Car randomly died & code P0021 - HELP :(

SouthArk370Z · 09-12-2020, 09:11 PM

Quote:

Originally Posted by gor

When we charge the battery it won’t start. Left it for a while and still wont turn on. Plus that wouldn’t explain the P0021 code.

Try jump starting or using a known good battery.

A bad battery can cause all sorts of bogus PIDs.

Ghostvette · 09-16-2020, 01:50 PM

Quote:

Originally Posted by jchammond

Just listened to both, doesn’t sound good & if your battery isn’t weak...sounds like it’s trying to lock up or hydra-lock

Quote:

Originally Posted by SouthArk370Z

The ticking sounds like something coming in contact with a light weight metal part (eg, a shield). Check belt path and other moving parts.

When you try to start, that sounds like a weak battery to me. The battery appears to take a charge (shows good volts) and may power some accessories but cannot maintain the current flow required to turn the engine over.

Quote:

Originally Posted by SouthArk370Z

Try jump starting or using a known good battery.

A bad battery can cause all sorts of bogus PIDs.

A great rule of thumb... if the current battery is more than 3 years old, replace it. While some people have gotten great battery life out of a battery, they are the exception and not the rule. It sounds to me like a bad battery, like South Ark said. After you get the car running, verify alternator output voltage per the FSM (link in my sig & in South Ark's). I would replace serpentine belt, tensioner & all idler pulleys. Good luck.

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