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Diagnostic Codes And How To Read Them

volvo diagnostic codes

We in the 850 family who have 1996 and 1997 model years have it easy. Check Engine light comes on? We just plug in our diagnostic code readers and a magical system called OBD-II tells us what code(s) are causing the CE light. Same with 1998 model year Volvos, like S70, V70 and XC70 models. Then after that, codes expanded from the OBD-II to include Volvo-specific diagnostic codes that OBD-II readers cannot retrieve, although many overlap in meaning.

How To Read Diagnostic Codes

To start, the Ignition key must be in position II, engine not running. Open the hood. Locate the two diagnostic sockets just inboard of the washer fill cap. The “A” connector has a jumper that is stored in the lid of the “A” diagnostic connector. The jumper is used for both diagnostic connectors.

Diagnostic Codes And How To Read Them


I have 03 Volvo S60. It is 114,000 miles
What is the code for

Please let me know what do I have to do to fix it.



Evamarie Mittler says:

my check engine light came on due to no gascap.I replaced it and reset the code. however its been 1100 miles since and it still wont pass inspection. The computer says its not ready. the codes are: catalyst (G)/NMHC Catalyst (D)
o2 sensor (G) Exhaust gas sensor(D)
please reply so i know what i have to do to fix this problem and get it inspected.
My car is a 2001 s80 t6.
thank you,
Evamarie Mittler

What scanner is available for a 1997 volvo s70.
Am desparate to purchase a suitable code reader.

Thanks in advance.

rich dubee says:

need to get the engine codes for a 1995 volvo 940

marry renda says:

Volvo S70 GLT 1998 has the following codes, but runs excellent: 00304, 0305, 0300,0455, 0410, 0400

i have a volvo 2000 s70. can anyone tell me what codes P1171 and P 1550 indicate? Thanks

I am need read code volvo truck

David D Stubbs says:

The local dealership reported codes like “EFI-212,” “EFI-153,” and
“Air Pump Codes-448, 442.” While I’m probably making a rookie mistake, I am not finding any relationship between these and the OBD2 P/B/C/U codes. Would you be able to send me a clue? Thanks very much!



Danny Chambers says:

I have a Volvo S40 2001 model with code errors; CODE001: P1500 (0, 9,15,0). CODE002: P0335. CODE 003: P0722..
Can anyone help and how to fix them.
Thank You

does anyone know code PO455?

On a 1999 Volvo V70 non-turbo I get a P1081 code that actron does not list. Do you know what that might be? What is the fix?


ajalilaghi says:

hi how to read the diagnoistic code in volvo fh 12
such as mid128sid256… so on

hi i have a 2005 volvo v70 it has the trouble code p2188 can anyone tell me what that means and how to fix it Thank you

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