P0693 Cooling Fan 2 Control Circuit Low

P0693 points to a low condition in the cooling fan 2 control circuit. The fan 2 control path is below the expected voltage or feedback range.

Code status

Needs verification

Not yet verified against SAE J2012_202509 / J2012DA. Treat unverified rows as a lookup aid, not repair authority.

System: Computer
Scope: iso-sae-controlled-p0
Standard: SAE J2012 / ISO 15031-6
Source: legacy-import

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not assume fan 2 is unnecessary on a cool engine; many tests require scan-tool command or A/C pressure conditions.

Useful checks before replacing parts

Check fan 2 command, relay or module output, control voltage, current draw, coolant temperature, A/C pressure request, battery voltage, and freeze-frame data.
Inspect fan 2 fuse feed, relay contacts, ground circuit, motor resistance, connector heat damage, wiring continuity, and fan module terminals.
Command fan 2 where supported and compare operation, voltage, and current draw with fan 1 or other speed stages.

Related OBD-II codes

These nearby computer entries can help compare wording and fault area. They may share the same verification status as the source database.