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 Thunderbird BaseFACTORY OEM SERVICE PROCEDURE
Continuous Code/Test Menu - 3.8L
CONTINUOUS MEMORY - CIRCUIT TEST & STEP
| Code No. | Go To: Test No. (Step No.) | |
|---|---|---|
| 14 | N (1) | |
| 15 | QB (1) | |
| 18 | ||
| (FWD AXOD PFI & RWD PFI) | N (4) | |
| (SC PFI) | N (3) | |
| 19 (SC PFI Only) | N (10) | |
| 22 | DF (90) | |
| 29 | ||
| (FWD AXOD PFI) | T (1) | |
| (RWD PFI & SC PFI) | DP (1) | |
| 31 | DL (90) | |
| 32 | DL (94) | |
| 33 | DL (97) | |
| 34 | DL (93) | |
| 35 | DL (90) | |
| 39 (FWD AXOD PFI Only) | T (30) | |
| 41 | H (29) | |
| 45 (SC PFI Only) | N (13) | |
| 46 (SC PFI Only) | N (13) | |
| 48 (SC PFI Only) | N (13) | |
| 49 (SC PFI Only) | P (10) | |
| 51 | DA (90) | |
| 53 | DH (90) | |
| 54 | DA (90) | |
| 56 (SC PFI Only) | DC (20) | |
| 61 | DA (93) | |
| 63 | DH (94) | |
| 64 | DA (90) | |
| 66 (SC PFI Only) | DC (10) | |
| 67 (SC PFI Only) | FA (1) | |
| 87 | ||
| (FWD AXOD PFI) | X (104) | |
| (RWD PFI & SC PFI) | J (95) | |
| 91 | H (29) | |
| 95 | ||
| (FWD AXOD PFI) | X (100) | |
| (RWD PFI & SC PFI) | J (90) | |
| 96 | ||
| (FWD AXOD PFI) | X (102) | |
| (RWD PFI & SC PFI) | J (93) | |
| No Codes/Codes Not Listed | QA (1) | |
Factory Service Tools
Use the Manual With the Right Hardware
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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.