Data Link Error
Error in communication between engine control modules.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The engine computer isn't properly communicating with other control units, likely due to wiring issues or module failure.
What the computer is actually seeing
The engine control module detects that it cannot send or receive messages from another module, often timing out after several attempts.
What a healthy reading looks like
Communication should occur at expected intervals, typically within milliseconds for data packets.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Inspect wiring and connectors for damage or corrosion. Repair any issues found. Decision point: Is the wiring intact? Yes: Go to step 2. No: Repair wiring and retest.
- 22. Check the power supply to the affected modules. Expected voltage: 12V to 14V. Decision point: Is power present? Yes: Go to step 3. No: Repair power supply issue and retest.
- 33. Use a scanner to read any additional fault codes. Decision point: Are there related codes? Yes: Address those issues as per their diagnostic procedures. No: Consider module replacement.
Common causes
- Faulty wiring or connectors in the data link
- Defective control modules
- Corrosion or short circuits affecting communication lines
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Moderate severity means drivability can be affected; it's best to fix it soon.
Will this code come back after clearing?
If the underlying issue isn't resolved, yes, it likely will return.
Why do I see this code with other SPNs?
Data link errors often occur with multiple modules involved, leading to related fault codes.
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