OBD Guide
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C2225

PCM Disables ECU

C2225 is an OBD-II diagnostic trouble code meaning: PCM Disables ECU. Common causes: critical engine failure causing the pcm to override other systems, malfunction of the pcm itself, leading to false locking. Estimated repair cost: $56–1111.

Severity
🚨 Critical
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–1111 (est.)

Symptoms

  • Several warning lights are on at the same time: Check Engine, ABS, ESP, suspension
  • Active safety systems (ESP, stabilization) are disabled
  • Possible symptoms of engine malfunction: unstable operation, loss of power
  • Limited mode of operation (Limp Mode) of the engine or transmission
  • Many related fault codes in different systems

Causes

  • Critical engine failure causing the PCM to override other systems
  • Malfunction of the PCM itself, leading to false locking
  • Lost communication via CAN bus between PCM and chassis ECU
  • PCM power supply problems (unstable voltage)
  • Software error in PCM requiring firmware update

How to Fix

  1. Read ALL Trouble Codes on All Systems - C2225 is usually accompanied by many other codes
  2. Diagnose and resolve fault codes in the PCM/engine first
  3. Check the integrity and quality of CAN bus signals
  4. Check PCM supply voltage and ground
  5. After correcting the main faults, reset the codes and check for C2225
  6. If C2225 remains with a healthy engine, diagnose the PCM for software errors

Related codes

C2220C2226U0100U0101P0600

FAQ

What does the C2225 code mean?

C2225 is an OBD-II diagnostic trouble code that indicates: PCM Disables ECU

What causes a C2225 error code?

The most common causes of C2225 include: Critical engine failure causing the PCM to override other systems; Malfunction of the PCM itself, leading to false locking; Lost communication via CAN bus between PCM and chassis ECU; PCM power supply problems (unstable voltage).

How do I fix a C2225 diagnostic trouble code?

To fix C2225: Read ALL Trouble Codes on All Systems - C2225 is usually accompanied by many other codes. Diagnose and resolve fault codes in the PCM/engine first. Check the integrity and quality of CAN bus signals. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C2225?

Do not drive — repair immediately

How much does it cost to fix C2225?

The estimated repair cost for C2225 is $56–1111. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat