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What is code p042 on a 94 chevy lumina

Just trying to understand code

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Code po741what coul be

The best way I have found to understand these codes is to go to OBD CODES.COM These are very helpful in explaining the codes for you to understand them. It is a trouble code which sometimes is also associated with po740,po742 which is a generic obd2 powertrain code.The information from the above mentioned site is written by a master certified technician. I hope this helps you. P0741 Torque Converter Clutch Circuit Performance or Stuck Off

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Check lights have been on all vehicles for over 30 years,
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& professional test equipment to proceed

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Have you fixed the issues that involved the codes ? What were the codes ?

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Codes p 0442 and p 0455

this obd2 trouble code table can help you understand the meaning of code, for these codes, you can try,
Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.
Otherwise, replace the gas cap, or
Inspect the EVAP system for cuts/holes in tubes/hoses.

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this obd2 trouble code table can help you understand the meaning of code.
and for your code, I think you can try to change the whole sending unit with the fuel pump in the tank. And see if the code come back.

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this obd2 trouble code table can help you understand the meaning of code, for this code, you can try:
Check the resistance of the knock sensor on bank 2 (compare it to factory specs)
Check for broken/frayed wires leading to the sensor
Replace the knock sensor on bank 2

Sep 07, 2011 | 1996 Toyota Tacoma

1 Answer

I Have a code that i got from a reader. (PO420) I don't know what this is

this obd2 trouble code can help you understand the meaning of code...
for this code you can try:

Check for exhaust leaks at the manifold, pipes, catalytic converter. Repair as required.

Use a scope to diagnose the oxygen sensor operation (Tip: The oxygen sensor in front of the catalytic converter normally has a fluctuating waveform. The waveform of the sensor behind the converter should be more steady).

Inspect the downstream heated oxygen sensor (HO2), replace if necessary

Replace the catalytic converter

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this obd2 trouble code table can help you understand the meaning of code.

for p0736, try:
Start by inspecting the transmission fluid level and condition, and change fluid if necessary.

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