Code 13 - Oxygen Sensor Circuit

NOTE: Before diagnosing trouble according to flow chart given below, check to make sure that following system and parts other than Electronic Fuel Injection system are in good condition.

Air cleaner (clogged)
Vacuum leaks (air inhaling)
Spark plugs (contamination, gap)
High-tension wires (crack, deterioration)
Distributor rotor or cap (wear, crack)
Ignition timing
Engine compression
Any other system and parts which might affect A/F mixture or combustion.

If code No. 13 and another code No. are indicated together, the latter has priority. Therefore, check and correct what is represented by that code No. first and then proceed to the following check.

Fig 1: Code 13 Schematic, O2 Sensor Circuit

Courtesy of SUZUKI OF AMERICA CORP.

Fig 2: Code 13 Flow Chart, O2 Sensor Circuit

Courtesy of SUZUKI OF AMERICA CORP.