Lextek1

Instrument cluster.

Under the hood, in the relay box, labled A/C MG CL. 50 bucks.

It is possible that your car is not equipped. As I recall, not all ES's had the filter but if you do, the previous instructions are correct. If not, there will not be the tab to remove as he referred.

Idle control valve is sticking. It is under the rubber intake tube where it meets the throttle body. It is repairable!

Check for a bad or lazy main o2 sensor by reading the voltages. Check for air leaking into the intake downstream of the air flow meter. Like the vacuum hoses from the P/S pump. Just ideas! Hope this helps.

Diag Code

25 Air–Fuel Ratio Lean Malfunction

Diag. 26 Air–Fuel Ratio Rich Malfunction

CIRCUIT DESCRIPTION

Refer to page TR–38 for the circuit description.

Code No. Diagnosis Trouble Area

1*1. The conditions (a) and (B) below are

detected once, then are established

again after the ignition switch is turned

from OFF to ON.

(a) The engine is warmed up and is in

a high load condition at an engine

rpm higher than 1500 rpm.

(B) The main oxygen sensor signal

stays lean for a set period of time

or longer.

Harness or connector between ECU

and main oxygen sensor.

Main oxygen sensor.

Fuel line pressure.

Ignition system.

Air intake system.

Injector circuit.

Water temp. sensor.

Intake air temp. sensor.

ECU

25

26

Normal Mode

2*2. When air–fuel ratio feedback compensation

value feedback frequency is

abnormally high during idle switch on

and feedback condition.

3*3. When the difference of air–fuel ratio

feedback compensation value between

right and left banks is more than

a certain percentage.

Code 25 displayed :

Deviation to lean side with the

difference more than a certain

percentage.

Code 26 displayed :

Deviation to rich side with the

difference more than a certain

percentage.

Codes 25 and 26 displayed:

Deviation to rich or lean side with

the difference less than a certain

percentage.

Fuel line pressure.

Air intake system.

Injector circuit.

Ignition system.

Cold start injector circuit.

Water temp. sensor.

Intake air temp. sensor.

ECU

Test

Security key switch has fallen off of the drivers door lock cylinder.