Anybody familiar on DTC code P2a03? I have a HFC and I just installed a non-foulers. It took care of the p0420 and P0320 but the other came out.

 

P codes only come in the P0's or P1's and they dont got any a's or anything like that in a code

P0320 - Ignition Engine Speed Input Circuit Malfunction The ignition engine speed sensor input signal to PCM is continuously monitored. The test fails when the signal indicates that two successive erratic profile ignition pickup (PIP) pulses have occurred. Loose wires/connectors.
Arcing secondary ignition components (coil, wires and plugs)
On board transmitter (2-way radio)
The DTC indicates that two successive erratic PIP pulses occurred.


P0420 - Catalyst System Efficiency Below Threshold (Bank 1) Indicates Bank 1 catalyst system efficiency is below the acceptable threshold Use of leaded fuel
Damaged HO2S
Malfunctioning ECT
High fuel pressure
Damaged exhaust manifold
Damaged catalytic converter
Oil contamination
Cylinder misfiring
Downstream HO2S wires improperly connected
Damaged exhaust system pipe
Damaged muffler/tailpipe assembly
Retarded spark timing
Compare HO2S upstream and downstream switch rate and amplitude. Under normal closed loop fuel conditions, high efficiency catalysts have oxygen storage which makes the switching frequency of the downstream HO2S very slow and reduces the amplitude of those switches as compared to the upstream HO2S. As catalyst efficiency deteriorates, its ability to store oxygen declines and the downstream HO2S signal begins to switch more rapidly with increase amplitude, approaching the switching rate and amplitude of the upstream HO2S. Once beyond an acceptable limit the DTC is set.

 

there is a dtc code P2A03. It is a circuit range/performance bank 2 sensor 1. What I'm trying to figure out now is which one is sensor 1, driver or passenger side?

 

Bank1 is where cylinder number 1 is which is the odd number of cylinders and bank 2 is where cylinder number 2 is which got the even numbers on V type engines. as far as codes.


P 0 1 0 1
1 2 3 4 5

1st digit
P = powertrain
B = Body
C = Chassis

2nd digit
0 = Standard
1 = Manufacturer specific

3rd digit
1 = Emission management
2 = Injector circuit
3 = Ignition
4 = Auxiliary emission
5 = Vehicle speed & idle control
6 = Computer & output circuit
7 = Transmission

 

Thanks a lot. I got the code from my AP and I'm sure is not accurate. I'll swing by the dealer and let them check it out. I just don't want the dealer stressing me about my HFC and the non-foulers.

 

anybody here know were i can get a set of header O2 sensors for a good price?