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.
2003 Volvo XC90 Base, FWDFACTORY OEM SERVICE PROCEDURE
Accessory Electronic Module (AEM) DTCS
ACCESSORY ELECTRONIC MODULE (AEM) - DTC INDEX
| DTC | Description |
|---|---|
| AEM-1A01 | Power supply. Signal too low. Intermittent fault |
| AEM-1D01 | Control module. Internal fault. Intermittent fault |
| AEM-1D02 | Control module, software. Internal fault. Intermittent fault |
| AEM-1D03 | Control module not fully programmed. Internal fault. Intermittent fault |
| AEM-1D07 | Control module. Internal fault. Intermittent fault |
| AEM-1D08 | Control module. Internal fault. Intermittent fault |
| AEM-1D0A | Control module. Internal fault. Intermittent fault |
| AEM-5F10 | Relay, engine block heater. Signal too low. Intermittent fault |
| AEM-5F11 | Relay, engine block heater. Signal too high or Signal missing. Intermittent fault |
| AEM-6C50 | Alarm output P0. Signal too low or signal missing. Intermittent fault |
| AEM-6C51 | Alarm output P0. Signal too high. Intermittent fault |
| AEM-6C52 | Alarm output P1. Signal too low or signal missing. Intermittent fault |
| AEM-6C53 | Alarm output P1. Signal too high. Intermittent fault |
| AEM-6C54 | Alarm output S0. Signal too low or signal missing. Intermittent fault |
| AEM-6C55 | Alarm output S0. Signal too high. Intermittent fault |
| AEM-6C56 | Alarm output S1. Signal too low. Intermittent fault |
| AEM-6C57 | Alarm output S1. Signal too high or Signal missing. Intermittent fault |
| AEM-7A10 | Carphone mute signal. Signal too low. Intermittent fault |
| AEM-7A11 | Carphone mute signal. Signal too high or Signal missing. Intermittent fault |
| AEM-E001 | Control module communication. Faulty communication |
| AEM-E003 | Configuration fault. Faulty configuration |
| AEM-XXXX | Unknown diagnostic trouble code (DTC) for the current control module version |
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.
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