Broken boost hoses or loose hose clamps causing a boost leak (OBD-Codes.com says this commonly sets the code). Failed turbocharger or supercharger (both sources). Failed boost pressure sensor or MAP sensor (both sources). Wastegate failure, or a faulty turbo/supercharger control solenoid (OBD-Codes.com; RepairPal). Plugged catalytic converter (OBD-Codes.com). Diesel: faulty injection pressure control (IPC) or exhaust back pressure sensor (OBD-Codes.com). Wiring issue (RepairPal). Less often: brake booster pressure sensor failure or a PCM fault (RepairPal).

Repair or replace a leaking boost hose or loose clamp. Replace a faulty boost pressure or MAP sensor. Repair a sticking wastegate or replace the turbo control solenoid. Repair wiring or connector faults. Clean or replace the turbo if it shows oil past the seals, shaft end play, blade contact with the housing, or exhaust-side coking (OBD-Codes.com). Diesel: replace a faulty injection pressure control or exhaust back pressure sensor, or clear a clogged EGR pressure sensor line.

P2263🔧 Air intake / TurboDrive with caution, fix soon

P2263: Turbo/Supercharger Boost System Performance (Meaning, Causes, Fixes)

Q: What does P2263 mean?

P2263 means the engine computer sees that the turbocharger or supercharger boost system is not performing as expected. Boost leaks from cracked hoses or loose clamps, a failing turbo or wastegate, and a bad boost or MAP sensor are common causes. It shows up on gasoline and diesel engines, and diagnosis is more involved on diesels. A turbocharger (driven by exhaust gas) or supercharger (usually belt-driven) pressurizes the air going into the engine. The engine computer (PCM/ECM) uses sensors to check that the boost system delivers what it asks for. The two sources word the trigger differently. RepairPal says P2263 sets when the PCM determines the requested amount of boost is not being provided. OBD-Codes.com says it sets when the PCM sees exhaust pressure outside a predetermined threshold, either lower or higher, and notes the fault can involve the fuel delivery system as well as the turbo boost system, since the two affect each other. In practice, it is a general boost-system performance fault rather than a pure underboost code like P0299.

Q: Can I keep driving with P2263?

Drive with caution, fix soon. RepairPal rates P2263 moderate: it may not threaten safety right away, but get it diagnosed within a reasonable time. OBD-Codes.com adds that on diesels the engine may surge at idle, which it calls potentially dangerous, and may not start. Drive gently and avoid situations that need full power (merging, passing, towing). If the engine surges, you see heavy white or black smoke, or the turbo starts grinding, whining or screeching, stop driving and have it towed.

Reviewed 2026-10-22 · Based on 2 cited source(s)

What P2263 means

A turbocharger (driven by exhaust gas) or supercharger (usually belt-driven) pressurizes the air going into the engine. The engine computer (PCM/ECM) uses sensors to check that the boost system delivers what it asks for. The two sources word the trigger differently. RepairPal says P2263 sets when the PCM determines the requested amount of boost is not being provided. OBD-Codes.com says it sets when the PCM sees exhaust pressure outside a predetermined threshold, either lower or higher, and notes the fault can involve the fuel delivery system as well as the turbo boost system, since the two affect each other. In practice, it is a general boost-system performance fault rather than a pure underboost code like P0299.

Severity: can I keep driving?

Drive with caution, fix soon

RepairPal rates P2263 moderate: it may not threaten safety right away, but get it diagnosed within a reasonable time. OBD-Codes.com adds that on diesels the engine may surge at idle, which it calls potentially dangerous, and may not start. Drive gently and avoid situations that need full power (merging, passing, towing). If the engine surges, you see heavy white or black smoke, or the turbo starts grinding, whining or screeching, stop driving and have it towed.

Common symptoms

Check engine light on
Lack of boost from the turbo or supercharger (both sources)
Gasoline engines: sluggish feel, poor acceleration, unusual noises from under the hood (OBD-Codes.com)
Diesel engines: white or black exhaust smoke, lack of power, RPM won't reach the upper range, possible no-start, or surging at idle (OBD-Codes.com)
DPF (diesel particulate filter) regeneration may not occur (RepairPal)

Likely causes

Roughly most to least common, based on the sources below. Your vehicle may differ.

Broken boost hoses or loose hose clamps causing a boost leak (OBD-Codes.com says this commonly sets the code)
Failed turbocharger or supercharger (both sources)
Failed boost pressure sensor or MAP sensor (both sources)
Wastegate failure, or a faulty turbo/supercharger control solenoid (OBD-Codes.com; RepairPal)
Plugged catalytic converter (OBD-Codes.com)
Diesel: faulty injection pressure control (IPC) or exhaust back pressure sensor (OBD-Codes.com)
Wiring issue (RepairPal)
Less often: brake booster pressure sensor failure or a PCM fault (RepairPal)

Diagnostic steps you can do

⚠ Before you start

Work on a cool engine, parked on level ground with the parking brake set. Never work under a car supported only by a jack.

Fix any other stored trouble codes first, then look up technical service bulletins (TSBs) for your year, make, model and engine. OBD-Codes.com notes ongoing problems are often covered there with a factory repair procedure.
With the engine off and cool, inspect every intake and intercooler (boost) hose and clamp for cracks, splits or loose connections.
Check the oil supply line to the turbo for leaks.
Check the turbo's wastegate arm for free movement and that it closes fully, if it is accessible on your engine.
If you have a scan tool with live data, watch the boost pressure sensor reading for a steady signal and compare desired and actual boost on a gentle road test.

Typical fixes

Repair or replace a leaking boost hose or loose clamp
Replace a faulty boost pressure or MAP sensor
Repair a sticking wastegate or replace the turbo control solenoid
Repair wiring or connector faults
Clean or replace the turbo if it shows oil past the seals, shaft end play, blade contact with the housing, or exhaust-side coking (OBD-Codes.com)
Diesel: replace a faulty injection pressure control or exhaust back pressure sensor, or clear a clogged EGR pressure sensor line

Repair costs vary widely by vehicle, region, parts brand and shop, so we don't quote prices. Get a written estimate after diagnosis.

🛠 When to call a pro

Diesel engines, where OBD-Codes.com says a scan tool and service manual are needed because more components can cause it
Removing and inspecting the turbo (bearing seals, shaft play, blade damage)
A plugged catalytic converter or exhaust restriction is suspected
The engine surges at idle or won't start

Where to buy

Plain search links. Always match parts to your exact year, make, model and engine.

OBD2 scanners on Amazon Parts at Advance Auto Parts catalog at RockAuto

FAQs

What's the difference between P2263 and P0299?

P0299 specifically means underboost: actual boost stayed below what the computer asked for. P2263 is a broader boost-system performance code. RepairPal describes it as boost not meeting the request, while OBD-Codes.com describes it as exhaust pressure being outside the expected range in either direction.

Is P2263 more common on diesels?

OBD-Codes.com says it is common to gasoline and diesel engines alike, but diagnosis on a diesel is more complicated because more components can cause it. Owner reports on that site include Renault/Nissan 1.5 dCi diesels setting it under hard acceleration.

Will P2263 clear by itself?

RepairPal says most codes clear once the computer no longer detects the problem, but if the code stays it should be diagnosed to avoid a more serious problem.

Sources

Last reviewed 2026-10-22. Code definitions and repair steps can vary by manufacturer. Confirm with your vehicle's service information.