My honda accord 98 LX 4 Cyl 2.3 L have 91000 miles on it. It is showing error code P0420, so i took it to do the engine tune up, and i changed the spark plugs and did engine flush etc, after that the reading light again came on, and this time mechanic asked me to change the oxygen sensor, but the wishy-washy again came on, so he again replaced the new sensor next to my old sensor and refunded the money for alien sensor, but now he is saying something may be wrong beside catalytic convertor, and only if it genuine honda, solitary then the code will go, otherwise the code will be at hand, so please give me some advice almost it, and he also told me if your car is running fine i dont have to verbs about it, but i want my car to be watertight, i dont like that engine light on, adjectives the time, please give me a advice, will unpromising catalytic converter hurt my car..
The car have 2 O2 sensors, one at the engine, and one at the rear of the cat. Which one did he change?
There are test that we run to determine the cause of the code.
If the Cat is tested and found to within spec, afterwards we replace the rear sensor.
Find a shop that specializes in power-train supervision, preferably one that is EMISSIONS savy, like a licensed testing and repair Smog-Check shop.
Look for a shop that displays the ASE symbol.
I have a 91 honda concurrence ex and my engine light is on all the time... we took it to the shop and apparently at hand was nothing wrong beside it. So im not sure. Hope you get it the way u want!
Answers: Did they tell you if here were any other codes stored?
DTCP0420: Catalytic System Efficiency Below Threshold
NOTE: If some of the DTCs listed below are stored at like peas in a pod time as DTC P0420, troubleshoot those DTCs first, then recheck for DTC P0420.
P0137, P0138: Secondary HO2S (Sensor 2)
P0141: Secondary HO2S (Sensor 2) Heater
Do the ECM/PCM Reset Procedure.
Start the engine. Hold the engine at 3,000 rpm with no nouns (in Park or neutral) until the radiator fan comes on.
Test-drive 40 - 55 mph (64-88 kph) for approx. two minutes . Then decelerate for at least 3 second with the throttle completely closed. Then reduce the vehicle speed to 35 mph (56 kph) , and try to hold it until the scan tool indicates FAIL or PASS as the TWC theory test result. Is the test result FAIL? YES-Check the three way catalytic converter (TWC). If critical, replace the TWC. NO-Intermittent failure, system is OK at this time.
I have a 91 honda concurrence ex and my engine light is on all the time... we took it to the shop and apparently at hand was nothing wrong beside it. So im not sure. Hope you get it the way u want!
2ltr neon auto. pave the way gasket...
The "P0420" DTC indicates that in attendance is a deterioration in the FUNCTION of the Catalytic converter.The car have 2 O2 sensors, one at the engine, and one at the rear of the cat. Which one did he change?
There are test that we run to determine the cause of the code.
If the Cat is tested and found to within spec, afterwards we replace the rear sensor.
Find a shop that specializes in power-train supervision, preferably one that is EMISSIONS savy, like a licensed testing and repair Smog-Check shop.
Look for a shop that displays the ASE symbol.
I have a 91 honda concurrence ex and my engine light is on all the time... we took it to the shop and apparently at hand was nothing wrong beside it. So im not sure. Hope you get it the way u want!
I in recent times bought an o3...
Answers: Did they tell you if here were any other codes stored?
DTCP0420: Catalytic System Efficiency Below Threshold
NOTE: If some of the DTCs listed below are stored at like peas in a pod time as DTC P0420, troubleshoot those DTCs first, then recheck for DTC P0420.
P0137, P0138: Secondary HO2S (Sensor 2)
P0141: Secondary HO2S (Sensor 2) Heater
Do the ECM/PCM Reset Procedure.
Start the engine. Hold the engine at 3,000 rpm with no nouns (in Park or neutral) until the radiator fan comes on.
Test-drive 40 - 55 mph (64-88 kph) for approx. two minutes . Then decelerate for at least 3 second with the throttle completely closed. Then reduce the vehicle speed to 35 mph (56 kph) , and try to hold it until the scan tool indicates FAIL or PASS as the TWC theory test result. Is the test result FAIL? YES-Check the three way catalytic converter (TWC). If critical, replace the TWC. NO-Intermittent failure, system is OK at this time.
I have a 91 honda concurrence ex and my engine light is on all the time... we took it to the shop and apparently at hand was nothing wrong beside it. So im not sure. Hope you get it the way u want!
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