I have a code p0171 on my 1992 Toyota Camry 2.2L

Question

I had a smog check on my 92 Camry and my reading was ASM emission test read at 15mph2983 and for 25mph3036 and a reading on the engine light being on was p0171

Answer 1

start by replacing the spark plugs and wires/cap and rotor if you have not done so, check for intake leaks, and pcv hoses. try to clean the mass air flow sensor with mass air flow sensor cleaner.

fill up with 91 octane gas from shell or chevron and use a good fuel system cleaner additive

 

Possible causes

- Intake air leaks
- Faulty front heated oxygen sensor
- Ignition misfiring
- Faulty fuel injectors
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Faulty Mass Air Flow (MAF) sensor
- Incorrect Positive Crankcase Ventilation (PCV) hose connection

Answer 2

P0171 Toyota Code - Fuel Trim System Too Lean Bank 1
Read more: https://www.autocodes.com/p0171_toyota.html