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 MANUALSVOLVO2004S80 L6-2.9L TURBO VIN 91 B6294TREPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONMANUFACTURER CODE CHARTSECM CODES (ENGINE CONTROL MODULE)ECM-6800SIGNAL TOO HIGH. INTERMITTENT FAULT
2004 Volvo S80 L6-2.9L Turbo VIN 91 B6294T
Signal Too High. Intermittent Fault
2004 Volvo S80 L6-2.9L Turbo VIN 91 B6294TSECTION Signal Too High. Intermittent Fault
Signal too high. Intermittent fault
Checking component and wiring
Check cables between engine control module (ECM) #A38 (#A38) and turbocharger (TC) control valve #2 for an intermittent short-circuit to supply voltage according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Remedy as necessary
Other information
- To connect the breakout box, see Connecting the breakout box, B5254T2 Connecting the Test Box.
- To access/replace the turbocharger (TC) control valve, see Replacing the turbocharger (TC) control valve, B5254T2 Replacing the Turbocharger (TC) Control Valve.
- For information about signals on 5-cylinder engines, see Signal specification Signal Specification.
- For information about signals on 6-cylinder engines, see Signal specification Signal Specification.
- Turbocharger (TC) control valve terminal 1 has Ubat power supply from the system relay.
Continue - Fault-tracing information
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Fault-tracing information
Information
Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).
Do you want to view the information again?
Yes - Attempt New Test
No - Exit fault-tracing
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Attempt New Test - Checking component and wiring
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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.