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.
1999 Cadillac DeVille BaseFACTORY OEM SERVICE PROCEDURE
Memory System DTCS
MEMORY SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| B0846 | BATTERY 2 OUT OF RANGE |
| B0856 | 5-VOLT REFERENCE OUT OF RANGE |
| B1656 | EEPROM WRITE ERROR |
| B1656 | EEPROM WRITE ERROR |
| B1658 | EEPROM CHECKSUM ERROR |
| B1658 | EEPROM CHECKSUM ERROR |
| B1982 | SOURCE/BATTERY VOLTAGE HIGH |
| B1982 | BATTERY/SOURCE VOLTAGE HIGH |
| B1983 | SOURCE/BATTERY VOLTAGE LOW |
| B1983 | BATTERY/SOURCE VOLTAGE LOW |
| B2101 | RECLINE AFT SWITCH FAILED |
| B2102 | RECLINE FORWARD SWITCH FAILED |
| B2103 | REAR VERTICAL DOWN SWITCH FAILED |
| B2104 | REAR VERTICAL UP SWITCH FAILED |
| B2105 | HORIZONTAL AFT SWITCH FAILED |
| B2106 | HORIZONTAL FORWARD SWITCH FAILED |
| B2107 | FRONT VERTICAL DOWN SWITCH FAILED |
| B2108 | FRONT VERTICAL UP SWITCH FAILED |
| B2109 | LUMBAR AFT (IN) SWITCH FAILED |
| B2109 | LUMBAR FORWARD SWITCH FAILED |
| B2110 | LUMBAR DOWN SWITCH FAILED (AL2) |
| B2111 | LUMBAR DOWN SWITCH FAILED (AM3) |
| B2112 | LUMBAR UP SWITCH FAILED (AL2) |
| B2112 | LUMBAR UP SWITCH FAILED (AM3) |
| B2115 | RECLINE SENSOR FAILED |
| B2116 | REAR VERTICAL SENSOR FAILED |
| B2117 | HORIZONTAL SENSOR FAILED |
| B2118 | FRONT VERTICAL SENSOR FAILED |
| B2119 | LUMBAR FORWARD/AFT SENSOR FAILED |
| B2120 | LUMBAR UP/DOWN SENSOR FAILED (AL2) |
| B2120 | LUMBAR UP/DOWN SENSOR FAILED (AM3) |
| B2130 | SEAT MOTOR FAILURE |
| B2130 | MEMORY 1 KEY MALFUNCTION |
| B2131 | MEMORY 2 KEY MALFUNCTION |
| B2132 | MEMORY EXIT KEY MALFUNCTION |
| B2133 | MEMORY SET KEY MALFUNCTION |
| B2140 | MIRROR UP SWITCH MALFUNCTION |
| B2141 | MIRROR DOWN SWITCH MALFUNCTION |
| B2142 | MIRROR LEFT SWITCH MALFUNCTION |
| B2143 | MIRROR RIGHT SWITCH MALFUNCTION |
| B2144 | DRIVER MIRROR VERTICAL SENSOR SHORT TO GROUND |
| B2145 | DRIVER MIRROR VERTICAL SENSOR SHORT TO BATTERY |
| B2146 | DRIVER MIRROR HORIZONTAL SENSOR SHORT TO GROUND |
| B2147 | DRIVER MIRROR HORIZONTAL SENSOR SHORT TO BATTERY |
| B2148 | PASSENGER MIRROR VERTICAL SENSOR SHORT TO GROUND |
| B2149 | PASSENGER MIRROR VERTICAL SENSOR SHORT TO BATTERY |
| B2150 | PASSENGER MIRROR HORIZONTAL SENSOR SHORT TO GROUND |
| B2151 | PASSENGER MIRROR HORIZONTAL SENSOR SHORT TO BATTERY |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.