Error code problems

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Faulty Cranshaft Circuit A

2007 Toyota 4Runner Engine, manual 189000 miles
The check light comes on immediately after it is deleted using OBDII scanner.
Wor! from Sierra Leone 5 months ago  
WO

Check Engine lights

2000 Toyota 4Runner 2.4 l 4 cylinder 178000 miles
Misfire cylinder 1 P0304 and P0300 with rough idle. Replaced Spark Plug, ignition coil and Fuel injectors and still have the same error code. Additionally, I Clean IACV. Is this a mechanical or electrical issue?
Tols from United States 5 months ago  
TO

Runs eratic on start up

2000 Toyota 4Runner 238000 miles
Throws a p0171 code. Rus rough intermittantly
Sandy from United States 5 months ago  
SA

I have a code P0013 or P0031

2007 Toyota 4Runner 6 cyl. 258000 miles
I looked up the code and it said 02 sensor and or heat sensor? I would like to know where the 02 sensor locations and if it has 2 or 4 sensors. Some Youtube said it may have 4. I don't want to take it to a mechanic just to find out.
Debora from United States 8 months ago  
DE
2 reports 

Check engine light P0100

1998 Toyota 4Runner Third GEN 3.4 L six cylinder 305000 miles
Had check engine light P0170 for the mass airflow sensor so I went ahead and replaced it. And now getting P0100 which may be the ECM. But how can I tell?
Mehrdad from United States a year ago  
ME
2 reports 
Problems with a 4Runner? Share them
         Code P0170  (1)
         Code P0100  (1)
         Code P0013  (1)
         Code P0031  (1)
         Code P0171  (1)
         Code P0304  (1)
         Code P0300  (1)

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