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 MANUALSVOLVO1991240 L4-2.3L SOHC VIN 88 B230FREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTHROTTLE POSITION SWITCHTESTING AND INSPECTIONTP SWITCH SIGNAL FAULTY AT FULL LOAD
1991 Volvo 240 L4-2.3L SOHC VIN 88 B230F
TP Switch Signal Faulty At Full Load
1991 Volvo 240 L4-2.3L SOHC VIN 88 B230FSECTION TP Switch Signal Faulty At Full Load
EK. DIAGNOSTIC TROUBLE CODE (DTC) 2-1-3 MFI LH 2.4
2-1-3 Throttle position (TP) switch signal faulty at full load position
DTC conditions:
The TP switch indicates full load but the control module receives a load signal that is too low to be full load. The DTC will be logged unless the engine is in starting or limp home modes.
Causes Of Fault:
Grounding in the wiring to the control module. The full load switch is not breaking.
Fault symptoms:
Normally no fault symptoms.
EK1
Checking The Power Supply
-Disconnect the TP switch.
-Ignition on.
Connect a voltmeter between terminals 3 and 2 (GND) on the connector.
The voltmeter should read approx. 12 V.
It this value is OK:
-Check the TP switch EK2.
IF the reading Is Incorrect:
-Check the wiring and connections for grounding.
EK2
Checking the throttle position (TP) switch
-Ignition off.
Connect an ohr.1meter between terminals 18 and 3 on the TP switch.
The ohmmeter should read infinite resistance.
If this value is OK:
Intermittent fault.
-Check the connections for loose contacts.
If the reading is incorrect:
-Try using a new TP switch.
RENDER: 1.0x
NO RELATED
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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.