---

To retrieve OBDII Error codes from your Chrysler/Jeep/Dodge vehicle, do the following sequence with the key: ON-ACC-ON-ACC-ON and look at the odometer, that is where codes will be displayed. Here are the codes that you may/can get. Ho2S = heated oxyen sensor, TP = throttle position, MAF = mass airflow, MAP = manifold absolute pressure, TC=turbocharger. [table]Code|What it means P0030|HO2S Heater Control Circuit Bank 1 Sensor 1 P0031|HO2S Heater Circuit Low Voltage Bank 1 Sensor 1 P0032|HO2S Heater Circuit High Voltage Bank 1 Sensor 1 P0036|HO2S Heater Control Circuit Bank 1 Sensor 2 P0037|HO2S Heater Circuit Low Voltage Bank 1 Sensor 2 P0038|HO2S Heater Circuit High Voltage Bank 1 Sensor 2 P0050|HO2S Heater Circuit Bank 2 Sensor 1 P0051|HO2S Heater Circuit Low Voltage Bank 2 Sensor 1 P0052|HO2S Heater Circuit High Voltage Bank 2 Sensor 1 P0056|HO2S Heater Circuit Bank 2 Sensor 2 P0057|HO2S Heater Circuit Low Voltage Bank 2 Sensor 2 P0058|HO2S Heater Circuit High Voltage Bank 2 Sensor 2 P0100|MAF Sensor Ckt. Insufficient Activity P0101|Mass Air Flow (MAF) Sensor Performance P0102|Mass Air Flow (MAF) Sensor Circuit Low Frequency P0103|Mass Air Flow (MAF) Sensor Circuit High Frequency P0104|Mass Air Flow Circuit Intermittent P0105|MAP Sensor Circuit Insufficient Activity P0106|Manifold Absolute Pressure (MAP) System Performance P0107|Manifold Absolute Pressure (MAP) Sensor Circuit LowVoltage P0108|Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage P0109|Manifold Absolute Pressure Circuit Intermittent P0110|Intake Air Temperature (IAT) Sensor Circuit P0111|Intake Air Temperature (IAT) Sensor Performance P0112|Intake Air Temperature (IAT) Sensor Circuit Low Voltage P0113|Intake Air Temperature (IAT) Sensor Circuit High Voltage P0114|Intake Air Temperature Circuit Intermittent P0115|Engine Coolant Temperature (ECT) Sensor Circuit P0116|Engine Coolant Temperature (ECT) Sensor Performance P0117|Engine Coolant Temperature (ECT) Sensor Circuit LowVoltage P0118|Engine Coolant Temperature (ECT) Sensor Circuit High Voltage P0119|Engine Coolant Temperature Circuit Intermittent P0120|Throttle Position System Performance P0121|Throttle Position Sensor Circuit Insufficient Activity P0122|Throttle Position (TP) Sensor Circuit Low Voltage P0123|Throttle Position (TP) Sensor Circuit High Voltage P0124|Throttle Position Sensor 1 Circuit Intermittent P0125|Engine Coolant Temperature (ECT) Insufficient for Closed Loop Fuel Control P0126|Insufficient Engine Coolant Temperature for StableOperation P0128|Coolant Thermostat P0130|HO2S Circuit Closed Loop (CL) Performance Bank 1 Sensor 1 P0131|HO2S Circuit Low Voltage Bank 1 Sensor 1 P0132|HO2S Circuit High Voltage Bank 1 Sensor 1 P0133|HO2S Slow Response Bank 1 Sensor 1 P0134|HO2S Circuit Insufficient Activity Bank 1 Sensor 1 P0135|HO2S Heater Performance Bank 1 Sensor 1 P0136|HO2S Circuit Bank 1 Sensor 2 P0137|HO2S Circuit Low Voltage Bank 1 Sensor 2 P0138|HO2S Circuit High Voltage Bank 1 Sensor 2 P0139|HO2S Slow Response Bank 1 Sensor 2 P0140|HO2S Circuit Insufficient Activity Bank 1 Sensor 2 P0141|HO2S Heater Performance Bank 1 Sensor 2 P0142|HO2S Circuit Bank 1 Sensor 3 P0143|HO2S Circuit Low Voltage Bank 1 Sensor 3 P0144|HO2S Circuit High Voltage Bank 1 Sensor 3 P0145|HO2S Circuit Bank 1 Sensor 2 Slow Response P0146|HO2S Circuit Insufficient Activity Bank 1 Sensor 3 P0147|HO2S Heater Performance Bank 1 Sensor 3 P0150|HO2S Circuit Closed Loop (CL) Performance Bank 2 Sensor 1 P0150|HO2S Circuit Bank 2 Sensor 1 P0151|HO2S Circuit Low Voltage Bank 2 Sensor 1 P0152|HO2S Circuit High Voltage Bank 2 Sensor 1 P0153|HO2S Slow Response Bank 2 Sensor 1 P0154|HO2S Circuit Insufficient Activity Bank 2 Sensor 1 P0155|HO2S Heater Performance Bank 2 Sensor 1 P0156|HO2S Circuit Bank 2 Sensor 2 P0157|HO2S Circuit Low Voltage Bank 2 Sensor 2 P0158|HO2S Circuit High Voltage Bank 2 Sensor 2 P0159|HO2S Slow Response Bank 2 Sensor 2 P0160|HO2S Circuit Insufficient Activity Bank 2 Sensor 2 P0161|HO2S Heater Performance Bank 2 Sensor 2 P0162|HO2S Circuit Bank 2 Sensor 3 P0163|HO2S Circuit Bank 2 Sensor 3 Low Voltage P0164|HO2S Circuit Bank 2 Sensor 3 High Voltage P0165|HO2S Circuit Bank 2 Sensor 3 Slow Response P0166|HO2S Circuit Bank 2 Sensor 3 No Activity Detected P0167|HO2S Heater Circuit Bank 2 Sensor 3 P0169|Fuel Composition Sensor P0170|Fuel Trim Bank 1 P0171|Fuel Trim System Lean Bank 1 P0172|Fuel Trim System Rich Bank 1 P0173|Fuel Trim Bank 2 P0174|Fuel Trim System Lean Bank 2 P0175|Fuel Trim System Rich Bank 2 P0176|Fuel Composition Sensor Circuit P0177|Fuel Composition Sensor Circuit Performance P0178|Fuel Composition Sensor Circuit Low Voltage P0179|Fuel Composition Sensor Circuit High Voltage P0180|Fuel Temperature Sensor 1 Circuit P0181|Fuel Temp. Sensor 1 Circuit Performance P0182|Fuel Temperature Sensor Circuit Low Voltage P0183|Fuel Temperature Sensor Circuit High Voltage P0184|Fuel Temperature Sensor 1 Circuit Intermittent P0185|Fuel Temperature Sensor 2 Circuit P0186|Fuel Temp. Sensor 2 Circuit Performance P0187|Fuel Temperature Sensor 2 Circuit Low Voltage P0188|Fuel Temperature Sensor 2 Circuit High Voltage P0189|Fuel Temperature Sensor 2 Circuit Intermittent P0190|Fuel Rail Pressure Sensor Circuit P0191|Fuel Rail Pressure Sensor Circuit Performance P0192|Fuel Rail Pressure Sensor Circuit Low Voltage P0193|Fuel Rail Pressure Sensor Circuit High Voltage P0194|Fuel Rail Pressure Sensor Circuit Intermittent P0195|Engine Oil Temperature Sensor P0196|Engine Oil Temperature Sensor Performance P0197|Engine Oil Temperature Sensor Low Voltage P0198|Engine Oil Temperature Sensor High Voltage P0199|Engine Oil Temperature Sensor Intermittent P0200|Injector Control Circuit P0201|Injector 1 Control Circuit P0202|Injector 2 Control Circuit P0203|Injector 3 Control Circuit P0204|Injector 4 Control Circuit P0205|Injector 5 Control Circuit P0206|Injector 6 Control Circuit P0207|Injector 7 Control Circuit P0208|Injector 8 Control Circuit P0209|Injector 9 Control Circuit P0210|Injector 10 Control Circuit P0211|Injector 11 Control Circuit P0212|Injector 12 Control Circuit P0213|Cold Start Injector 1 P0214|Cold Start Injector 2 P0215|Engine Shutoff Control Circuit P0216|Injection Timing Control Circuit P0217|Engine Overtemp Condition P0218|Transmission Fluid Overtemperature P0219|Engine Overspeed Condition P0220|APP Sensor 2 Circuit P0221|APP (Throttle Position) Sensor 2 Circuit Performance P0222|APP (Throttle Position) Sensor 2 Circuit Low Voltage P0223|APP (Throttle Position) Sensor 2 Circuit High Voltage P0224|Throttle Position Sensor 2 Intermittent P0225|APP Sensor 3 Circuit P0226|APP Sensor 3 Circuit Performance P0227|APP Sensor 3 Circuit Low Voltage P0228|APP Sensor 3 Circuit High Voltage P0229|Throttle Position Sensor 3 Intermittent P0230|Fuel Pump Relay Control Circuit P0231|Fuel Pump Feedback Circuit Low Voltage P0232|Fuel Pump Feedback Circuit High Voltage P0233|Fuel Pump Secondary Circuit Intermittent P0234|TC Engine Overboost Condition P0235|Turbocharger Boost Sensor 1 Circuit P0236|TC Boost System P0237|TC Boost Sensor Circuit Low Voltage P0238|TC Boost Sensor Circuit High Voltage P0239|Turbocharger Boost Sensor 2 Circuit P0240|Turbocharger Boost Sensor 2 Performance P0241|Turbocharger Boost Sensor 2 Circuit Low Voltage P0242|Turbocharger Boost Sensor 2 Circuit High Voltage P0243|Turbocharger Wastegate Solenoid 1 P0244|Turbocharger Wastegate Solenoid 1 Performance P0245|Turbocharger Wastegate Solenoid 1 Low Voltage P0246|Turbocharger Wastegate Solenoid 1 High Voltage P0247|Turbocharger Wastegate Solenoid 2 P0248|Turbocharger Wastegate Solenoid 2 Performance P0249|Turbocharger Wastegate Solenoid 2 Low Voltage P0250|Turbocharger Wastegate Solenoid 2 High Voltage [/table]

---

If your check engine light is on, you can connect a OBDII scanner and retrieve a code. Cross reference that code here to find the source of your problem.

---

The fluid capacities of Jeep vehicles

Jeep Wrangler TJs

---

Explaination of the TJ Wrangler diagnostic codes