Fuel and air

P00C7 — Intake Air Pressure Sensor Correlation Fault (Bank 1)

Severity: medium Drive with care, to a shop

What P00C7 means

The engine control unit compares signals from several intake pressure sensors on bank 1, such as the MAP, boost and barometric (BARO) sensors. These readings are normally closely related: with the engine off they match ambient pressure, and when running they change in a predictable way. P00C7 sets when they disagree by more than allowed and the ECU can't tell which one to trust.

Symptoms

  • Check Engine Light on
  • Rough idle or hesitation on acceleration
  • Reduced power
  • Poor fuel economy
  • Erratic or implausible pressure sensor readings on a scan tool

Possible causes

  1. Faulty intake pressure (MAP) sensor
  2. Faulty barometric (BARO) or boost pressure sensor
  3. Damaged, corroded or loose wiring and connectors in the sensor circuits
  4. Vacuum or intake air leaks, including cracked hoses
  5. Badly clogged air filter or restricted intake
  6. ECU fault (rare)

How to diagnose

  1. Read all codes and freeze-frame data, and note any other pressure sensor codes
  2. With key on and engine off, compare MAP and BARO on a scan tool; both should be near ambient pressure
  3. Inspect sensor connectors and harness for looseness, moisture and corrosion
  4. Test the 5 V reference, ground and signal wires with a multimeter
  5. Check the intake tract, boots and vacuum hoses for cracks and leaks
  6. Inspect the air filter and intake for restriction
  7. Watch the readings with the engine running and changing RPM and compare them
  8. Swap in a known good sensor if one is suspect and see whether the code clears

Common fixes

  • Replace a faulty MAP sensor
  • Replace the BARO or boost pressure sensor
  • Repair wiring and clean or replace damaged connectors
  • Fix intake and vacuum leaks and replace damaged hoses
  • Replace the air filter
  • Clear the code and road test to confirm the repair

Questions and answers

What does P00C7 mean?

The ECU found that readings from multiple intake air pressure sensors on bank 1 don't agree with each other. The usual culprits are a bad sensor, its wiring, or an air leak.

Can I drive with P00C7?

Short trips to a shop are usually fine, but the engine may hesitate and lose power. Don't put off diagnosis for long.

How do I clear P00C7?

You can erase it with a scan tool, but it will return if the cause remains. Check the sensors, wiring and intake sealing first.

This is general information about the code. The meaning can differ between makes and models: a scan tool and the repair manual for your car will show the exact cause.