Jeep Wrangler Trouble Codes, Symptoms & Recalls
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Common check engine codes on the Jeep Wrangler
- P0420 — Catalyst System Efficiency Below Threshold (Bank 1)
- P0300 — Random/Multiple Cylinder Misfire Detected
- P0171 — System Too Lean (Bank 1)
- P0442 — Evaporative Emission System Small Leak Detected
- P0455 — Evaporative Emission System Large Leak Detected
- P0128 — Coolant Temperature Below Thermostat Regulating Temperature
- P0401 — EGR Insufficient Flow Detected
- P0440 — Evaporative Emission Control System Malfunction
- P0301 — Cylinder 1 Misfire Detected
- P0174 — System Too Lean (Bank 2)
Common Jeep Wrangler symptoms
- Jeep Wrangler car shaking when braking
- Jeep Wrangler brakes squealing when stopping
- Jeep Wrangler check engine light on
- Jeep Wrangler car won't start
- Jeep Wrangler car overheating
- Jeep Wrangler car loses power when accelerating
- Jeep Wrangler car running or idling rough
- Jeep Wrangler white smoke from exhaust
- Jeep Wrangler blue smoke from exhaust
- Jeep Wrangler battery light on while driving
- Jeep Wrangler car pulls to one side
- Jeep Wrangler car ac not blowing cold
Maintenance & recalls
Jeep Wrangler maintenance resources · Jeep Wrangler NHTSA recalls & complaints