Question about 2001 Toyota Sequoia
P0128 is coolant thermostat problem Question 1: if i change the thermostat will that fix that problem?.............
p0505 is Idle air contro system fault Question 2: where is this located and how do i fix it ?............
p126 is magnetic clutch circuit fault Question 3: is the same where is it located and what and how can i fix it ?..................
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Posted on Jan 02, 2017
There is a technical service bulletin to correct this condition. Replacement of the car's Electronic Control Unit (the computer) will cure this. Take it to a Toyota dealer and have them replace it for free.
Posted on Jun 09, 2009
It is not hard to change the sensor, it just screws into a threaded hole. The light will not go out immeditaly, after the sensor is replaced. It needs to go thru a drive cycle. Your best bet is to replace the sensor and get the code cleard by whoever scanned it for the 0031 code.
Posted on Jul 23, 2009
P0505 Idle Control System Malfunction
IACV or Idle Air Control Valve if equipped is malfunctioning.
P0420 Catalyst System Efficiency Below Threshold (Bank #1)
The Catalytic converter is not working up to par in Bank#1.
I think this will point you in the right direction..
Posted on Jul 16, 2010
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Feb 24, 2016 | Cars & Trucks
Mar 03, 2015 | 2000 Nissan Altima
Trouble Code: P0128
Trouble Code Conditions: DTC P0107, P0108, P0112, P0113, P0116-118, P0335, P0336, P0300-P0306, P0401, P0505, P1106-P1108, P1259 and P1519, engine running at road load for 10 minutes, and the PCM detected the ECT sensor input did not reach the correct closed loop value. Note: It is possible for this code to set if the engine is left running while the hood is open for an extended period in a warm climate.
Inspect for low coolant level or for an incorrect coolant mixtureCheck the operation of the thermostat (it may be stuck open)TSB 01-064 (9/11/01) contains a repair procedure for this code
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Take note of the blurb regarding NISSAN products below
A code P0128 may mean that one or more of the following has happened:
Past experience indicates that the most likely solution is to replace the thermostat. However here are some suggestions on troubleshooting and repairing a P0128 OBD-II code:
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