Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1997 Geo Metro BaseFACTORY OEM SERVICE PROCEDURE
DTC Definitions
DTC IDENTIFICATION
| DTC | Description | Type | ||||
|---|---|---|---|---|---|---|
| P0106 | Manifold Absolute Pressure Sensor Performance | B | ||||
| P0107 | Manifold Absolute Pressure Sensor Circuit Voltage Low | A | ||||
| P0108 | Manifold Absolute Pressure Sensor Circuit Voltage High | A | ||||
| P0112 | Intake Air Temperature Sensor Circuit Voltage Low | A | ||||
| P0113 | Intake Air Temperature Sensor Circuit Voltage High | A | ||||
| P0117 | Engine Coolant Temperature Sensor Circuit Voltage Low | A | ||||
| P0118 | Engine Coolant Temperature Sensor Circuit Voltage High | A | ||||
| P0121 | Throttle Position Sensor System Performance | B | ||||
| P0122 | Throttle Position Sensor Circuit Voltage Low | A | ||||
| P0123 | Throttle Position Sensor Circuit Voltage High | A | ||||
| P0125 | Excessive Time To Enter Closed Loop | B | ||||
| P0131 | Heated Oxygen Sensor-1 (HO2S-1) Circuit Voltage Low | B | ||||
| P0132 | Heated Oxygen Sensor-1 (HO2S-1) Circuit Voltage High | B | ||||
| P0133 | Heated Oxygen Sensor-1 (HO2S-1) Slow Response | B | ||||
| P0134 | Heated Oxygen Sensor-1 (HO2S-1) Circuit Activity Insufficient | B | ||||
| P0135 | Heated Oxygen Sensor 1 (HO2S-1) Heater Circuit | B | ||||
| P0136 | Heated Oxygen Sensor-2 (HO2S-2) Circuit | B | ||||
| P0141 | Heated Oxygen Sensor-2 (HO2S-2) Heater Circuit | B | ||||
| P0171 | Fuel Trim System Lean | B | ||||
| P0172 | Fuel Trim System Rich | B | ||||
| P0300 | Engine Misfire Detected | B | ||||
| P0301 | Cylinder No. 1 Misfire Detected | B | ||||
| P0302 | Cylinder No. 2 Misfire Detected | B | ||||
| P0303 | Cylinder No. 3 Misfire Detected | B | ||||
| P0304 (1) |
Cylinder No. 4 Misfire Detected | B | ||||
| P0335 | Crankshaft Position (CKP) Sensor Circuit | A | ||||
| P0340 | Camshaft Position (CMP) Sensor Circuit | A | ||||
| P0400 (2) |
EGR System | B | ||||
| P0420 | Three-Way Catalyst (TWC) System Low Efficiency | B | ||||
| P0440 | Evaporative Emission (EVAP) System (1.3L VIN 9 Only) | B | ||||
| P0443 | Evaporative Emission (EVAP) System Purge Flow Incorrect | B | ||||
| P0450 (1) |
Evaporative Emission (EVAP) System Pressure Sensor Circuit (1.3L VIN 9 Only) | B | ||||
| P0451 (1) |
Evaporative Emission (EVAP) System Pressure Sensor Performance (1.3L VIN 9 Only) | B | ||||
| P0455 (1) |
Evaporative Emission (EVAP) System Leak Detected (1.3L VIN 9 Only) | A | ||||
| P0461 | Fuel Level Sensor Circuit Performance | B | ||||
| P0463 | Fuel Level Sensor Circuit Voltage High | B | ||||
| P0480 | Cooling Fan Control System | B | ||||
| P0500 | Vehicle Speed Sensor (VSS) CIRCUIT (A/T Only) | A | ||||
| P0500 | Vehicle Speed Sensor (VSS) Circuit (M/T Only) | A | ||||
| P0505 | Idle Control System | A | ||||
| P0506 | Idle Speed Low | B | ||||
| P0507 | Idle Speed High | B | ||||
| P0510 | Closed Throttle Position (CTP) Switch Circuit | B | ||||
| P0601 | Powertrain Control Module (PCM) Memory | B | ||||
| P0603 | Powertrain Control Module (PCM) Memory Reset | B | ||||
| P1250 | Early Fuel Evaporation (EFE) Heater Circuit | B | ||||
| P1410 (1) |
Fuel Tank Pressure System (1.3L VIN 9 Only) | B | ||||
| P1450 | Barometric Pressure Sensor Circuit | A | ||||
| P1451 | Barometric Pressure Sensor Performance | B | ||||
| P1500 | Starter Signal Circuit | B | ||||
| P1510 | Back-Up Power Supply | A | ||||
| P1530 | Ignition Timing Adjustment Switch Circuit | A | ||||
|
||||||
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.