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Home / Codes / P0106
DTC code page

P0106: Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance Problem

Quick answer: The MAP signal is present, but it does not make sense for current engine load or changes in throttle.

Drivers also search this fault as MAP range performance, baro sensor performance code, MAP sensor implausible signal.

Severity: medium Family: powertrain Related paths: 11
Meaning

What P0106 usually means

P0106 is the performance version of a MAP/barometric fault. The signal is not necessarily missing; instead, it is implausible compared with throttle angle, RPM, airflow, or expected vacuum. That makes P0106 a classic code for biased sensors, intake restrictions, vacuum leaks, carboned throttle issues, and load-calculation mismatches rather than a simple broken wire alone.

Fast triage

Start here before chasing parts

  • Scan first: save freeze-frame and pending codes before clearing anything.
  • Confirm the complaint: compare the stored code with current drivability symptoms.
  • Use context: trims, live data, and related codes usually narrow the fault faster than guesswork.
  • Work simplest to hardest: leaks, connectors, maintenance items, and known patterns before expensive components.
Initial checks

What to check first

  • Compare MAP, throttle position, and RPM on live data during idle and quick throttle movement.
  • Inspect for vacuum leaks or intake duct issues before assuming the sensor is lying.
  • If the engine also has lean or throttle-body codes, treat them as part of the same load-calculation problem instead of separate coincidences.
Driving risk

Can you keep driving?

Some vehicles with P0106 will still drive acceptably, but hesitation, unstable idle, or reduced power means the engine is operating on bad load information. Drive gently and diagnose it soon.

Moderate urgency: This code often allows short-term driving, but the right fix usually comes faster when you diagnose it early instead of waiting for more codes.
Likely causes

Common causes behind this code

  • MAP sensor that responds slowly or reads slightly biased across the load range
  • Vacuum leak or intake leak changing manifold pressure unexpectedly
  • Throttle body contamination affecting airflow and expected pressure change
  • Restricted air intake or exhaust flow creating abnormal pressure behavior
  • Intermittent wiring issue that distorts the signal without killing it entirely

Cause phrases often tied to this code: biased MAP sensor, vacuum leak, carboned throttle body, restricted intake, wiring issue.

Diagnostic order

Suggested workflow

  1. Review freeze-frame data to see whether the fault set at idle, tip-in, cruise, or decel.
  2. Check live MAP response against throttle movement to confirm the signal changes smoothly and proportionally.
  3. Inspect the intake tract, PCV plumbing, and manifold sealing for vacuum leaks or restrictions.
  4. Clean and inspect the throttle body if idle control or throttle angle looks unstable.
  5. Verify the sensor circuit electrically if the reading remains implausible after airflow and vacuum issues are ruled out.
Avoid guesswork

Common mistakes

  • Calling it a sensor failure without comparing MAP behavior to throttle and fuel-trim data.
  • Ignoring vacuum leaks because the sensor still has a signal.
  • Cleaning or replacing parts one at a time without first deciding whether the problem is airflow, vacuum, or circuit-related.
Repair path

Practical fix guidance

  • Fix the condition making load look wrong: vacuum leak, throttle contamination, intake restriction, or circuit fault.
  • If testing proves the sensor is biased, replace it and recheck plausibility under idle, snap-throttle, and cruise conditions.
  • Retest for related lean, throttle, or reduced-power codes because P0106 often sits in the middle of a larger airflow complaint.
Vehicle context

Affected brands in this MVP

Brand hubs help broaden internal linking now and can evolve into make-specific diagnostic notes later.

Aliases and common searches

English phrases tied to P0106

Useful when the driver knows the wording but not the exact DTC yet.

  • MAP range performance
  • baro sensor performance code
  • MAP sensor implausible signal
Related search intent

Queries this page can answer naturally

  • P0106 code meaning
  • what does P0106 mean
  • MAP performance problem
  • P0106 rough idle hesitation
FAQ

Quick questions about P0106

How is P0106 different from P0105?

P0105 is the broader circuit/malfunction code, while P0106 usually means the MAP signal is present but does not behave plausibly for actual engine conditions.

Can a vacuum leak trigger P0106?

Yes. A leak can change manifold pressure enough to make MAP data fail the ECU's rationality checks.

Does P0106 always cause reduced power?

Not always, but many vehicles will soften throttle response or limit performance when load calculation becomes unreliable.