OBD Guide
ENFRDEESPT

P1CEF

Cold Climate Turbo Protection Engine De-Rate Mode

P1CEF is an OBD-II diagnostic trouble code meaning: Cold Climate Turbo Protection Engine De-Rate Mode. Common causes: very low ambient temperature, ambient temperature sensor malfunction. Estimated repair cost: $17–111.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–111 (est.)

Symptoms

  • Reduced engine power
  • Engine speed limit
  • Check Engine Light Illuminates
  • The car does not develop full power
  • Acceleration problems

Causes

  • Very low ambient temperature
  • Ambient temperature sensor malfunction
  • Problems with the turbocharger lubrication system
  • Turbocharger malfunction
  • Problems with ECU software

How to Fix

  1. Check the ambient temperature sensor readings
  2. Check the condition and level of the engine oil
  3. Diagnose the condition of the turbocharger
  4. Update ECU software if necessary
  5. Warm up the engine to operating temperature

Related codes

P0299P2262P2563

FAQ

What does the P1CEF code mean?

P1CEF is an OBD-II diagnostic trouble code that indicates: Cold Climate Turbo Protection Engine De-Rate Mode

What causes a P1CEF error code?

The most common causes of P1CEF include: Very low ambient temperature; Ambient temperature sensor malfunction; Problems with the turbocharger lubrication system; Turbocharger malfunction.

How do I fix a P1CEF diagnostic trouble code?

To fix P1CEF: Check the ambient temperature sensor readings. Check the condition and level of the engine oil. Diagnose the condition of the turbocharger. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1CEF?

Limited driving only, diagnose soon

How much does it cost to fix P1CEF?

The estimated repair cost for P1CEF is $17–111. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat