Two codes at once — P012A (turbo boost pressure sensor circuit) and P0095 (intake air temperature sensor 2 circuit) — look like two problems, but on most turbo Nissans they’re one combined sensor. Replace that single boost/air-temp sensor and both codes clear. Here’s how to confirm it and fix it, with live data on an iCarsoft CR Max P.
P012A + P0095 together almost always mean the combined turbo boost pressure / air temperature sensor (one part) or its wiring. Confirm the codes, locate the sensor on the intake/charge pipe, check the connector and harness, then replace the sensor (plug-and-play — the video shows a Bosch 0281 006 026-type unit). Clear the codes and check live data.
- P012A = turbo boost pressure sensor circuit; P0095 = intake air temp sensor 2 circuit.
- They appear together because both live in one combined sensor on the intake.
- Most likely cause: that sensor or its connector — replace it (note the part number).
- DIY-friendly: swap the plug-and-play sensor, clear codes, verify boost/temp in live data.
What P012A & P0095 mean
P012A is a turbocharger/supercharger boost pressure sensor “A” circuit fault (typically a low-voltage reading). P0095 is an intake air temperature (IAT) sensor 2 circuit fault. Both are electrical circuit codes — the ECU isn’t getting a trustworthy signal from the boost or air-temp element.
Why both codes appear together
On many turbo engines, the boost pressure sensor and the second air-temperature sensor are built into a single combined sensor that sits on the intake or charge pipe. Because they share one housing, one connector and one circuit, a single failed sensor sets both P012A and P0095 at the same time. That’s good news: one part usually fixes both codes.
Symptoms
- Check engine light on.
- Reduced power / limp-home mode — the ECU limits boost when it can’t trust the signal.
- Odd boost or intake-temperature values in live data.
Common causes
- The combined boost/air-temp sensor — the usual culprit.
- Wiring / connector at the sensor — damaged, corroded or loose.
- Less commonly a charge-pipe air leak or a supply/ground fault.
Watch the fix
Video credit: Nissan P012A P0095 TC Pressure / Air Temperature Sensor Circuit — How To Fix, by SA Diagnostic’s. Independent third-party demonstration.
Step-by-step fix
- Plug in the iCarsoft CR Max P, scan and confirm P012A and P0095. Check freeze-frame data.
- Locate the combined boost/air-temp sensor on the intake or charge pipe (the video points it out).
- Inspect the connector and wiring for damage or corrosion; make sure it’s seated properly.
- Check live data for boost pressure and intake air temp — implausible or flat-lined values confirm the sensor.
- Replace the sensor — it’s plug-and-play. Note the part number (the video shows a Bosch 0281 006 026-type unit) and fit an OEM-quality match.
- Clear the codes and re-scan; recheck live data to confirm sensible readings.
Verify with live data
After fitting the new sensor, use the CR Max P to confirm the repair. In live data, the intake air temperature should read close to ambient with the engine cold, and boost pressure should track sensibly as the engine loads up. Clear the codes, drive a cycle, and re-scan — a clean “No fault code found” screen means the combined sensor was the fault, exactly as the video shows.
Frequently asked questions
What do P012A and P0095 mean on a Nissan?
Why do P012A and P0095 appear together?
What are the symptoms?
What causes P012A and P0095?
Can I fix P012A and P0095 myself?
Which iCarsoft tool is used?
Will the codes come back after clearing them?
Disclaimer: Diagnostic and repair steps are general guidance — verify procedures and part numbers for your exact model and year. If you’re unsure, consult a qualified technician. The embedded video is an independent third-party demonstration. Prices are accurate at the time of writing.
