P1491 Chrysler Code - Radiator Fan Relay Circuit Condition
Quick Answer
With the key on or engine running, system voltage over 10v, fan relay commanded on, the Powertrain Control Module (PCM) sets the Diagnostic Trouble Code (DTC) when it detects a shorted or open condition in the relay control circuit. Common causes include Faulty Radiator Fan Control Relay, Radiator Fan Control Relay harness is open or shorted, Radiator Fan Control Relay circuit poor electrical connection. 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
- P1491 Chrysler indicates Radiator Fan Relay Circuit Condition.
- Common causes
- Common causes include Faulty Radiator Fan Control Relay, Radiator Fan Control Relay harness is open or shorted, Radiator Fan Control Relay circuit poor electrical connection.
- 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 P1491 Chrysler Description
What are the Possible Causes of the DTC P1491 Chrysler?
- Faulty Radiator Fan Control Relay
- Radiator Fan Control Relay harness is open or shorted
- Radiator Fan Control Relay circuit poor electrical connection
- Faulty Radiator Fan
How to Fix the DTC P1491 Chrysler?
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 P1491 Chrysler 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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Frequently Asked Questions about P1491 Chrysler Code
1. What are the common symptoms of OBDII code P1491 in a Chrysler related to the radiator fan relay circuit?
The common symptoms include the radiator fan not running when the engine is hot, engine overheating, and the Check Engine Light being illuminated.
2. What are some possible causes of OBDII code P1491 in a Chrysler?
Possible causes of code P1491 include a faulty radiator fan relay, a malfunctioning radiator fan motor, wiring issues in the circuit, or a problem with the engine coolant temperature sensor.
3. How can I diagnose the radiator fan relay circuit condition causing OBDII code P1491 in my Chrysler?
You can diagnose the issue by checking the radiator fan relay for proper operation, testing the radiator fan motor, inspecting the wiring and connectors in the circuit, and verifying the engine coolant temperature sensor's functionality.
4. Can I still drive my Chrysler with OBDII code P1491 present?
It is not recommended to drive your Chrysler with OBDII code P1491 present, as it can lead to engine overheating and potential damage. It is best to address the issue promptly.
5. What are some repair tips for resolving OBDII code P1491 related to the radiator fan relay circuit in a Chrysler?
Repair tips include replacing the faulty radiator fan relay, testing and replacing the radiator fan motor if needed, repairing any damaged wiring or connectors, and ensuring the engine coolant temperature sensor is functioning correctly.
6. Is it possible to reset OBDII code P1491 in a Chrysler without fixing the underlying issue?
Resetting the code without addressing the root cause, such as a faulty radiator fan relay, will likely result in the code reappearing once the issue is detected again by the vehicle's system.
7. How important is it to fix OBDII code P1491 in a Chrysler promptly?
It is crucial to address OBDII code P1491 promptly to prevent engine overheating, potential damage to the radiator or other components, and ensure the proper functioning of the vehicle's cooling system.
8. Can a DIY enthusiast tackle the repair of OBDII code P1491 related to the radiator fan relay circuit in a Chrysler?
Depending on your skill level and access to tools, a DIY enthusiast may be able to address the issue by following repair guides and using appropriate diagnostic tools. However, if unsure, it is recommended to seek professional assistance.
9. Are there any preventive measures to avoid encountering OBDII code P1491 in a Chrysler in the future?
Regular maintenance of the cooling system, including checking the radiator fan relay, radiator fan motor, and associated components, can help prevent issues leading to OBDII code P1491 in your Chrysler.
10. How much can I expect to pay for repairing OBDII code P1491 related to the radiator fan relay circuit in a Chrysler?
The cost of repairing OBDII code P1491 can vary depending on the specific issue, parts needed, and labor rates. It is advisable to get estimates from reputable repair shops or dealerships for an accurate cost assessment.
Discuss the causes and fixes for P1491 Chrysler OBDII Code
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2000 Dodge Gra Carivan, 3.3L V6 I found that one of my fan motors was burned up. it kept blowing a fuse so i checked all wiring an when i unhooked the left fan it stopped blowing the fuse. its only cooling on the tranny side but will keep it cool enough for local driving. so if you get the P1491 CODE its not your EGR like i seen on the honda site first opened with this code. Also couldnt find a relay for the radiator fans. You may unhook both fans an hook up one at time to find the bad one. it should have some resitance when you try to free turn the fan. Mine did thats why i disconnected it first.
GOOD LUCK
ASE/MEC -
I have a 1998 Chrysler T&C 3.3L P1491 code with flashing lights on the ac controls and back window wiper controls wonder if anyone has seen this before. Cooling fans do not run.
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For the P1491 code the problem is more than likely the Cooling Fan Motors Relays or the Fan Motors, which should not be related to the back window wiper. I'm not sure about the flashing lights on the A/C controls. I recommend fixing the Cooling Fan Motors Relays or the Fan Motors, and the check the other items.
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