Question 1

What does P0600 mean?

Accepted Answer

P0600 - Serial Communication Link Malfunction. Internal communication error within the PCM or between PCM and other modules.

Question 2

What are the symptoms of P0600?

Accepted Answer

Check engine light, Multiple other codes, Communication errors with scan tool

Question 3

What causes P0600?

Accepted Answer

PCM internal failure, CAN bus wiring issue, Module communication problem, Water damage to PCM, Aftermarket accessory interference

Question 4

How much does it cost to fix P0600?

Accepted Answer

Typical repair cost: $100-$1,500. Check for aftermarket devices plugged into OBD2 port — insurance dongles, remote starts, cheap scanners left plugged in can cause CAN bus errors.

P0600 — Serial Communication Link Malfunction

Don't guess — diagnose P0600 the right way

Common symptoms of P0600

Common causes of P0600

Repair cost & difficulty

Vehicles commonly affected

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