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P046 Code


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P046 (E046) .................................. Right to Left Bank Fueling Difference

Check for a leaky injector

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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P046 (E046) .................................. Right to Left Bank Fueling Difference

Check for a leaky injector

How would you go about checking for a leaky injector.

Thanks for the quick response, I'll have to check that out as soon as I get a warm day. Will that also

cause a low idle? I had the car sitting for a month.

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Besides slow, is the idle rough? I suppose it could be a clogged injector instead of a leaky injector that is causing the imbalance, and a clogged injector would cause a slow idle

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Yes its a little rough, that's why I originally changed the fuel filter. Is it easy to take out and clean the injectors,

if I had to.

Because the engine sat for a bit maybe your injectors became gumed up, try a bottle of Techron in a full tank of gas for the next few tanks of gas and see if that cleans the problem up

Use good 93 fuel for a few tanks preferrably Chevron that has techron in it also

You can not clean the injectors yourself, only by techron, they need professional cleaning

I hope other members chime in here to give other ideas as to what can cause this imbalance.

Members.....could a VACUUM leak at the injector o-ring cause this imbalance?, I know it will cause a misfire, but will it cause an FUEL imbalance?

This is a 95 Deville, 4.9, I see OBD1 lean codes associated with O2 sensors, dont see lean codes associated with banks like on our Northstars

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Yes its a little rough, that's why I originally changed the fuel filter. Is it easy to take out and clean the injectors,

if I had to.

Because the engine sat for a bit maybe your injectors became gumed up, try a bottle of Techron in a full tank of gas for the next few tanks of gas and see if that cleans the problem up

Use good 93 fuel for a few tanks preferrably Chevron that has techron in it also

You can not clean the injectors yourself, only by techron, they need professional cleaning

I hope other members chime in here to give other ideas as to what can cause this imbalance.

Members.....could a VACUUM leak at the injector o-ring cause this imbalance?, I know it will cause a misfire, but will it cause an FUEL imbalance?

This is a 95 Deville, 4.9, I see OBD1 lean codes associated with O2 sensors, dont see lean codes associated with banks like on our Northstars

If I had a bad fuel injector, would it display a different code other than P046.

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Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Mike, I may be wrong, but I take a "left to right bank fueling imbalance" on OBDI to be the same as

# P0170 - Fuel Trim Bank 1

# P0171 - Fuel Trim System Lean Bank 1

# P0172 - Fuel Trim System Rich Bank 1

# P0173 - Fuel Trim Bank 2

# P0174 - Fuel Trim System Lean Bank 2

# P0175 - Fuel Trim System Rich Bank 2

on OBDII. I assume that OBDII is a bit more refined and definitive than OBDI.

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Thanks for all the info, I'll try the TECHRON first, since that's the easiest, and it has been very cold

up here in NY.

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Tell me about it, I am on Long Island, NY

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Mike, I may be wrong, but I take a "left to right bank fueling imbalance" on OBDI to be the same as

# P0170 - Fuel Trim Bank 1

# P0171 - Fuel Trim System Lean Bank 1

# P0172 - Fuel Trim System Rich Bank 1

# P0173 - Fuel Trim Bank 2

# P0174 - Fuel Trim System Lean Bank 2

# P0175 - Fuel Trim System Rich Bank 2

on OBDII. I assume that OBDII is a bit more refined and definitive than OBDI.

Ok then yes, anything rich or lean that can create an inbalance will trigger that code, thanks Larry

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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