Spia anomalia "Service Engine Soon"

[Guest]

Salve a tutti, possiedo un Chevrolet C 1500 del 1988 con motore V8 305...da qualche tempo ho notato che dopo alcuni miniti dall' avviamento del motore, mi si accende la spia arancione di anomalia che indica "SERVICE ENGINE SOON" ....cosa pu? essere successo? come posso risolvere il problema? .....qualcuno mi pu? aiutare?....Grazie!!!!

[Guest]

GM 1983-95 vehicles OBD1 codes self-retrieval





As the name implies, you can get the codes for GM cars or trucks yourself if the model of your vehicle is made before 1995, this means as soon as you see ?check engine light? in your dash, you can get the code in minutes if you want.



Shown on the left is a picture of the connector where you get the GM OBD1 code.



When you find the adapter connector, use a jumper wire (see red wire above) and connect terminals A and B. Next turn your key on but don't start. Watch your check engine flash the code/s.



EXAMPLE: CODE 12: one long flash and two short flashesCODE 13: one long flash and 3 short flashes.



Note: code 12 is usually the first code you get and just ignore it.Watch the code after code 12, that's what you need.



GM common codes for OBD1 (for vehicles made before 1995)

12 System normal

13 oxygen sensor circuit open

14 coolant sensor high resistance or shorted

15 coolant sensor circuit low or open

16 direct ignition system (DIS) fault in circuit

17 cam position sensor fault

18 crank or cam sensor error

19 crank sensor circuit fault

21 tps sensor out of range

22 tps sensor signal voltage low

23 intake air temp sensor out of range, low

24 vehicle speed (vss) sensor circuit fault

25 air temp sensor sensor out of range, high

26 quad-driver module (computer) circuit #1 fault

27 quad-driver module (computer) 2nd gear circuit

28 quad-driver module (computer) circuit #2 fault

29 quad driver module (computer) 4th gear circuit

31 cam position sensor fault

32 egr circuit fault

33 map sensor signal out of range, high

34 map sensor signal out of range, low

35 idle air control sensor circuit fault

36 ignition system circuit error

38 brake input circuit fault

39 clutch input circuit fault

41 cam sensor circuit fault, igntion control circuit fault

42 electronic spark timing (EST) circuit grounded

43 knock sensor

or electronic spark control circuit fault

44 oxygen sensor lean exhaust

45 oxygen sensor rich exhaust

46 pass-key II circuit or ps.pressure switch circuit fault

47 pcm-bcm data circuit

48 misfire diagnosis

51 calibration error, mem-cal, ecm or eeprom failure

52 engine oil temperature circuit, low temperature indicated

53 battery voltage error or egr or pass-key II circuit

54 egr system failure or fuel pump circuit low voltage

55 a/d converter error or pcm not grounded or lean fuel or frounded reference voltage

56 quad-driver module #2 circuit

57 boost control problem

58 vehicle anti-theft system fuel enable circuit

61 a/c system performance or degraded oxygen sensor signal

62 engine oil temperature high temperature indicated

63 oxygen sensor right side circuit open or map sensor out of range

64 oxygen sensor right side lean exhaust indicated

65 oxygen sensor right side rich exhaust indicated

66 a/c pressure sensor circuit low pressure

67 a/c pressure sensor circuit or a/c clutch circuit failure

68 a/c compressor relay circuit failure

69 a/c clutch circuit head pressure high

70 a/c refrigerant pressure circuit high

71 a/c evaporator temperature sensor circuit low

72 gear selector switch circuit

73 a/c evaporator temperature circuit high

75 digital egr #1 solenoid error

76 digital egr #2 solenoid error

77 digital egr #3 solenoid error

79 vehicle speed sensor (vss) circuit signal high

80 vehicle speed sensor (vss) circuit signal low

81 brake input circuit fault

82 ignition control (IC) 3X signal error

85 prom error

86 analog/digital ecm error

87 eeprom error

99 power management

[mopar]

Benvenuto a te, e grazie per le presentazioni.....

[Sunnybob]

[quote name='Diego_79' post='305941' date='30/8/2010, 21:04'].....qualcuno mi pu? aiutare?....Grazie!!!![/quote]



togli la lampadina alla spia...

[il newyorkese]

? quasi ora di fare il tagliando

[lanbian]

[quote name='il newyorkese' post='306142' date='1/9/2010, 10:36']? quasi ora di fare il tagliando[/quote]

ANCHE A ME SUCCEDE LO STESSO PROBLEMA CON MOTORE E TUTTO NUOVO,SI PUO' SAPERE QUALCHE COSA IN ITALIANO.GRAZIE A TUTTI...

[Nuvolari]

che c'? da urlare? hai il manuale d'officina?

[towman]

[quote name='il newyorkese' post='306142' date='1/9/2010, 10:36']? quasi ora di fare il tagliando[/quote]

Assolutamente NO, c'? una anomalia nell'inizione motore.

[towman]

[quote name='lanbian' post='393505' date='7/12/2011, 16:26'][quote name='il newyorkese' post='306142' date='1/9/2010, 10:36']? quasi ora di fare il tagliando[/quote]

ANCHE A ME SUCCEDE LO STESSO PROBLEMA CON MOTORE E TUTTO NUOVO,SI PUO' SAPERE QUALCHE COSA IN ITALIANO.GRAZIE A TUTTI...

[/quote]



Ma scusa tu non hai estirpato l'iniezione per montare un carburatore?

[Guest]

si , infatti ha un Holley se non ricordo male e uno spinterogeno con accensione Msd.

[lanbian]

[quote name='JimmyShine' post='393512' date='7/12/2011, 16:39']si , infatti ha un Holley se non ricordo male e uno spinterogeno con accensione Msd.[/quote]

Ho un holley con centralina msd,ma quando metto in moto compare sempre la spia,ciao Marco,e' tutto a posto tranne che la spia,e se ho urlato mi dispiace e a towman se vieni dalle parti di Roma mi farebbe piacere incontrarti,Saluti....

[Guest]

tutti i sensori sono stati allegramente tagliati, non si potra' risalire al codice in centralina ....dato che la centralina non esiste piu'...

io non mi preoccuperei...e toglierei via la luce..