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 MANUALSVOLVO1993960 4D WAGON, AW30-43REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/CODESFAULT CODE TESTINGCODE 2-4-1 (EGR FLOW TOO LOW)
1993 Volvo 960 4D Wagon, AW30-43
Code 2-4-1 (EGR Flow Too Low)
1993 Volvo 960 4D Wagon, AW30-43SECTION Code 2-4-1 (EGR Flow Too Low)
- Enter test mode No. 3. See TEST MODE NO. 3 under RETRIEVING CODES. Turn ignition on. Press test button on diagnostic unit 3 times for more than one second each. Light should flash as EGR converter is activated. Turn ignition off.
- If EGR converter is not activated, measure resistance between pins No. 6 (Blue wire) and No. 15 (Red/Green wire). Resistance should be about 75-95 ohms. If resistance is not as specified, check wiring and connectors.
- Disconnect EGR converter connector, located next to power steering fluid reservoir. See Fig 1 . Remove wire directly opposite Black/White wire between pin No. 1 and control unit. Reconnect connector.
- Start engine, and run it until it reaches normal operating temperature. Touch loose lead to engine ground. If engine starts to run unevenly, EGR system is operating correctly.
RENDER: 1.0x
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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.