Truck will not start...it want to but goes tp fail safe mode....obdii codes 2111,2014,2135...it was running last new engine....new coolant sensor, new cam sensors,new plugs,.....

Read OBDII codes for direction. P0116, P0117, P0118 codes indicate an engine coolant temperature sensor circuit or sensor performance problem. Further testing is necessary to determine root cause i.e. broken wire or failed sensor.

A simple visual inspection of the coolant temperature sensor and sensor wiring may reveal the problem.

Correct reporting of engine temperature is necessary for the fuel management system to determine proper air/fuel mixture. Your sensor is reporting hot while engine cold which likely effects a lean air/fuel mix causing multiple cylinder misfires.

Probable Cause:-
Possible Causes Setting Conditions

• TP sensor connector is damaged (check pins for damage, and for moisture)
• TP sensor signal circuit is open or shorted to voltage
• TP sensor ground circuit is open
• TP sensor has failed
• TP sensor not mounted properly to the throttle body
• PCM has failed

Engine running; and the PCM detected the TP sensor indicated more than 4.60v (i.e., a throttle opening of 92.27%). Note: This trouble code may set due to an intermittent fault.

I’m happy to assist further over the phone at https://www.6ya.com/expert/uttamjeet_2f3adc18600f8ede

Hi Darla, your best bet is to go the dealer and get it checked up before it fails totaly. It has a fail safe for when the engine is sick it goes into 'limp home' mode. Hope that helps. Greg.

First of all never spay a MAF sensor with parts cleaner, you just damaged an expensive sensor, never touch the element with you fingers. You have done a lot of expensive part changing without stating your original problem. you have no recourse now Except to scan the OBDII stored fault history to see what happened and go from there When diagnosing driveabilty problems, start with the cheapest fixes first (OBDII scan free at Autozone)

Check fan relay. Remove passenger headlight, cut plastic to find relay. Replaced mine last night. Radiator fan spinning again. Was having temp spikes at start up and idling. Also bought coolant temp sensor but have not installed. Before I replaced fan relay, check engine light wasn't on. Now that the new relay is installed, light came on. Autozone and Discount Auto have an OBDII sensor you can borrow for free to read the codes stored on computer. Codes are generally stored when the check engine light comes on. Getting minr checked today. Will update solution later if needed. Relay was $55.

Sounds like you have a bad temp sensor and the computer is going into fail-safe mode causing the SES light to come on and the fans to run, if you have a scan tool check and see what the coolant temp reads.

This just happened to me. I drove the beetle in the snow and slid up to a stop sign. The slide engaged the anti-lock brakes. After that, the car was sluggish starting out and would not shift into 4th gear.
Turns out, the transmission was stuck in 3rd gear. If you can believe it, this is by design! It's a fail safe mode that gets triggered by the wheels spinning out of sync.
According to my mechanic there are wheel speed sensors on each wheel. If the computer senses the wheels moving at different speeds it will drop into fail safe mode. This requires a special scan tool to clear the codes.
Once the codes were cleared, ran like new.

It is running lean during cold start mode when the fuel is vaporizing fast enough to keep the engine running.

Either your cold start system is not operating, or your Mass Air Flow Sensor is coated with varnish and needs to be cleaned with carb cleaner. Your engine coolant temp sensor tells your engine computer what the temo of the engine is. The computer then tells the fuel injectors how much fuel to inject. When engine is cold, it injects more fuel to keep the engine running. So, it may be the coolant temp sensor. Autozone can run a computer scan for free and tell you what the fault codes are. However, if the coolant sensor fails to always reading warm engine, the scan may not get a fault code for that.
A coolant sensor should be about $75, cheaper on ebay. Report back on codes and progress.

P2074-manifold Pressure/throttle Position Correlation

CORRELATION - HIGH FLOW/VACUUM LEAK

When Monitored: Engine Running, during all drive modes.
Set Condition: If vacuum drops below 1.5 Hg with engine RPM greater than 2000 RPM
at closed throttle.

POSSIBLE CAUSES

VACUUM LEAK
HIGH RESISTANCE IN MAP (K7) 5 VOLT SUPPLY CIRCUIT
RESISTANCE TO GROUND IN MAP (K7) 5 VOLT SUPPLY CIRCUIT
MAP SENSOR
HIGH RESISTANCE IN (K1) MAP SIGNAL CIRCUIT
RESISTANCE TO GROUND IN (K1) MAP SIGNAL CIRCUIT
HIGH RESISTANCE IN (K4) MAP GROUND CIRCUIT
PCM
TP SENSOR OPERATION
HIGH RESISTANCE IN (K6) TP SENSOR 5 VOLT SUPPLY CIRCUIT
RESISTANCE TO GROUND IN (K6) TP SENSOR 5 VOLT SUPPLY CIRCUIT
TP SENSOR
HIGH RESISTANCE IN (K22) TP SIGNAL CIRCUIT
RESISTANCE TO GROUND IN (K22) TP SENSOR SIGNAL CIRCUIT
HIGH RESISTANCE IN TP (K4) SENSOR GROUND CIRCUIT

obdII P1123 is a error refer to Air/fuel controller
OBDII P1123 Fuel Trim Additive, System Too Rich


the obdII P1123 is a error refer to Air/fuel controller


OBDII P1123 Fuel Trim Additive, System Too Rich

the following info is a copy/paste of HMA service:


PRIMARY COMPONENT:

Air/Fuel Control System

SECONDARY SENSOR(S):

Mass Air Flow (MAF) Sensor
Throttle Position (TP) Sensor
Intake Air Temperature (IAT) Sensor
Engine Coolant Temperature (ECT) Sensor
Oxygen Sensors

FAILURE CONDITIONS

If the air/fuel mixture at idle is too rich for more than 30 seconds during two back-to-back trips, this code will be set and the Malfunction Indicator Light (MIL) will be turned on.

Details:


The code will be triggered if the following conditions are met:

Long term fuel trim value (additive) is less than -0.75 ms (-15% to -20%) for 30 seconds or more
Engine speed is less than 880 RPM (1000 RPM, 2.0L Tiburon)
Mass air flow rate is less than 6.1 g/s (7.5 g/s, 2.0L Tiburon)
Engine coolant temperature is greater than 158°F (70°C) [176°F (80°C), Accent]
Engine in closed loop operation
No canister purge occurring