Code 43 on B20 swap

[George777]

I couldn't find any other posts on a CEL Code 43, unless I wasn't looking in the right spot.

I keep getting a CEL once the car is warmed up--Code 43. I have a B20 in my EF. Fuel pump was replaced with swap (LS or CRV pump I believe). Weird thing is, once the CEL comes on, the car seems to run BETTER... More often than not, if I am not getting on it, it will pop the CEL. Hard acceleration seems to keep it off for the most part.

Should I be worried about this? Time for a new pump? Honda won't look at it and nobody else seems to know. Everyone seems to say, "Just replace the pump." If that is the case, which pump to go with becomes the question. I would replace it with the Walbro 255, but if it's nothing that drastic, then I would prefer not to. Taking the tank down to change it the first time was enough of a pain...

Thanks in advance.

 

[jdmep3]

Advance auto has a book that tells what engine codes are.

 

[1_jdmcrx]

1
Accord Civic CRV CRX Del Sol Odyssey Prelude
85-98 86-98 97-98 85-91 93-97 95-98 85-98 Oxygen Sensor "A" (Primary)
defective circuit or unplugged / defective sensor
2
Accord Civic CRV CRX Del Sol Odyssey Prelude
85-89 86-87 n/a 85-87 85-91 n/a n/a Oxygen Sensor "B"
defective circuit or unplugged / defective sensor
3
Accord Civic CRV CRX Del Sol Odyssey Prelude
85-98 86-98 97-98 85-91 93-97 95-98 85-98 MAP Sensor (Manifold Absolute Pressure)
defective circuit or unplugged / defective sensor
4
Accord Civic CRV CRX Del Sol Odyssey Prelude
90-98 88-98 97-98 88-91 93-97 95-98 85-98 CKP Sensor (Crankshaft Position Sensor)
defective circuit or unplugged / defective sensor
5
Accord Civic CRV CRX Del Sol Odyssey Prelude
85-98 * 86-98 97-98 85-91 93-97 96-98 85-98 MAP Sensor (Manifold Absolute Pressure)
mechanical problem / disconnected piping
* exc 94-95
6
Accord Civic CRV CRX Del Sol Odyssey Prelude
85-98 86-98 97-98 85-91 93-97 95-98 85-98 ECT Sensor (Engine Coolant Temperature)
defective circuit or unplugged / defective sensor
7
Accord Civic CRV CRX Del Sol Odyssey Prelude
85-98 86-98 97-98 85-91 93-97 95-98 85-98 TP Sensor (Throttle Position)
defective circuit or unplugged / defective sensor
8
Accord Civic CRV CRX Del Sol Odyssey Prelude
85-98 86-98 97-98 85-91 93-97 95-98 85-98 TDC Sensor (Top Dead Center)
defective circuit or unplugged / defective sensor
9*
Accord Civic CRV CRX Del Sol Odyssey Prelude
85-98** 86-98 97-98 85-91 93-97 95-98 85-98 CYP Sensor (Cylinder)
defective circuit or unplugged / defective sensor
* not a valid code for any throttle body injection Hondas
** not a valid code for V-6 engines
10
Accord Civic CRV CRX Del Sol Odyssey Prelude
85-98 86-98 97-98 85-91 93-97 95-98 85-98 IAT Sensor (Intake Air Temperature)
defective circuit or unplugged / defective sensor
12
Accord Civic CRV CRX Del Sol Odyssey Prelude
85-98 86-98 * n/a 85-91 * n/a 95-98 85-98 EGR Lift Sensor (Exhaust Gas Recirculation)
defective circuit or unplugged / defective sensor
* not a valid code if car is not equipped with an EGR valve (some Civic models are not)
13
Accord Civic CRV CRX Del Sol Odyssey Prelude
85-98 86-98 97-98 85-91 93-97 95-98 85-98 BARO Sensor (Atmospheric Pressure)
defective circuit or unplugged / defective sensor
14
Accord Civic CRV CRX Del Sol Odyssey Prelude
88-98 88-98 97-98 88-91 93-97 95-98 88-98 IAC Valve (Idle Air Control)
defective circuit or unplugged / defective sensor
15
Accord Civic CRV CRX Del Sol Odyssey Prelude
90-95 88-95 n/a 88-91 93-95 95 88-95 Ignition Output Signal
missing or defective ignition output signal
16
Accord Civic CRV CRX Del Sol Odyssey Prelude
90-95 88-95 n/a 88-91 93-95 95 88-95 Fuel Injector System
defective circuit or unplugged / defective fuel injector
17
Accord Civic CRV CRX Del Sol Odyssey Prelude
88-98 88-98 97-98 88-91 93-97 95-97 88-98 VSS (Vehicle Speed Sensor)
defective circuit or unplugged / defective sensor
19
Accord Civic CRV CRX Del Sol Odyssey Prelude
n/a 88-95 n/a 88-91 93-97 n/a n/a Automatic Transmission Lock Up Control Solenoid Valve
defective circuit or unplugged / defective solenoid valve
20
Accord Civic CRV CRX Del Sol Odyssey Prelude
90-98 88-98 97-98 88-91 93-97 95-98 92-98 Electrical Load Detector
defective circuit or unplugged / defective sensor
21*
Accord Civic CRV CRX Del Sol Odyssey Prelude
94-98 ** 92-95 n/a n/a 93-95 n/a 93-95 VTEC Solenoid Valve
defective circuit or unplugged / defective solenoid valve
* not a valid code if car does not have a VTEC engine
** not with V-6 engine
22*
Accord Civic CRV CRX Del Sol Odyssey Prelude
94-98 92-98 n/a n/a 93-97 98 93-98` VTEC Oil Pressure Switch
defective circuit or unplugged / defective oil pressure switch
* not a valid code if car does not have a VTEC engine
23
Accord Civic CRV CRX Del Sol Odyssey Prelude
98 * 96-98 n/a n/a 94-97 n/a 92-98 KS (Knock Sensor)
defective circuit or unplugged / defective sensor
* not a valid code if V-6 engine
30
Accord Civic CRV CRX Del Sol Odyssey Prelude
90-98 * n/a n/a n/a n/a 95 92-98 * Automatic Transmission Signal: "A" / SEAF / SEFA / TMA or TMB
defective circuit or unplugged / defective sensor
* not a valid code for 1996
31
Accord Civic CRV CRX Del Sol Odyssey Prelude
90-95 n/a n/a n/a n/a 95 92-95 Automatic Transmission Signal "B"
defective circuit or unplugged / defective sensor
41
Accord Civic CRV CRX Del Sol Odyssey Prelude
90-98 92-98 97-98 n/a 93-97 95-98 90-98 Primary Oxygen Sensor - Heater
circuit malfunction
43
Accord Civic CRV CRX Del Sol Odyssey Prelude
90-95 92-95 n/a n/a 93-95 95 90-95 Fuel Supply System
defective or malfunctioning fuel supply system
45
Accord Civic CRV CRX Del Sol Odyssey Prelude
96-98 96-98 97-98 n/a 96-97 96-98 96-98 System Too Lean or Too Rich
malfunction in the fuel monitoring systems
48
Accord Civic CRV CRX Del Sol Odyssey Prelude
98 92-98 n/a n/a n/a n/a n/a LAF Sensor (Lean Air Fuel)
defective circuit or unplugged / defective sensor
54
Accord Civic CRV CRX Del Sol Odyssey Prelude
96 96-98 97-98 n/a 96-97 n/a n/a CKF Sensor (Crankshaft Speed Fluctuation)
defective circuit or unplugged / defective sensor
58
Accord Civic CRV CRX Del Sol Odyssey Prelude
98 * n/a n/a n/a n/a n/a n/a TDC Sensor 2 (Top Dead Center)
defective circuit or unplugged / defective sensor
* with V-6 engine only
61
Accord Civic CRV CRX Del Sol Odyssey Prelude
96-98 96-98 97-98 n/a 96-97 96-98 96-98 Oxygen Sensor, Heated - Sensor 1 (Primary)
high voltage, low voltage, or slow response
63
Accord Civic CRV CRX Del Sol Odyssey Prelude
96-98 96-98 97-98 n/a 96-97 96-98 96-98 Oxygen Sensor, Heated - Sensor 2 (Secondary)
high voltage, low voltage, or slow response
65
Accord Civic CRV CRX Del Sol Odyssey Prelude
96-98 96-98 97-98 n/a 96-97 96-98 96-98 Oxygen Sensor Heater (Secondary)
malfunctioning or defective oxygen sensor heater
67
Accord Civic CRV CRX Del Sol Odyssey Prelude
96-98 96-98 97-98 n/a 96-97 96-98 96-98 Catalyst system Efficiency Below Threshold
malfunctioning or defective catalyst system
70
Accord Civic CRV CRX Del Sol Odyssey Prelude
96-98 96-98 97-98 n/a n/a 96-98 96-98 Automatic Transmission
malfunction with the automatic transmission controls
71
Accord Civic CRV CRX Del Sol Odyssey Prelude
96-98 96-98 97-98 n/a 96-97 96-98 96-98 Cylinder 1 Misfire or a Random Misfire
a condition is present that is creating a cylinder misfire
72
Accord Civic CRV CRX Del Sol Odyssey Prelude
96-98 96-98 97-98 n/a 96-97 96-98 96-98 Cylinder 2 Misfire or a Random Misfire
a condition is present that is creating a cylinder misfire
73
Accord Civic CRV CRX Del Sol Odyssey Prelude
96-98 96-98 97-98 n/a 96-97 96-98 96-98 Cylinder 3 Misfire or a Random Misfire
a condition is present that is creating a cylinder misfire
74
Accord Civic CRV CRX Del Sol Odyssey Prelude
96-98 96-98 97-98 n/a 96-97 96-98 96-98 Cylinder 4 Misfire or a Random Misfire
a condition is present that is creating a cylinder misfire
75
Accord Civic CRV CRX Del Sol Odyssey Prelude
98 * n/a n/a n/a n/a n/a n/a Cylinder 5 Misfire or a Random Misfire
a condition is present that is creating a cylinder misfire
* valid code for V-6 engine only
76
Accord Civic CRV CRX Del Sol Odyssey Prelude
98 * n/a n/a n/a n/a n/a n/a Cylinder 6 Misfire or a Random Misfire
a condition is present that is creating a cylinder misfire
* valid code for V-6 engine only
80
Accord Civic CRV CRX Del Sol Odyssey Prelude
96-98 96-98 n/a n/a n/a 96-98 96-98 Exhaust Gas Recirculation
insufficient flow detected
86
Accord Civic CRV CRX Del Sol Odyssey Prelude
96-98 96-98 97-98 n/a 96-97 96-98 96-98 ECT Sensor (Engine Coolant Temperature)
circuit range / performance problem
90
Accord Civic CRV CRX Del Sol Odyssey Prelude
97-98 96-98 n/a n/a n/a 98 97-98 Evaporative Emission Control System
leak detected in the fuel tank area
91
Accord Civic CRV CRX Del Sol Odyssey Prelude
96-98 96-98 n/a n/a n/a 98 97-98 Fuel Tank Pressure Sensor
low input
92
Accord Civic CRV CRX Del Sol Odyssey Prelude
96-98 96-98 97-98 n/a 96-97 96-97 96-98 Evaporative Emission Control System

 

[George777]

I already knew what the engine code was by referring to the reference section. My question wasn't what the code was, it was what should my next action be based on the code I was throwing.

I do know how to reference material.

 

[1_jdmcrx]

Code 43 is generally the Oxy sensor being lazy or dead.It's easiest to just replace it than to try and test it. When it dies, the ECU goes into default If you test it, follow the Shop manual and make sure that you use a DIGITAL MULTIMETER ONLY> Analogue ones kill sensors real quick.( I use a Fluke 23)