Trouble Code Charts
WARNING: This page is about a different car, the 1989 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
TROUBLE CODE DIAGNOSTIC HINTS (CARBURETED VEHICLES)
| Trouble Code | Diagnostic Hints | ||
|---|---|---|---|
| 12 | No RPM (Ignition) Signal to ECU within several seconds after engine is cranked. | ||
| 21 | Detects deterioration of oxygen sensor. | ||
| 22 | Open or short in coolant temperature sensor/switch signal. | ||
| 25 | Open circuit in O2 sensor signal (1) EBCV and/or EACV always open. Short in EBCV signal. | ||
| 26 | EBCV always closed or clogged hose. Open circuit in EBCV signal. | ||
| 31 | Open or short in vacuum switches signal. | ||
| 41 | Open or short in throttle switch signal. | ||
| 42 | Open or short in vehicle speed sensor. | ||
| 71 | EGR valve normally closed, or clogged hose. Open circuit in EGR temperature sensor signal | ||
| 72 | Open circuit in fuel-cut solenoid signal | ||
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