Credov

P1622 fault code: what it means

P1622: Map cooling thermostat control circuit electrical fault.

Engine and gearbox (powertrain) · Minor

Usual causes, most likely first

  1. faulty map thermostat
  2. wiring fault

P1622 by make

BMW

Map cooling thermostat control circuit electrical fault.

Usual causes: faulty map thermostat; wiring fault

Suzuki

ECM EEPROM error (immobiliser data). Engine may not start; ECM may need replacing.

Usual causes: ECM internal fault

Not sure what P1622 means on your car? Ask Credov.

Before you clear it

Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.

Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.