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Source-backed diagnostic reference

P105422 Code: Meaning & Diagnostic Guide

Mack service information lists TECU P1054-22 for the tank air pressure sensor (SEPrSA). It describes the fault condition as air pressure above 1 mPa (145 psi); erratic clutch performance is an observable symptom. The document does not establish applicability to a 2021+ BEV or PHEV.

Reference status: This page preserves source-backed code definitions for discovery. Manufacturer/model applicability, repair steps and safety conclusions are not treated as verified unless a manufacturer-specific verified report is available.

What does P105422 mean?

  • GENERIC: Mack service information lists TECU P1054-22 for the tank air pressure sensor (SEPrSA). It describes the fault condition as air pressure above 1 mPa (145 psi); erratic clutch performance is an observable symptom. The document does not establish applicability to a 2021+ BEV or PHEV. Source

Is P105422 generic or manufacturer-specific?

P105422 has a generic source-backed definition in this database. The exact vehicle make, model, year and powertrain should be confirmed before using a definition for diagnosis.

P105422 symptoms

A diagnostic code identifies a detected condition; it does not by itself prove which component has failed. Symptoms can differ between vehicles. Record the exact warning message, any additional codes, and the operating condition when P105422 appeared.

Possible causes of P105422

Possible causes depend on the vehicle-specific definition and test results. Do not conclude that a named component has failed from P105422 alone; wiring, connections, control conditions and component tests should be evaluated using manufacturer procedures.

How to diagnose P105422

  1. Confirm the exact P105422 reading with a compatible scan tool and record any accompanying codes.
  2. Confirm the vehicle make, model, model year and powertrain before applying a reference definition.
  3. Prefer a verified manufacturer-specific report when one is available.
  4. Follow the manufacturer diagnostic procedure before replacing parts.

How to fix P105422

There is no safe universal parts-replacement fix for P105422 without vehicle-specific evidence. The correct resolution depends on the confirmed definition and diagnostic test results.

Can I drive with P105422?

A universal drive/no-drive answer cannot be inferred from P105422 alone. Follow the vehicle warning and manufacturer instructions.

P105422 frequently asked questions

What does P105422 mean?

Mack service information lists TECU P1054-22 for the tank air pressure sensor (SEPrSA). It describes the fault condition as air pressure above 1 mPa (145 psi); erratic clutch performance is an observable symptom. The document does not establish applicability to a 2021+ BEV or PHEV.

Can different manufacturers use P105422 differently?

Yes. Generic definitions and manufacturer-labelled definitions can coexist, so vehicle context matters.

Should I replace a part immediately?

No. A code is a diagnostic starting point, not proof that a named component has failed.

Search variants and canonical URL

Capitalization, underscores, hyphens, colons and spaces are normalized to this canonical code identity so alternate scan-tool formats do not create duplicate pages.