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 MANUALSFORD2021TRANSIT-350 HD BASE, VAN CARGO EXTENDED, 3.5L ENG VIN 8, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 657 (ENGINE IGNITION - 3.5L ECOBOOST (BM))DIAGNOSIS AND TESTINGENGINE IGNITIONDTC CHART(S)GLOBAL CUSTOMER SYMPTOM CODE (GCSC) CHART
2021 Ford Transit-350 HD Base, Van Cargo Extended, 3.5L Eng VIN 8, AWD
Global Customer Symptom Code (GCSC) Chart
2021 Ford Transit-350 HD Base, Van Cargo Extended, 3.5L Eng VIN 8, AWDSECTION Global Customer Symptom Code (GCSC) Chart
WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods .
Global Customer Symptom Code Chart
| Customer Symptom | Action |
|---|---|
| Start/Run/Move > Starting > No Crank > Always | GO to Pinpoint Test JB |
| Start/Run/Move > Starting > Slow Crank/Battery > Always | GO to Pinpoint Test JB |
| Start/Run/Move > Starting > Hard Start/Long Crank > Always | GO to Pinpoint Test DG |
| Start/Run/Move > Starting > Hard Start/Long Crank > Always | GO to Pinpoint Test JB |
| Start/Run/Move > Starting > Hard Start/Long Crank > Always | GO to Pinpoint Test JF |
| Start/Run/Move > Starting > Auto Start/Stop > Inoperative | GO to Pinpoint Test DG |
| Start/Run/Move > Starting > Auto Start/Stop > Inoperative | GO to Pinpoint Test JB |
| Start/Run/Move > Running > Smoke From Exhaust > White | GO to Pinpoint Test JB |
| Driving Performance > Runs Rough > Acceleration > Always | GO to Pinpoint Test DG |
| Driving Performance > Runs Rough > Acceleration > Always | GO to Pinpoint Test HD |
| Driving Performance > Runs Rough > Acceleration > Always | GO to Pinpoint Test JB |
| Driving Performance > Runs Rough > Acceleration > Always | GO to Pinpoint Test JF |
| Driving Performance > Runs Rough > Cruise/ Steady Speed > Always | GO to Pinpoint Test HD |
| Driving Performance > Runs Rough > Cruise/ Steady Speed > Always | GO to Pinpoint Test JB |
| Driving Performance > Runs Rough > Deceleration > Always | GO to Pinpoint Test JB |
| Driving Performance > Idle Quality > Fast > Always | GO to Pinpoint Test JB |
| Driving Performance > Idle Quality > Rolling > Always | GO to Pinpoint Test JB |
| Driving Performance > Idle Quality > Slow Return > Always | GO to Pinpoint Test JB |
| Driving Performance > Idle Quality > Rough > Always | GO to Pinpoint Test JB |
| Driving Performance > Idle Quality > Rough > Always | GO to Pinpoint Test JF |
| Driving Performance > Idle Quality > Stationary Elevated Idle Control > Performance/Function | GO to Pinpoint Test JB |
| Driving Performance > Stalls/Quits > At Idle > Always | GO to Pinpoint Test JB |
| Driving Performance > Stalls/Quits > Acceleration > Always | GO to Pinpoint Test JB |
| Driving Performance > Stalls/Quits > Cruise/ Steady Speed > Always | GO to Pinpoint Test JB |
| Driving Performance > Backfires > At Idle > Always | GO to Pinpoint Test JB |
| Driving Performance > Backfires > Acceleration > Always | GO to Pinpoint Test JB |
| Driving Performance > Backfires > Cruise/ Steady Speed > Always | GO to Pinpoint Test JB |
| Driving Performance > Backfires > Deceleration > Always | GO to Pinpoint Test JB |
| Driving Performance > Lack/Loss of Power > Acceleration > Always | GO to Pinpoint Test DG |
| Driving Performance > Lack/Loss of Power > Acceleration > Always | GO to Pinpoint Test JB |
| Driving Performance > Lack/Loss of Power > Acceleration > Always | GO to Pinpoint Test JF |
| Driving Performance > Lack/Loss of Power > Cruise/ Steady Speed > Always | GO to Pinpoint Test JB |
| Driving Performance > Lack/Loss of Power > Cruise/ Steady Speed > Always | GO to Pinpoint Test JF |
| Driving Performance > Spark Knock > Acceleration > Always | GO to Pinpoint Test DG |
| Driving Performance > Spark Knock > Acceleration > Always | GO to Pinpoint Test JB |
| Driving Performance > Spark Knock > Cruise/ Steady Speed > Always | GO to Pinpoint Test JB |
| Driving Performance > Poor Fuel Economy > City Driving > Unloaded | GO to Pinpoint Test JB |
| Driving Performance > Poor Fuel Economy > City Driving > Unloaded | GO to Pinpoint Test JF |
| Driving Performance > Poor Fuel Economy > Highway Driving > Unloaded | GO to Pinpoint Test JB |
| Driving Performance > Poor Fuel Economy > Highway Driving > Unloaded | GO to Pinpoint Test JF |
| Driving Performance > Poor Fuel Economy > Combined > Unloaded | GO to Pinpoint Test JB |
| Driving Performance > Poor Fuel Economy > Combined > Unloaded | GO to Pinpoint Test JF |
| Driving Performance > Hesitates/Stumble > Acceleration > Always | GO to Pinpoint Test JB |
| Driving Performance > Hesitates/Stumble > Acceleration > Always | GO to Pinpoint Test JF |
| Driving Performance > Hesitates/Stumble > Cruise/ Steady Speed > Always | GO to Pinpoint Test JB |
| Driving Performance > Engine Surge > At Idle > Always | GO to Pinpoint Test JB |
| Driving Performance > Engine Surge > Acceleration > Always | GO to Pinpoint Test JB |
| Driving Performance > Engine Surge > Cruise/ Steady Speed > Always | GO to Pinpoint Test JB |
| Driving Performance > Engine Surge > Deceleration > Always | GO to Pinpoint Test JB |
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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.