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How to: Retrieve CEL, ATTS, ABS, and 4WS Codes


Step 1: Get into the passenger side of your car. Locate the OBD-II panel cover and just pull it off.
obd2 panel

obd2 panel


Step 2: Locate and remove the blue 2-pin connector.
obd2 panel

obd2 panel


Step 3: Locate and insert your jumper. Some people use paperclips or twisty-ties. I prefer a standard forked ground connector. It doesn't flex and is a perfect fit.
jumper

jumper


Step 4: Put your key in the ignition and turn forward to the second or "ON" setting (no photo needed, I hope).

Step 5: Count the pretty lights. It's basically like Morse code, with short and long durations. Long durations come first, followed by shorts. Long duration = 10 each, short duration = 1 each. Example: Long Long Long Long Short Short Short = 43. There is about a half second pause between each same duration and about a full second pause before switching to a different duration. Example: Code 22 = Long (half second pause), Long (full second pause), Short (half second pause), Short. If there is more than one code stored for a particular system, there will be a 2-3 second pause between the codes.
cluster

Now then, the Diagnostic Troubleshooting Codes (DTCs):

Check Engine Light (CEL)
1 - O2A: Oxygen Sensor #1 (primary) - P0131 (low voltage), P0132 (high voltage)
2 - O2B: Oxygen Sensor #2 (secondary) - high/low voltage
3 - MAP: Manifold Absolute Pressure Sensor - P0107 (low input), P0108 (high input)
4 - CKP: Crank Position Sensor - P0335 (circuit malfunction), P0336 (range/performance)
5 - MAP: Manifold Absolute Pressure Sensor - P0106 (range/performance), P1128 (low), P1129 (high)
6 - ECT: Engine Coolant Temperature Sensor - P0117 (low input), P0118 (high input)
7 - TPS: Throttle Position Sensor - P0122 (low input), P0123 (high input), P1121 (position low), P1122 (position high)
8 - TDC: Top Dead Center Sensor - P1359 (disconnected), P1361 (intermittent interruption), P1362 (no signal)
9 - CYP: Cylinder Sensor - P1381 (intermittent interruption), P1382 (no signal)
10 - IAT: Intake Air Temperature Sensor - P0111 (range/performance), P0112 (low input), P0113 (high input)
12 - EGR: Exhaust Gas Recirculation Lift Valve - P1491 (insufficient lift), P1498 (high voltage)
13 - BARO: Barometric/Atmospheric Pressure Sensor - P1106 (range/performance), P1107 (low input), P1108 (high input)
14 - IAC (EACV): Idle Air Control Valve - P0505 (system malfunction), P1508, P1509, P1519 (circuit failure)
15 - Ignition Output Signal
16 - Fuel Injectors
17 - VSS: Vehicle Speed Sensor - P0500 (circuit malfunction), P0501 (range/performance)
19 - Automatic Transmission Lockup Control Valve
20 - Electrical Load Detector - P1297 (low input), P1298 (high input)
21 - VTEC Spool Solenoid Valve - P1253 (system malfunction)
22 - VTEC Pressure Valve - P1257, P1258, P1259 (system malfunction)
23 - KS: Knock Sensor - P0325 (circuit malfunction)
30 - Automatic Transmission "A" Signal - P1655 (SEAF/SEFA signal line failure), P1681 (low input), P1682 (high input)
31 - Automatic Transmission "B" Signal - P1686 (low input), P1687 (high input)
34 - Powertrain Control Module (PCM) Backup Voltage Circuit - P0560 (low voltage)
36 - Traction Control (JDM only)
41 - Primary Oxygen Sensor Heater (HO2S) - P0135 (circuit malfunction), P1166 (system electrical), P1167 (system)
43 - Fuel Supply System
45 - Fuel System - P0171 (too lean), P0172 (too rich)
48 - LAF: Lean Air/Fuel Sensor - P1162 (circuit malfunction), P1168 (LABEL low input), P1169 (LABEL high input)
54 - CKF: Crank Fluctuation Sensor - P1336 (intermittent interruption), P1337 (no signal)
58 - TDC: Top Dead Center Sensor #2 - P1366 (intermittent interruption), P1367 (no signal)
61 - Primary Oxygen Sensor - P0133 (slow response), P1149 (range/performance), P1163 (slow response), P1164, P1165 (range/performance)
63 - Secondary Oxygen Sensor - P0137 (low voltage), P0138 (high voltage), P0139 (slow response)
65 - Secondary Oxygen Sensor Heater (HO2S) - P0141 (circuit malfunction)
67 - Catalyst System - P0420 (efficiency below threshold)
70 - Automatic Transaxle - P1660 (Signal A circuit failure), P0700, P0715, P0720, P0725, P0730, P0740, P0753, P0758, P0763, P0780, P1705, P1706, P1738, P1739, P1753, P1758, P1768, P1773, P1785, P1786, P1790, P1791, P1792, P1793, P1794, P1870, P1873, P1879, P1885, P1886, P1888, P1890, P1891 (automatics suck)
71 - Cylinder 1 - P0300 (random misfire), P0301 (misfire detected), P1300 (multiple misfire)
72 - Cylinder 2 - P0300 (random misfire), P0302 (misfire detected), P1300 (multiple misfire)
73 - Cylinder 3 - P0300 (random misfire), P0303 (misfire detected), P1300 (multiple misfire)
74 - Cylinder 4 - P0300 (random misfire), P0304 (misfire detected), P1300 (multiple misfire)
75 - Cylinder 5 - P0305 (misfire detected)
76 - Cylinder 6 - P0306 (misfire detected)
80 - EGR: Exhaust Gas Recirculation - P0401 (insufficient flow)
86 - ECT: Engine Coolant Temperature - P0116 (range/performance)
90 - Evaporative (EVAP) Emission Control System - P1456 (fuel tank system leak), P1457 (control canister system leak)
91 - Fuel Tank Pressure Sensor - P0451 (range/performance), P0452 (low input), P0453 (high input)
92 - Evaporative (EVAP) Emission Purge Flow - P0441 (improper purge flow), P1459[/b] (switch malfunction)
No # - Thermostat - P1486 (range/performance)
No # - ECM/PCM: Engine Control Module/Powertrain Control Module - P1607 (internal circuit failure A)
No # - FPTDR: - P1676, P1678 (signal line failure)

* All Honda codes, but not all codes are specific to Preludes (obviously).

Active Torque Transfer System (ATTS)
11 - Lateral G Sensor
12 - Lateral G Sensor
13 - Lateral G Sensor
14 - Lateral G Sensor
16 - Steering Angle Sensor
17 - Steering Angle Sensor
18 - Steering Angle Sensor
19 - Steering Angle Sensor
21 - Wheel Sensor: LF
22 - Wheel Sensor: RF
23 - Wheel Sensor: LR
24 - Wheel Sensor: RR
25 - Wheel Sensor
29 - Data Link Connector
32 - Back-up Light Switch
33 - MAP: Manifold Absolute Pressure Sensor
35 - Reference Voltage
36 - VSS: Vehicle Speed Sensor
37 - VSS: Vehicle Speed Sensor
41 - ECM Communication Line
42 - ECM Communication Line
43 - ECM Communication Line
44 - ABS Function
45 - ABS Down
51 - Fail-safe Relay
52 - Left Shift Solenoid
53 - Right Shift Solenoid
54 - Linear Solenoid
55 - Linear Solenoid
56 - Linear Solenoid
57 - Oil Temperature Sensor
58 - Oil Temperature Sensor
61 - Left Oil Pressure Sensor
62 - Left Oil Pressure Sensor
63 - Left Oil Pressure Sensor
64 - Right Oil Pressure Sensor
65 - Right Oil Pressure Sensor
66 - Right Oil Pressure Sensor
71 - Steering Angle Sensor
72 - Different Diameter Tires
73 - Yaw Rate Sensor
74 - Yaw Rate Sensor
75 - Yaw Rate Sensor
76 - Yaw Rate Sensor
77 - Ignition Voltage
78 - ATTS Control Unit
79 - ATTS Control Inhibition

Anti-lock Braking System (ABS)
11 - Wheel Sensor: RF (Open/Short to Body Ground/Short to Power)
12 - Wheel Sensor: RF (Electrical Noise/Intermittent Interruption)
13 - Wheel Sensor: LF (Open/Short to Body Ground/Short to Power)
14 - Wheel Sensor: LF (Electrical Noise/Intermittent Interruption)
15 - Wheel Sensor: RR (Open/Short to Body Ground/Short to Power)
16 - Wheel Sensor: RR (Electrical Noise/Intermittent Interruption)
17 - Wheel Sensor: LR (Open/Short to Body Ground/Short to Power)
18 - Wheel Sensor: LR (Electrical Noise/Intermittent Interruption)
21 - Pulser: RF
22 - Pulser: LF
23 - Pulser: RR
24 - Pulser: LR
31 - Solenoid: RF-In
32 - Solenoid: RF-Out
33 - Solenoid: LF-In
34 - Solenoid: LF-Out
35 - Solenoid: RR-In
36 - Solenoid: RR-Out
37 - Solenoid: LR-In
38 - Solenoid: LR-Out
41 - Wheel Lock: RF
42 - Wheel Lock: LF
43 - Wheel Lock: RR
44 - Wheel Lock: LR
51 - Motor Lock
52 - Motor Stuck OFF
53 - Motor Stuck ON
54 - Fail-safe Relay
61 - Ignition Voltage
62 - Ignition Voltage
71 - Different Diameter Tires
81 - Central Processing Unit (CPU)

Four Wheel Steering (4WS)
10 - Sub Steering Angle Sensor: F
11 - Sub Steering Angle Sensor: R
12 - Sub Steering Angle Sensor: F
13 - Sub Steering Angle Sensor: R
14 - Sub Steering Angle Sensor: F
15 - Sub Steering Angle Sensor: R
16 - Sub Steering Angle Sensor: F
17 - Sub Steering Angle Sensor: R
18 - Sub Steering Angle Sensor
20 - Main Steering Angle Sensor: F
21 - Main Steering Angle Sensor: R
22 - Main Steering Angle Sensor: F
23 - Main Steering Angle Sensor: R
24 - Main Steering Angle Sensor: F
25 - Main Steering Angle Sensor: R
26 - Main Steering Angle Sensor: F
27 - Main Steering Angle Sensor: R
28 - Main Steering Angle Sensor: F
29 - Main Steering Angle Sensor: R
30 - Wheel Speed Sensor: Front
31 - Wheel Speed Sensor: LR
32 - Wheel Speed Sensor: RR
33 - Wheel Speed Sensor: Rear Left or Right
34 - Wheel Speed Sensor: Front
35 - Wheel Speed Sensor: LR
36 - Wheel Speed Sensor: RR
37 - Wheel Speed Sensor: LR
38 - Wheel Speed Sensor: Vehicle Speed
40 - 4WS Control Unit
41 - 4WS Control Unit
42 - 4WS Control Unit
43 - 4WS Control Unit
44 - 4WS Control Unit
45 - 4WS Control Unit
46 - 4WS Control Unit
50 - Control Logic: Motor Lock
51 - Control Logic: Wheel Caught In Ditch
60 - Power Unit: Motor
61 - Power Unit
62 - Power Unit: Motor
63 - Power Unit
64 - Power Unit: 4WS Control Unit
65 - Power Unit: 4WS Control Unit
70 - Temporary Driving Conditions: Ignition turned from OFF to ON while driving
71 - Temporary Driving Conditions: Aggressive driving with heavy load or rear wheel blocked from turning
72 - Temporary Driving Conditions
73 - Temporary Driving Conditions: Engine started while quick charging battery
74 - Temporary Driving Conditions: Driving with parking brake ON
No # - 4WS Control Unit or Harness Connector
No # - 4WS Control Unit, Harness Connector, or Alternator

Now that you have your codes pulled, it's time to fix them. For CEL DTCs, go to Step 6. For ATTS DTCs, go to Step 9. For ABS DTCs, go to Step 12. For 4WS DTCs, go to Step 15.

Step 6: Download the Helms manual from
here

Step 7: Turn to Chapter 11, Pages 46-50 in the Helms. Find the code in the charts and turn to the page indicated. Begin troubleshooting.

Step 8: To clear CEL DTCs, follow these steps.

Pop the hood and go to the Under-hood Fuse Box.
fuse box

Locate and remove the Clock/Radio fuse. It's the middle fuse on the top row (the only 7.5A fuse on the top row). Removing for 5 seconds is sufficient.
fuse box

fuse box

fuse box

Put everything back together.

Step 9: Download the Helm's manual from
here

Step 10: Turn to Chapter 15, Page 16. Find the code in the charts and turn to the page indicated. Begin troubleshooting.

Step 11: Follow these steps to clear ATTS DTCs.
atts clearing codes

Step 12: Download the Helm's manual from
here

Step 13: Turn to Chapter 19, Page 41. Find the code in the charts and turn to the page indicated. Begin troubleshooting.

Step 14: Follow these steps to clear ABS DTCs.
abs clearing codes

Step 15: Download the Helms manual from
here. This is the 4th Gen (1992-1996) non-USDM manual. The 4WS system is the same.

Step 16: Turn to Chapter 17, Page 38. Find the code in the charts and turn to the page indicated. Begin troubleshooting.

Step 17: Follow these steps to clear 4WS DTCs.

4ws clearing codes




--- This how to courtesy of Kronn 98SH ---


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