740 & 760 Lambda light

BJ (@wdj) · April 9

Help please can anyone tell me which pins I Cross connect to remove the code for the lambda light in my 1990 740. Have fixed the exhaust system leak but even after disconnecting the battery and re connecting the bloody thing comes back on. Don't have any fancy code reading boxes unfortunately. Bill

bgpzfm142 (@bgpzfm142) · April 9

If it's a factory LH 2.4 system, you should have the diagnostic box on the LH side of the engine bay, near the LH strut tower. It's not fancy like a hand-held OBD code reader. The diagnostic box is just a LED and a jumper, but it does the job.

See the 700 / 900 FAQ for how the read and clear codes with it.

https://www.volvoclub.org.uk/faq/EngineOBDCodes.html

BJ (@wdj) · April 11

Thanks. The site is amazing.

740 & 760 Lambda light

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