P012D

Turbocharger/Supercharger Inlet Pressure Sensor A Circuit High

Q: Is it safe to drive with P012D?

You can usually drive it, but the engine may be in reduced-power mode and slow to respond. Get it diagnosed before heavy or highway use.

Q: Can I just clear P012D?

It will return if the sensor or its wiring is faulty. Because the ECM uses this signal to manage boost, fix the circuit rather than just clearing.

Turbo/boost sensing Generic OBD-II High

What it means

P012D means the ECM sees an abnormally high voltage from the turbocharger or supercharger inlet pressure sensor A — usually a signal wire shorted to voltage, an open circuit, or a failed sensor. Because this reading helps manage boost, the engine may drop into reduced-power or limp mode. It's an electrical fault first, so check the sensor and its wiring before suspecting the turbo itself.

High

Can I keep driving? Usually driveable but down on power — a bad boost-inlet pressure signal can put the engine in reduced-power or limp mode until it's repaired.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Check-engine light on
Reduced power or limp (fail-safe) mode
Sluggish acceleration or lack of boost
Possible rough running under load

Common causes

Most likely first

Faulty turbocharger/supercharger inlet pressure sensor ALikely
Signal wire shorted to voltage or open in the sensor circuitCommon
Corroded or disconnected connector at the sensorCommon
Poor ground or reference-voltage fault to the sensorLess often
Faulty ECM/PCM (rare)Less often

How to diagnose & fix

Work through it in order

Read freeze-frame data and compare the sensor's live reading against a known-good reference or barometric pressure at key-on.
Inspect the sensor connector and wiring for a short to voltage, an open, or corrosion.
Verify the sensor's 5-volt reference and ground are present and clean.
Test the sensor's resistance/output per the manufacturer's spec; replace it if out of range.
If wiring and sensor check good, retest the circuit before considering the ECM. Clear and re-test.

FAQ

Quick answers

Is it safe to drive with P012D?+

You can usually drive it, but the engine may be in reduced-power mode and slow to respond. Get it diagnosed before heavy or highway use.

Can I just clear P012D?+

It will return if the sensor or its wiring is faulty. Because the ECM uses this signal to manage boost, fix the circuit rather than just clearing.

Read & clear P012D yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX