Powertrain, generic (extended)

P2C80 AIR System Pump Overspeed Bank 1

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

P2C80 says the secondary air pump on bank 1 is turning faster than it should. Newer designs use a brushless motor whose speed is measured: an FCA patent describes a pump with a Hall sensor and target wheel so the controller can infer the air mass delivered from the revolutions and adjust pump speed. If the pump spins too fast for its command, it is working against little or no resistance, or its speed control has lost authority. No manufacturer documents P2C80 publicly; CARB requires secondary air systems and their electrical parts to be monitored. Possible causes are a detached or split outlet hose, a damaged impeller or shaft coupling, and a faulty speed signal or pump electronics. Cold-start emissions rise while the car drives normally. P2C81 is overheating, P2445 a pump that delivers nothing.

Likely causes

Outlet hose detached or split so the pump runs without back-pressure
Damaged impeller or loose coupling between motor and impeller
Faulty speed signal (Hall sensor) or its wiring
Defective control electronics inside the pump

Symptoms

  • Check engine light
  • Louder or higher-pitched pump noise after a cold start
  • Secondary air readiness not completed, emissions test may fail

Repair estimate

DifficultyMediumDIY possible
Parts and labour€20–700
Time0.5–2.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

secondary air injection pump b1wiring harnessecm

Related codes

P2C81P2C82P2445P2444P0411

References: patents.google.com, law.cornell.edu, hella.com.