Diagnostic trouble code P1195 is a manufacturer-specific powertrain fault code. Because it is manufacturer-specific, its exact definition depends entirely on the vehicle make, model, and application.
Exact vehicle application must be verified before diagnosis. The code identifies a detected condition in a specific subsystem, but further testing is required to identify the root cause.
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Key Takeaways
- P1195 is a manufacturer-specific code, meaning its definition varies significantly between automakers like Mazda, Hyundai, and Chrysler.
- On Mazda and Ford applications, it indicates an EGR boost sensor or barometric pressure sensor circuit fault.
- On Hyundai applications, it points to an Electronic Throttle System limp home mode or target following delay.
- Diagnosis requires verifying the exact factory definition and testing the relevant sensor or throttle circuits.
P1195 Code Description and Implications
Because P1195 is manufacturer-specific, there is no single universal definition. This trouble code identifies a detected condition, but the exact monitored system depends on the vehicle make and model.
Some Mazda and Ford applications: P1195 indicates an “EGR Boost Sensor” or “Barometric Pressure Sensor” circuit malfunction. The powertrain control module detects that the sensor signal voltage is outside the expected range.
Some Hyundai applications: P1195 indicates an “Electronic Throttle System Limp Home – Target Following Delay” fault. The module detects that the throttle actuator is struggling to maintain the desired throttle position.
Some Chrysler, Dodge, and Jeep applications: P1195 may indicate a slow response from a heated oxygen sensor or a general fuel and air metering fault.
Common Causes of the P1195 Code
For Mazda and Ford applications, possible causes include a failed EGR boost sensor, a failing barometric pressure sensor, or damaged vacuum hoses connected to the sensor.
Damaged wiring, poor electrical connections, or an open or short in the sensor circuit can also trigger the code on these platforms.
For Hyundai applications, causes may involve carbon buildup in the throttle body, a failing throttle position sensor, or a malfunctioning electronic throttle actuator motor.
For Chrysler applications, a failing oxygen sensor or damaged sensor wiring can cause a slow response fault.
Symptoms Associated With P1195
On Mazda and Ford applications, symptoms may include an illuminated Check Engine Light and potential issues with EGR system operation or altitude compensation.
On Hyundai applications, the most noticeable symptom is the engine entering a limp home mode, resulting in severely reduced power, sluggish acceleration, and poor throttle response.
On Chrysler applications, symptoms may include reduced fuel efficiency, rough idling, and an illuminated Check Engine Light.
Diagnosing the P1195 Trouble Code
Diagnosis must begin by confirming the exact factory definition for the specific make, model, and year.
For Mazda and Ford applications, technicians inspect the vacuum hoses on the EGR boost sensor for cracks or disconnections, and test the sensor circuit for proper voltage and ground.
For Hyundai applications, technicians inspect the throttle body for carbon buildup, test the throttle position sensor signals, and verify the throttle actuator motor operation.
For Chrysler applications, technicians monitor the oxygen sensor live data to verify if the sensor response is genuinely slow compared to manufacturer specifications.
Repairing the P1195 Issue
If an EGR boost or barometric sensor fault is confirmed on a Mazda or Ford application, the damaged vacuum hoses must be replaced, or the confirmed failed sensor must be replaced.
If an electronic throttle system fault is confirmed on a Hyundai application, the throttle body must be cleaned, or the confirmed failed throttle actuator or position sensor must be replaced.
If an oxygen sensor fault is confirmed on a Chrysler application, the confirmed failed sensor or damaged wiring must be replaced or repaired.
Cost Considerations for P1195 Repairs
Cost depends on diagnostic time, component accessibility, required parts, programming requirements, and labor.
Replacing a barometric sensor or oxygen sensor involves standard labor times, while replacing an electronic throttle body assembly requires additional calibration and programming steps.
Prevention Strategies for Future Occurrences
Some electrical and mechanical failures cannot be reliably prevented.
On applications using electronic throttle bodies, keeping the air intake system clean and replacing the engine air filter at recommended intervals can help reduce carbon buildup on the throttle plate.
Inspecting vacuum hoses and sensor wiring for heat damage or chafing can help prevent intermittent circuit faults.
Troubleshooting Tips and Best Practices
Never assume P1195 is a universal electronic throttle code. Always verify the exact definition for the specific vehicle before purchasing parts.
Do not ignore related codes. An EGR boost sensor fault may appear alongside other EGR system codes, while a throttle fault may appear alongside accelerator pedal position sensor codes.
Check for technical service bulletins related to updated sensors or revised throttle body assemblies for your specific model year and engine configuration.
More OBD-II Codes
| P1188 | P1196 | P0100 | P1101 |
| P1189 | P1197 | P0101 | P1102 |
| P1191 | P1198 | P1403 | P1103 |
| P1192 | P1199 | P1404 | P1104 |
| P1193 | P1200 | P1105 | P1106 |
| P1194 | P1201 | P1107 | P1108 |
Frequently Asked Questions
Is P1195 a generic or manufacturer-specific code?
No. P1195 is a manufacturer-specific code. Its exact definition varies between automakers, so the factory service information for the specific vehicle must be consulted.
Can I drive my car with a P1195 code?
It depends on the application. If the code triggers a limp home mode on a Hyundai, power is severely reduced, making driving unsafe or difficult.
Will disconnecting the battery clear the P1195 code?
Disconnecting the battery may temporarily clear the code, but it does not repair the underlying electrical or mechanical fault. It also resets readiness monitors.
Can a vacuum leak cause a P1195 code?
Yes. On specific Mazda and Ford applications, a cracked or disconnected vacuum hose on the EGR boost sensor can cause the sensor to read incorrectly and trigger this code.
Does P1195 always mean the electronic throttle body is bad?
No. While a throttle issue is a cause on specific Hyundai applications, the code indicates an EGR boost sensor or oxygen sensor fault on other manufacturers.
What Should You Do About the P1195 Code?
Confirm the exact factory definition and diagnostic procedure for your specific vehicle application. Because P1195 is manufacturer-specific, identifying whether it relates to an EGR boost sensor, an electronic throttle system, or an oxygen sensor is mandatory.
Follow the applicable manufacturer diagnostic steps to test the relevant system and components. Once the root cause is confirmed, complete the necessary repairs and verify that the system operates correctly and the code does not return.
