U0442

Invalid Data Received From ECM/PCM B

Severity

🔴 High

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–389 (est.)

Symptoms

Unstable engine operation
Power Loss
Check Engine Light Illuminates
Gear shifting problems
Decreased fuel efficiency

Causes

Damage to the wiring harness between modules
Corroded or oxidized connectors
ECM/PCM malfunction
Grounding problems
Control unit software error

How to Fix

Check the integrity of the wiring between the modules
Inspect connectors for corrosion
Check ECM/PCM grounding
Flash or replace the control unit
Carry out CAN bus diagnostics

Related codes

U0441 U0443 U0401