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.
1994 Jaguar XJ6 BaseFACTORY OEM SERVICE PROCEDURE
Trouble Code Definition
DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| Code | Affected Circuit | Probable Cause | ||||
|---|---|---|---|---|---|---|
| 12 | Mass Airflow Sensor | Not Within Range | ||||
| 14 | Engine Coolant Temperature Sensor | Open Or Short Circuit | ||||
| 16 | Air Temperature Sensor | Not In Operating Range | ||||
| 17 | Throttle Position Sensor | Open Or Short Circuit | ||||
| 18 | TPS/Mass Airflow Sensor | Signal Resistance Low At WOT | ||||
| 19 | TPS/Mass Airflow Sensor | Signal Resistance High At Idle | ||||
| 22 | Heated O2 Sensor/Fuel Pump Relay | Voltage Not Within Range | ||||
| 23 | Fuel Control | Rich Fuel Mixture | ||||
| 24 | Ignition Amplifier | Voltage Not Within Range | ||||
| 26 | Air Leak, Running Lean | Air Leak/Lean Fuel Mixture | ||||
| 29 | Powertrain Control Module | Internal Fault | ||||
| 33 | Fuel Injector | Voltage Not Within Range | ||||
| 34 | Fuel Injector | Faulty Injector Indicated | ||||
| 37 | EGR Solenoid Valve | Voltage Not Within Range | ||||
| 39 | EGR Function | Faulty System Operation | ||||
| 44 | Heated Oxygen Sensor | Fuel Mixture Rich Or Lean | ||||
| 46 | Idle Air Control Valve (Coil 1) | Voltage Not Within Range | ||||
| 47 | Idle Air Control Valve (Coil 2) | Voltage Not Within Range | ||||
| 48 | Idle Air Control Valve Position | Not Within Specification | ||||
| 66 | Air Injection Pump Relay | Incorrect Signal | ||||
| 68 | Speed Sensor | Incorrect Signal Voltage | ||||
| 69 (1) | Park/Neutral Position Switch | Engine Cranks In Drive | ||||
| 69 (2) | Park/Neutral Position Switch | Engine Cranks In Drive | ||||
| 89 | EVAP Canister Purge Control Valve | Volts Not Within Range | ||||
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DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| Code | Affected Circuit | Probable Cause |
|---|---|---|
| 13 | Manifold Absolute Pressure (MAP) Sensor | Not Within Range |
| 14 | Engine Coolant Temperature Sensor | Open Or Short Circuit |
| 16 | Intake Air Temperature Sensor | Not In Operating Range |
| 17 | Throttle Position Sensor | Not In Operating Range |
| 18 | TPS/MAP Sensor | Signal Resistance Low At WOT |
| 19 | TPS/MAP Sensor | Signal Resistance High At Idle |
| 23 | Fuel Control | Rich Fuel Mixture |
| 34 | Fuel Injector (Right Bank) | Faulty Injector Indicated |
| 36 | Fuel Injector (Left Bank) | Faulty Injector Indicated |
| 44 | Heated O2 Sensor (Right Bank) | Fuel Mixture Rich Or Lean |
| 45 | Heated O2 Sensor (Left Bank) | Fuel Mixture Rich Or Lean |
| 49 | Power Resistor | Faulty Power Resistor |
| 67 | Secondary Air Injection System | Faulty Secondary Air Injection System |
| 77 | RPM Signal | No RPM To PCM |
Factory Service Tools
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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.