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.
1990 Ford Bronco II 4WD, Standard, M5OD-R1FACTORY OEM SERVICE PROCEDURE
Yes, Pass Code 11 Received
If an Engine Running pass code 11 is received and:
- Any non-pass (non 11) Continuous codes were previously received in STEP 3.0, go to: - STEP 8.0: CONTINUOUS CODE-TO-TEST CHART
- A Continuous pass code 11 was received in STEP 3.0 and no driveability symptoms are present, the EEC-IV system is fault-free. Testing is complete.
- A Continuous pass code 11 was received in STEP 3.0 and driveability symptoms are present, go to STEP 9.0: DIAGNOSIS BY SYMPTOM
Factory Service Tools
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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.