Share a caseSign in
Air intakeSeverity Medium: diagnose soon

P0107Manifold Absolute Pressure/Barometric Pressure Circuit Low

What it means

The MAP sensor signal voltage is lower than the sensor can normally produce (usually below about 0.2 V on a 0–5 V sensor). Most often the signal wire is shorted to ground or the 5 V supply is missing.

Symptoms

  • Rough idle or hesitation
  • Poor fuel economy or black smoke
  • Limp mode on turbo engines

Common causes

  • Signal wire shorted to ground or chafed through
  • 5 V reference open, or pulled down by another faulty sensor on the same supply
  • Failed MAP sensor
  • Water or corrosion in the connector

What to check first

  1. With the key on, measure the 5 V reference at the connector (about 4.8–5.1 V)
  2. Back-probe the signal and watch it while wiggling the harness
  3. Unplug sensors that share the 5 V reference one at a time and see whether the supply recovers
Can I drive with P0107? Usually yes for a short distance, but performance or economy may suffer and the fault can get worse. Diagnose it soon.

Generic OBD-II meaning. Manufacturer-specific meanings and checks can differ; always check the service information for the car.

How to test the parts behind P0107

MAP and boost pressure sensorWiring, typical values, multimeter and scope tests

Cases with P0107 (0)

Share yours

No published cases with this code yet.

Colleagues asking about P0107

Ask for help

Stuck on P0107? Describe what you measured and ask the community.

P0107: questions and answers

What does P0107 mean?

P0107: Manifold Absolute Pressure/Barometric Pressure Circuit Low. The MAP sensor signal voltage is lower than the sensor can normally produce (usually below about 0.2 V on a 0–5 V sensor). Most often the signal wire is shorted to ground or the 5 V supply is missing.

What are the symptoms of P0107?

Rough idle or hesitation. Poor fuel economy or black smoke. Limp mode on turbo engines.

What causes P0107?

Signal wire shorted to ground or chafed through. 5 V reference open, or pulled down by another faulty sensor on the same supply. Failed MAP sensor. Water or corrosion in the connector.

How do you diagnose P0107?

1. With the key on, measure the 5 V reference at the connector (about 4.8–5.1 V) 2. Back-probe the signal and watch it while wiggling the harness 3. Unplug sensors that share the 5 V reference one at a time and see whether the supply recovers

Can I drive with P0107?

Usually yes for a short distance, but performance or economy may suffer and the fault can get worse. Diagnose it soon.