2F44
Critical2F44 — EWS: Manipulation Attempt Lockout (Anti-Theft Protection)
Description
What the Code Means
Code 2F44 is logged by the EWS (Electronic Immobilizer) system. It's stored when the CAS module detects a mismatch between the key code and the DME code, or registers an unauthorized key or module. Normally the CAS compares the key code against the DME code on every start attempt; if they match, it allows the start, and if they don't, it blocks it. That trigger mechanism is what prevents the engine from starting.
Symptoms
Symptoms
- The engine cranks on the starter but won't start.
- The car doesn't recognize the key.
- The immobilizer indicator light is on.
Causes and fixes
Diagnosis and Repair
- Connect ISTA and check key synchronization.
- Run the CAS reset procedure.
- If the car has a used CAS module from a donor, replace the DME and keys with the matching donor set: mismatched modules aren't synchronized with each other.
- Program a new CAS module with the correct coding.
- Clear the codes and do a test start.
Possible secondary damage
Secondary Problems
- Without a fix, the car stays immobile — it can't be driven.
- Repeated start attempts can corrupt the EWS data, which means you'll have to replace both the CAS and DME modules.