Most Honda cars 1995 or older can be "chipped" and recalibrated,
Here is some additional honda information as well. (just fail codes and what they mean)
Pre OBDI ECUs
To read the codes, turn the ignition on and look at the LED inside the ECU. The
LED is visible through a small plastic window in the top of the ECU. The ECU can
signal simultaneous problems by blinking separate codes, one after the other.
Problem codes 1 - 9 are indicated by 1 - 9 flashes, problem codes over 9 use one
long flash as ten short flashes.
OBDI and later ECUs
Find the diagnostic connector, which is a two wire blue connector found near
the passengers feet, or in the centre console.
Short out the diagnostic connector with a piece of wire. The check engine light
on the dash will flash the problem codes.
| Code | Meaning |
| 1 | O2A - Oxygen sensor #1 |
| 2 | O2B - Oxygen sensor #2 |
| 3 | MAP - manifold absolute pressure sensor |
| 4 | CKP - crank position sensor |
| 5 | MAP - manifold absolute pressure sensor |
| 6 | ECT - water temperature sensor |
| 7 | TPS - throttle position sensor |
| 8 | TDC - top dead centre sensor |
| 9 | CYP - cylinder sensor |
| 10 | IAT - intake air temperature sensor |
| 12 | EGR - exhaust gas recirculation lift valve |
| 13 | BARO - atmospheric pressure sensor |
| 14 | IAC (EACV) - idle air control valve |
| 15 | Ignition output signal |
| 16 | Fuel injectors |
| 17 | VSS - speed sensor |
| 19 | Automatic transmission lockup control valve |
| 20 | Electrical load detector |
| 21 | VTEC spool solenoid valve |
| 22 | VTEC pressure valve |
| 23 | Knock sensor |
| 30 | Automatic transmission A signal |
| 31 | Automatic transmission B signal |
| 41 | Primary oxygen sensor heater |
| 43 | Fuel supply system |
| 45 | Fuel system too rich or lean |
| 48 | LAF - lean air fuel sensor |
| 54 | CKF - crank fluctuation sensor |
| 58 | TDC sensor #2 |
| 61 | Primary oxygen sensor |
| 63 | Secondary oxygen sensor |
| 65 | Secondary oxygen sensor heater |