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In the driver's side back corner of the engine compartment is a little black box with a test lead attached. Open the box, place the test lead into socket #2 and press the button for 1 second. The codes will then flash on the red LED light.
If your check engine light is on, the codes may be:
112 Fault in ECU
113 Fault in Fuel injectors
121 Fault in Air Mass Meter
123 Fault in Coolant Temp Sensor
212 Fault in O2 Sensor
221 Extremely rich or Lean at cruise
If Check Engine Light is not on:
111 No Fault
131 RPM signal missing
132 Battery Voltage low or high
223 Fault in air control valve signal
231 Rich or Lean at cruise
232 Rich or Lean at Idle
233 Air Control Valve closed due to leak
311 Speed Signal missing
312 Anti-knock signal missing
What else can I help you with?
1990 Volvo 240 timing belt marks?
how do adjust timing belt on a volvo 240 DL ?
What is the bolt pattern for a 1990 Volvo 240?
5x108mm
Can you replace the taillight lens of a 1990 Volvo 240 with one from a 1984 Volvo 240?
If they're identical, yes. Try it and find out.
Alternator wiring 1993 Volvo 240?
how can i repair a wirie taht has been broken from alternator to wiring harness on 1990 volvo 240?
Will same battery fit a 1990 Volvo 240 dl sedan as a 2002 Volvo cross country wagon?
no
Where is the oil pan on a 1990 Volvo 240?
The oil pan is bolted to the bottom of the engine
There is no cable going to the cluster in a 1990 240 Volvo dl?
That's correct it's electronic.
Where is the Obd1 hookup on a 1990 Volvo 240 dl?
Under the hood by the left hood hinge.
What is the firing order for 1990 Volvo 240?
1 - 3 - 4 - 2 The distributor rotor turns CLOCKWISE
Firing order for 1990 Volvo 240?
1 - 3 - 4 - 2 The distributor rotor turns CLOCKWISE
What is the towing capacity of a 1990 Volvo 240?
My manual says 3500lbs with a 300lb tongue weight. I personally wouldn't tow anything over 2500 lbs with a 240.
What causes alternator not to charge 1990 Volvo 240?
Worn brushes, bad Regulator, or Likely a bad connection or wiring.
