P0235 refuses to die
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P0235 refuses to die
P0325 refuses to die . . .
Car is an 01 Accord, LX with about 125K on it. It is my grocery getter. Bought it from an estate in 2003 with 22K on it from a little old lady who didn't drive it much - but she bumped into things. (I know this because I was the executor of her estate).
Properly maintained since, regular oil changes, filters, brake pads, (several window winders), new motor mounts, new radiator and hoses, new PS pump, A/C repaired (compressor failed), VTEC solenoid replaced (leaked), distributor seal replaced (AutoZone said I needed a new distributor, $500, it was a 50 cent seal which I changed myself), new plugs and wires, everything written down. Clear coat failed, the car looks like it has leprosy, that can wait.
Car laid down a smokescreen like a WW2 destroyer - big clouds of white smoke. Everyone said head gasket but nobody (including me) thought to do a compression test. Head gasket changed, more white smoke, turned out to be the warmup regulator on the back of the head. Kinda hard to get to, now I know the inspiration for the Kama Sutra.
Replaced warmup regulator, the car wasn't driven between the time the head was reinstalled and the regulator was replaced - that's important.
CEL came on, P0325 knock sensor. Mechanic has now replaced the knock sensor FOUR times to no avail. I finally convinced him that the sensor (all four of them) is telling the truth, there IS something wrong, and it isn't a defective sensor. ("Oil pressure gauge shows zero, we can't be out of oil, it must be the gauge." Nope.)
Replaced the wire between the firewall plug and the knock sensor, no change, light still comes on. Clear the code, light still comes on.
Checked that the timing belt marks are correct - they are. (When I had the belt changed at about 80K, it was one tooth off, the CEL promptly came on. Corrected the belt, cleared code, light stayed off.)
I doubt the ECU has failed, this problem only arose immediately after the head gasket was changed.
It runs quite well, but is getting something like 10 mpg, so I really think it needs to be fixed. (Then I promise I'll paint it - honest.)
I am now out of altitude, airspeed and ideas. I don't want to take it to an authorized Honda dealer because I don't want to get a second mortgage. I absolutely can fix this myself but I absolutely don't know what I am looking for at this point. All the "usual suspects" are accounted for - unless I'm missing something.
Ideas? Exorcist? Bonfire? Sell it to Elon and let him send it to Mars? (And have the Martians attack us in revenge?) I can't even tear my hair out in frustration because I am already bald.
Best Regards,
Mike/Florida
Car is an 01 Accord, LX with about 125K on it. It is my grocery getter. Bought it from an estate in 2003 with 22K on it from a little old lady who didn't drive it much - but she bumped into things. (I know this because I was the executor of her estate).
Properly maintained since, regular oil changes, filters, brake pads, (several window winders), new motor mounts, new radiator and hoses, new PS pump, A/C repaired (compressor failed), VTEC solenoid replaced (leaked), distributor seal replaced (AutoZone said I needed a new distributor, $500, it was a 50 cent seal which I changed myself), new plugs and wires, everything written down. Clear coat failed, the car looks like it has leprosy, that can wait.
Car laid down a smokescreen like a WW2 destroyer - big clouds of white smoke. Everyone said head gasket but nobody (including me) thought to do a compression test. Head gasket changed, more white smoke, turned out to be the warmup regulator on the back of the head. Kinda hard to get to, now I know the inspiration for the Kama Sutra.
Replaced warmup regulator, the car wasn't driven between the time the head was reinstalled and the regulator was replaced - that's important.
CEL came on, P0325 knock sensor. Mechanic has now replaced the knock sensor FOUR times to no avail. I finally convinced him that the sensor (all four of them) is telling the truth, there IS something wrong, and it isn't a defective sensor. ("Oil pressure gauge shows zero, we can't be out of oil, it must be the gauge." Nope.)
Replaced the wire between the firewall plug and the knock sensor, no change, light still comes on. Clear the code, light still comes on.
Checked that the timing belt marks are correct - they are. (When I had the belt changed at about 80K, it was one tooth off, the CEL promptly came on. Corrected the belt, cleared code, light stayed off.)
I doubt the ECU has failed, this problem only arose immediately after the head gasket was changed.
It runs quite well, but is getting something like 10 mpg, so I really think it needs to be fixed. (Then I promise I'll paint it - honest.)
I am now out of altitude, airspeed and ideas. I don't want to take it to an authorized Honda dealer because I don't want to get a second mortgage. I absolutely can fix this myself but I absolutely don't know what I am looking for at this point. All the "usual suspects" are accounted for - unless I'm missing something.
Ideas? Exorcist? Bonfire? Sell it to Elon and let him send it to Mars? (And have the Martians attack us in revenge?) I can't even tear my hair out in frustration because I am already bald.
Best Regards,
Mike/Florida
Last edited by Go4car; Mar 14, 2025 at 03:48 PM.
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