Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD2012FOCUS L4-2.0LREPAIR AND DIAGNOSISBODY AND FRAMEBODY CONTROL SYSTEMSTESTING AND INSPECTIONPINPOINT TESTSDIAGNOSTIC ROUTINE U
2012 Ford Focus L4-2.0L
Diagnostic Routine U
2012 Ford Focus L4-2.0LSECTION Diagnostic Routine U
Diagnostic Routine U
Diagnostic Overview
U0164:00
Normal Operation and Fault Conditions
DTC Fault Trigger Conditions
Pinpoint Test
1. VERIFY THE CUSTOMER CONCERN
1. Ignition ON.
2. Verify there is an observable symptom present.
Is an observable symptom present?
2. CHECK THE COMMUNICATION NETWORK
1. Ignition ON.
2. Using a scan tool, perform a network test.
Does the HVAC (Heating, Ventilation, and Air Conditioning) module pass the network test?
3. RETRIEVE THE RECORDED DTCs (Diagnostic Trouble Codes) FROM THE BCM (Body Control Module) SELF-TEST
1. Using a scan tool, perform the BCM (Body Control Module) self-test.
Is DTC (Diagnostic Trouble Code) U3003:16 or DTC (Diagnostic Trouble Code) U3003:17 recorded?
4. RETRIEVE THE RECORDED DTCs (Diagnostic Trouble Codes) FROM THE HVAC (Heating, Ventilation, and Air Conditioning) SELF-TEST
1. Using a scan tool, perform the HVAC (Heating, Ventilation, and Air Conditioning) self-test.
Is DTC (Diagnostic Trouble Code) U3006:16 or DTC (Diagnostic Trouble Code) U3006:17 recorded?
5. RECHECK THE BCM (Body Control Module) DTCs (Diagnostic Trouble Codes)
NOTE: If new modules were installed prior to the DTC (Diagnostic Trouble Code) being set, the module configuration may be incorrectly set during the PMI (Programmable Module Installation) or the PMI (Programmable Module Installation) may not have been carried out.
1. Clear the DTCs (Diagnostic Trouble Codes).
2. Wait 10 seconds.
3. Using a scan tool, perform the BCM (Body Control Module) self-test.
Is DTC (Diagnostic Trouble Code) U0164:00 still present?
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.