P1189 Code - Fuel Pressure Monitoring - Governor Deviation at Engine speed Too high
Quick Answer
Fuel pressure monitoring is used to detect the troubles and the fuel leakage in high pressure system. Common causes include Faulty Fuel filter, Faulty Injector, Faulty Electric fuel pump. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1189 indicates Fuel Pressure Monitoring - Governor Deviation at Engine speed Too high.
- Common causes
- Common causes include Faulty Fuel filter, Faulty Injector, Faulty Electric fuel pump.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P1189 Description
The Engine Control Module (ECM) determines the rail pressure value as a function of the engine’s operating conditions and controls the fuel pressure regulator to ensure that the rail pressure reaches the required value.
Fuel pressure in the fuel line including the pumps and injector are continuously monitored during engine running.
If the rail pressure is excessive, the fuel pressure regulator opens and a portion of the fuel is returned from the rail to the fuel tank via a collector line. If the rail pressure is too low, the fuel pressure regulator closes.
The fuel pressure regulator closes. the fuel pressure regulator is installed in the tail end of high pressure accumulator.
In case of the insufficient fuel supply in the fuel line, the engine symptoms will occur a shut down and a starting impossible.
If the fuel pressure monitoring in engine fuel pressure line generates threshold value, the ECM judged this as a fault and the P1189 code is set.
What are the Possible Causes of the DTC P1189?
- Faulty Fuel filter
- Faulty Injector
- Faulty Electric fuel pump
- Faulty Fuel Pressure Regulator (FPR)
- Faulty Rail Pressure Sensor (RPS)
- Engine Control Module (ECM)
How to Fix the DTC P1189?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1189 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Information for Specific Makes
- P1189 Audi — Linear O2 Sensor Compensation Resistor Short to B+
- P1189 BMW — Fuel Control Bank 2 Sensor 1
- P1189 Buick — Engine Oil Pressure Switch Fault
- P1189 Cadillac — Engine Oil Pressure Switch Fault
- P1189 Chevrolet — Engine Oil Pressure Switch Fault
- P1189 Chrysler — Throttle Inlet Pressure Sensor Low
- P1189 Dodge — Throttle Inlet Pressure Sensor Low
- P1189 Ford — Pump Speed Signal Fault
- P1189 GMC — Engine Oil Pressure Switch Fault
- P1189 Hyundai — Fuel Pressure Monitoring - Governor Deviation at Engine speed Too high
- P1189 Jeep — Throttle Inlet Pressure Sensor Low
- P1189 KIA — Fuel Pressure Monitoring - Governor Deviation at Engine speed Too high
- P1189 MINI — Fuel Control Bank 2 Sensor 1
- P1189 Pontiac — Engine Oil Pressure Switch Fault
- P1189 RAM — Throttle Inlet Pressure Sensor Low
- P1189 Saturn — Engine Oil Pressure Switch Fault
- P1189 Volkswagen — Linear O2 Sensor Compensation Resistor Short to B+
Frequently Asked Questions about P1189 Code
1. What are common symptoms of OBDII code P1189?
- Common symptoms include rough idling, reduced engine power, stalling, and poor fuel efficiency.
2. What are the possible causes of OBDII code P1189?
- Possible causes include a faulty fuel pressure regulator, clogged fuel filter, fuel pump issues, or a vacuum leak.
3. How can I diagnose the cause of OBDII code P1189?
- You can diagnose the issue by checking the fuel pressure with a gauge, inspecting the fuel filter for blockages, and performing a visual inspection for any visible leaks.
4. Can a dirty fuel injector cause OBDII code P1189?
- Yes, a dirty or malfunctioning fuel injector can disrupt the fuel pressure and contribute to triggering code P1189.
5. Is it safe to continue driving with OBDII code P1189 present?
- It is not recommended to drive with this code present, as it can lead to further damage to the engine and components if left unresolved.
6. How can I clear OBDII code P1189 from my vehicle's system?
- Clearing the code can be done with an OBDII scanner, but it is important to first address and fix the underlying issue causing the code.
7. Can a DIY enthusiast repair OBDII code P1189 at home?
- Depending on the cause, some DIY enthusiasts may be able to address the issue at home by replacing the fuel filter, cleaning the fuel injectors, or checking for vacuum leaks.
8. Will OBDII code P1189 cause my vehicle to fail an emissions test?
- Yes, having this code present can cause your vehicle to fail an emissions test due to the fuel system's improper functioning.
9. How much does it typically cost to repair OBDII code P1189 at a mechanic?
- The cost of repair can vary depending on the exact cause, but it may range from $100 to $500 or more, including parts and labor.
10. What long-term effects can OBDII code P1189 have on my vehicle if left untreated?
- If left untreated, code P1189 can lead to engine misfires, decreased fuel economy, and potential damage to the engine components over time.
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