need help with codes
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Joined: Jun 2011
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From: Avondale, La.
need help with codes
I have a 1990 ford f150 4.9 and yesterday I had the cats removed because of them rattling inside. It is now throwing three codes 33,41,and 49. Could this all be from no cats. Does anyone have any Idea what I should check, It runs fine just the check engine light is coming on now.
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From: Omaha Nebraska
33=ALL - EGR did not open/ respond during test or if memory code, did not open intermittently - EVP EVR PFE
41=System lean - Fuel control
49=Electronic Ignition - spout signal circuit problem - Ignition Systems
Code 41 could either be a bad O2 or a vacuum leak. Assuming you didn't eliminate it.
41=System lean - Fuel control
49=Electronic Ignition - spout signal circuit problem - Ignition Systems
Code 41 could either be a bad O2 or a vacuum leak. Assuming you didn't eliminate it.
Last edited by Beatertruck; Nov 10, 2011 at 09:12 AM.
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From: North Carolina
SO 2 of those codes don't seem related.
33 is EGR not cycling, pull the valve and clean it out really well. Make sure the vacuum line running to the valve is still well sealed too.
49 is SPOUT signal default to 10 degrees BTDC. Not sure what causes that but I'm thinking check for anything weird about the wiring around the spout connector and the TDI thing on the distributor. Maybe the spout is missing?
41 is a HEGO code -- so O2. If you only had one O2 sensor to start with and the welder didn't remove the sensor then you should be good. If you had one and he removed it then that's definitely the problem. You don't need to reinstall the cat (if you only had 1 sensor) but you definitely do need the HEGO. It's my understanding that removing just the cat will only cause problems if you have 2 sensors because one is a post cat sensor and will start to tell the truck that the cat isn't doing its job.
33 is EGR not cycling, pull the valve and clean it out really well. Make sure the vacuum line running to the valve is still well sealed too.
49 is SPOUT signal default to 10 degrees BTDC. Not sure what causes that but I'm thinking check for anything weird about the wiring around the spout connector and the TDI thing on the distributor. Maybe the spout is missing?
41 is a HEGO code -- so O2. If you only had one O2 sensor to start with and the welder didn't remove the sensor then you should be good. If you had one and he removed it then that's definitely the problem. You don't need to reinstall the cat (if you only had 1 sensor) but you definitely do need the HEGO. It's my understanding that removing just the cat will only cause problems if you have 2 sensors because one is a post cat sensor and will start to tell the truck that the cat isn't doing its job.