansSuspect the engine computer.
Symptoms
- Check engine light
Compare with: Check engine light with loss of power
How to fix
On your vehicle
RamYour car
2025 · 1500
Supported by vehicle dataNHTSA bulletin summaries for this model: names improperly installed wastegate rod retention clips with P0248-00 among the listed codes. Whether it is still current is not verified.
09-008-25 REV. BStatus unverified
Wastegate rod retention clips installed incorrectly, P0248-00 among codes (revision B)
20251500 · issued · NHTSA 11020622
Customers must have the MIL on and set one or more listed codes, which include P0248-00 (turbocharger wastegate actuator B); the cause named is improperly installed wastegate rod retention clips. The list of codes is cut off in the summary. Only the NHTSA flat-file summary was read, not the bulletin itself.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
09-008-25Status unverified
Wastegate rod retention clips installed incorrectly, P0248-00 among codes
20251500 · issued · NHTSA 11017151
Customers must have the MIL on and set one or more listed codes, which include P0248-00 (turbocharger wastegate actuator B); the cause named is improperly installed wastegate rod retention clips. The list of codes is cut off in the summary. Only the NHTSA flat-file summary was read, not the bulletin itself.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
FordYour car
2017 · F-150
Supported by vehicle dataNHTSA bulletin summary for this model: says loss of power with P0248 and other codes may come from a wastegate control actuator that is out of adjustment. Whether it is still current is not verified.
SSM 46452Status unverified
3.5L GTDI loss of power with P0244, P25B4, P0248 and P25B6 (F-150 and Raptor)
2017f-150 · issued · NHTSA 10099471
Loss of power or performance on 3.5L GTDI trucks with P0244, P25B4, P0248 and P25B6, which may be caused by a wastegate control actuator that is out of adjustment; the summary says to refer to the workshop manual before replacing any turbocharger parts. Only the NHTSA flat-file summary was read, not the bulletin itself.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
Related codes
No curated relationships for P0248 yet.
Sources and review
- P0248 trouble code summary
- P0248: NHTSA bulletin 11020622 (Wastegate rod retention clips installed incorrectly, P0248-00 among codes (revision B))
- P0248: NHTSA bulletin 11017151 (Wastegate rod retention clips installed incorrectly, P0248-00 among codes)
- P0248: NHTSA bulletin 10099471 (3.5L GTDI loss of power with P0244, P25B4, P0248 and P25B6 (F-150 and Raptor))
- On-Board Diagnostic Trouble Codes (generic code title list)
- Last reviewed
- Written by
- Saurabh K.
- Editorial review
- Pending
- Technician review
- Technician review pending
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