How to fix fault p0021 and engine failsafe program

Connect it to a professional grade scan tool computer.

Sometimes the engine failsafe mode is triggered due to a sensor failure or an electrical glitch. It's also common for a security system fault to engage this warning light, which means it's not always a mechanical issue that's causing the failsafe.
Oct 31, 2018

What is the Engine Failsafe Mode? ' YourMechanic Advice

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Vehicle Engine Failsafe Mode Explained and How to Reset it

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In most cases, the check engine light will turn ON as the engine switches to failsafe mode. But having a check engine light does not ...
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‎What is the engine failsafe... · ‎Fail-Safe mode isn't always...

Can be an automatic transmission not working properly check the fluid level disconnect battery for 1 /2 hour.

Your car is due for an oil change.

Your fault code I think is a cam shaft sensor fault Depending on what engine u got it could be the sensor wiring or the timing is out . If u got a v engine u should have p0011 as well that would prob be timing out hope it has helped

code p0021 refers to camshaft position (CMP) intake /left /front, bank 2 timing over advanced/system performance===causes --valve timing--engine mechanical fault--CMP actuator. Check /replace the advance mechanism at the end of the cam shaft at the chain/belt

hi
my car " landrove discovery 3 "give me two message " engine failsafe, suspension inactived, what can I do??? cause his don't starting

Hi there:P0021 - "A" Camshaft Position - Timing Over-Advanced or System Performance (Bank 2)

A code P0021 refers to the VVT (variable valve timing) or VCT (variable camshaft timing) components and the car's PCM (powertrain control module, also called an ECM). That consists of a few different components but the P0021 DTC specifically refers to the camshaft (cam) timing. In this case, if the cam timing is above a set limit (over-advanced), the engine light will be illluminated and the code will be set. The "A" camshaft is either the intake, left, or front camshaft. A P0021 engine code is basically the same as a P0011 code, except this is for Bank 2, not Bank 1.

Most likely a P0021 DTC will result in one of the following: hard starting, poor idle, and/or stalling. There are potentially other symptoms as well. Of course, when trouble codes are set, the MIL (malfunction indicator lamp, a.k.a. the check engine light) illuminates.


A P0021 DTC trouble code may be caused by one or more of the following:Incorrect camshaft timingWiring problems (harness/wiring) in intake timing control valve control solenoid systemContinuous oil flow to VCT piston chamberFailed timing valve control solenoid (stuck open)

Possible Solutions:This DTC code is a result of a mechanical fault of the VCT unit or related components, so there is no need for electrical diagnosis. Refer to vehicle specific repair manual to perform component tests for the VCT unit. Notes: Dealer techs have advanced tools and the ability to follow detailed troubleshooting steps, including the ability to test components using a scan tool.To reset the fuel pump, press the button on the switch. The switch is located immediately below the hole in the trunk side trim.

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another one this is a common fault this failsafe mode ,just disconnect the battery and join the leads together to clear the fault

try disconecting the battery for 5 mins see if it reeboots computer.

The failsafe mode can appear following numerous faults being detected - some faults can be momentary and register but not cause a problem. These are normally reset by just turning ignition off/on. get the fault code memory read at a garage and this may give you a clue as to a possible problem developing. Failsafe mode will give you reduced engine performance but will allow you to drive for normally some distance. If a serious problem developes your car message centre will tell you to shut off the engine or it will shut it down.
good luck.