P1121

Engine Coolant sensor out of range/ECT Sensor Out Of Self Test Range

DTC P1121, sometimes indicated as P112100 is an OBD diagnostic trouble code indicating a manufacturer-specific fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the air/fuel mixture causing engine coolant sensor out of range/ect sensor out of self test range.

  • P1121: Engine Coolant sensor out of range/ECT Sensor Out Of Self Test Range

See Also: Related Error Codes
DTC Trouble Code Search
Bulletins

Bulletins are notices put out by manufacturers in conjunction with the NHTSA to notify the public of manufacturing issues or changes.

  • KC-456 - ENGINE AND ENGINE COOLING
    MACK: Exhaust gas recirculation (egr) system - fault codes spn 412 fmi 0,2,5; diagnostic trouble codes (dtc) P040A, P040B, P1121 - temperature sensor inspection
  • KC-456 - EQUIPMENT
    VOLVO: Exhaust gas recirculation (egr) system - fault codes spn 412 fmi 0,2,5; diagnostic trouble codes (dtc) P040A, P040B, P1121 - temperature sensor inspection
  • K86900043 - ENGINE AND ENGINE COOLING:EXHAUST SYSTEM
    VOLVO: Exhaust gas recirculation (egr) system - fault codes spn 412 fmi 0,2,5; diagnostic trouble codes (dtc) P040A, P040B, P1121 - temperature sensor inspection
  • K86900043 - ENGINE AND ENGINE COOLING
    MACK: Exhaust gas recirculation (egr) system - fault codes spn 412 fmi 0,2,5; diagnostic trouble codes (dtc) P040A, P040B, P1121 - temperature sensor inspection
  • K52535491 - ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE)
    VOLVO: Diagnostic / troubleshooting procedures for egr system components; diagnostic trouble codes (dtc) P0401-00, P0402-00, P04DD-00, P1121-00, P1121-98 or spn 2659 fmi 16, spn 2659 fmi 18, spn 412 fmi 0, spn 412 fmi 15 - us10, us10+obd13, us14+o
  • K52535491 - ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE)
    MACK: Diagnostic / troubleshooting procedures for egr system components; diagnostic trouble codes (dtc) P0401-00, P0402-00, P04DD-00, P1121-00, P1121-98 or spn 2659 fmi 16, spn 2659 fmi 18, spn 412 fmi 0, spn 412 fmi 15 - us10, us10+obd13, us14+o
  • K86900043 - ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE)
    MACK: Egr fault codes / diagnostic trouble codes ( dtc's ) spn 412 fmi 0,2,5, spn 4752 fmi 7, spn 2659 fmi 18 / P040A, P040B, P1121, P2457, P0401, P04D9
  • K86900043 - EQUIPMENT
    VOLVO: Egr fault codes / diagnostic trouble codes ( dtc's ) spn 412 fmi 0,2,5, spn 4752 fmi 7, spn 2659 fmi 18 / P040A, P040B, P1121, P2457, P0401, P04D9
  • 02405 - ENGINE AND ENGINE COOLING
    TOYOTA: Mil on dtc P1121. *sc
  • 31005 - VEHICLE SPEED CONTROL:CABLES
    JAGUAR: Some vehicles may default to limp home mode because the throttle cable is improperly adjusted. The condition will be accompanied by diagnostic trouble code (dtc) P1121 and / pr P1632 being stored in the memory of the engine control mod
  • 31005 - VEHICLE SPEED CONTROL:CABLES
    JAGUAR: Some vehcin built within vin 031303-on - 853936-on may default to limp home mode because the throttle cable is improperly adjusted. The condition will be accompanied by diagnostic trouble code (dtc) P1121 and / or P1632 being stored in
Consumer Complaints for this DTC



2010 FORD FUSION with 60000.0 miles

The first time the incident occurred i was riding down the interstate and just out of no where the car cuts off without warning....In the middle of traffic!!! The orange wrench light came on and then the engine light. I was able to get to the side of the road and restart the car. I was able to get a diagnostic test done at oreilys and the code P1121 (or something like that) indicated that the throttle control was stuck open. I was able to drive the car on without incident. It has cut off several times since then without warning, but i continue to drive because this is my only form of transportation. It is totally unpredictable and dangerous!!! After talking to other Ford owners and doing my research online i see this is not an isolated problem. This is unsafe and the part should be recalled!!!! I have continued to drive and make sure that i am very cautious and i try not to go over 60mph, but after it happened again yesterday in a very compromising scenario... I'm going to have to buckle down and get it fixed.$$$$$$$$$$ i will never buy a Ford again! *ln
UNKNOWN OR OTHER, ENGINE VEHICLE SPEED CONTROL



2009 TOYOTA PRIUS with 101645. miles

My car recently has a check engine light and the obdii scanner show the fault code P1121 which is a failed three-way coolant control valve. Toyota has issued a technical service bulletin (tsb) on this problem: eg001-08 m.I.L. It should be a recall because it's a common problem for 2nd generation Toyota Prius.
ENGINE,



2009 TOYOTA PRIUS with 65000.0 miles

When my 2009 Toyota Prius reached approximately 65,000 miles, the check engine light came on, and the error code was P1121, indicating a problem with the coolant control valve. I took the car to my local Toyota dealership, and their charge for replacing the part was $400. The mechanic who inspected the valve said it was not closing securely. He said making the repair would not improve the car's performance or affect its value, and therefore he did not recommend making the repair. Unfortunately, i have realized that opting out of this repair does affect the car's safety. The check engine light is constantly on. Even if i manually turn it off, it comes right back on, so it is unlikely that i will be aware if other mechanical issues ever arise. My mother drives a 2008 Toyota Prius which just hit 65,000 miles, and her car produced the exact same error code. It is statistically impossible that two cars of the same make and model, only a year apart in age, in the same household, would produce identical error codes after reaching roughly the same mileage for any reason other than defective manufacturing. I believe this error code is the result of a manufacturing error that Toyota should address through a safety recall. Toyota's own mechanic admitted that the repair is financially impractical for customers, yet if the repair is not made, drivers are left without a functional check engine light which is a safety hazard.
ENGINE,



2009 TOYOTA PRIUS with 50000.0 miles

Service engine light, code P1121, coolant recovery tank flow control valve bad. There is a service campaign on this for 2007 Prius and the problem is supposed to be solve for 2009 Prius. Also this is part of the emission control system, as the purpose of coolant recovery tank is the warm up engine sooner to pass emission test. Called Toyota dealer, not covered by emission warranty. This is a known and very common problem and Toyota is dragging its leg on it.
ENGINE, POWER TRAIN



2006 TOYOTA PRIUS with 120000. miles

The check engine light comes on whenever outside temperature is above 45f or so. Took it to Toyota dealership and they said it was a faulty coolant flow control valve that was resulting in code P1121. The dealer said this was a safety issue since coolant can leak out, and recommended it be fixed asap at a cost of nearly $1000. This is not an uncommon problem for Prius's and an online search showed that Toyota did cover this under warranty (extension) for some model years up to 35k miles. I wrote to Toyota motor sales to ask if they would cover or assist with the repair cost, and if there was a hidden recall or warranty extension on this issue, and they responded that i should just try to negotiate a better price with the dealer. I think Toyota should cover this, it is a safety issue and should have been a recall.
ENGINE AND ENGINE COOLING,



2003 SUZUKI GRAND VITARA

8/14/03 - 2003 Suzuki Grand Vitara, [xxx], purchased at Suzuki of des moines, po box 13377, des moines ia 50310, 515-270-5800. 1/13/04 - received recall letter regarding accelerator cable casing cap. 1/17/04 - had car repaired. 9/9/04 - headlights on at end of day when leaving work and battery dead. Jump-started car and took to dealer; notice smell of something burning. 9/21/04 - car finally fixed. Invoice states: drl lights stay on pulled inside and found light do not turn off but marker lights not on also noticed bcm flashing clock hooked up tech 2 and found code P1121 looked up code in book and run test had to remove bcm from dash to inspect ect wiring run test and bcm appears to be ok but found wire not giving proper reading disconnect relay and light still on disconnect high beam relay and lights go off checked and found high/low switch burnt ordered parts removed switch to replace and found wire connector is burnt extremely bad had to order wire loom to make repair used connector from new loom to repair separated most pins had to solder in 4 wires and secure re assembled and test working fine now." 10/4/04 - received recall letter: "moisture can freeze in the fuel pressure regulator. 10/8/04 - had car fixed. Invoice states: scheduled appointment to fix timing cover which is leaking. 10/9/04 - nhtsa office web site has recall i havent been notified about and need to make sure it doesn't involve my vehicle: windshield. *nm updated 07/27/2012 *js information redacted pursuant to the freedom of information act (foia), 5 u.S.C. 552(b)(6)
ELECTRICAL SYSTEM,



2002 TOYOTA CAMRY with 31998.0 miles

After backing out of driveway into street, when i shifted from "reverse" into "drive", car suddenly had no acceleration. Engine was running, but no movement or ability to "rev" engine. Repair at Toyota dealer stated: "code P1121 diagnosed & replaced accelerator position sensor.
VEHICLE SPEED CONTROL,



2002 TOYOTA CAMRY

In july 2010, i was driving my 2002 Toyota Camry at approximately 40 mph on a heavily traveled two lane highway, accelerating as i approached a grade, when suddenly there was no response from my accelerator pedal. The check engine light came on, and the car stalled. There was a group of bicyclists on the right shoulder. I activated my emergency flashers, and managed with difficulty to pull off the road. I could restart the engine, but the cel remained on, and the car would not respond to the accelerator in any gear. The car was towed to the dealership, where error code P1121 was found. The ecu was replaced, and i was assured the problem had been resolved. This was an extremely dangerous situation that cost me several sleepless nights, and it was fortunate that it did not result in an accident, injury, or worse. On february 17, 2011, i was driving at about 30-35 mph when once again the accelerator would not respond and the cel lit up. This time, the engine did not stall. I pulled off the road and changed gears and depressed the accelerator many times with no response. Finally, the car moved and i was able to drive it the short distance home. After calling the dealership, who agreed the car was not safe to drive until checked, it was towed to the dealer, where the same code P1121 was read. All components indicated by this code were checked and deemed okay. After the dealer contacted Toyota, the car was also checked for grounding and voltage issues. Again, everything checked out okay. The dealership kept and drove the car, trying unsuccessfully to duplicate the problem. It remains there today while we decide what to do with it. The dealership and Toyota are not offering any solutions. I feel that the car is unreliable and unsafe. Research on the internet convinces me this is not an isolated incident, and it needs to be resolved no matter how much it costs. A price cannot be put on life or peace of mind. Please investigate! Updated 06/24/11 *bf repairs attached.. Updated 01/05/2012 *ln
VEHICLE SPEED CONTROL,



2000 TOYOTA TUNDRA with 135000. miles

Driving at 50 mph, engine losses power like fuel is cut off. Check engine light comes on, throttle pedal has no response until 3/4 down . Very dangerous as i was in traffic and could not drive the truck. I was told it is a problem with the accelerator pedal position sensor. Cleared code & happened again 2 days later, this time as i was coming to a stop. Vehicle stalled & would not restart - same code - P1121
VEHICLE SPEED CONTROL,



2000 TOYOTA TUNDRA with 92300.0 miles

I have a 2000 Toyota Tundra and today, the engine stalled at the first light i stopped at. When i restarted the engine, the truck would not accelerate. It would idle, but there was no response to the gas pedal. Since i was on an incline, i could not go forward so i had to reverse slowly back to a parking lot. When we hooked up the obdii code puller, it came back with a P1121 code. I researched on the internet what this was and found out it has to do with an accelerator pedal position sensor (apps). When i restarted the engine after pulling the code, it appears to be working fine. I do not have a warm and fuzzy feeling about driving the vehicle now. I am glad this occurred at a relatively quiet intersection and not on a busy road or highway or in the middle of nowhere. It seems like this is a pretty common problem on these vehicles and seems to be a potentially dangerous condition you can get yourself into. I am hoping there is a good reason for the sensor in the first place.
VEHICLE SPEED CONTROL,



2000 TOYOTA TUNDRA with 244000. miles

2000 Toyota Tundra. Driving along normally ... Suddenly the truck would not accelerate .. It went into idle but pressing the gas pedal did nothing .. I was in traffic, crawling along. I put on my flashers, pulled over to the side of road, shut truck off, then checked the accelerator pedal (nothing unusual), checked the oil (fine), checked the trans fluid (fine). When i restarted the truck - it seemed okay - except the check engine light remained on. I drove the truck to the nearest repair garage. They said the check engine code was P1121 and was a throttle position sensor. They also said they wouldn't touch the vehicle due to all the recent problems with Toyota accelerators. This is an unsafe condition. It could easily have resulted in an accident.
VEHICLE SPEED CONTROL,



2000 TOYOTA TUNDRA with 131000. miles

While pulling a travel trailer with our 2000 Toyota Tundra sr5-v8, we lost power and the check engine came on. After pulling to the side of the interstate, we shut off the engine. After about 5 minutes, we started the engine again, found we had power, but the check engine was still on. We drove another 100 miles to out destination. After several hours, we started the truck again and the check engine light was not on anymore. We had a computer check ran and the code P1121 came up and we were told it would require an accelerator pedal position sensor. We continued to drive the truck for 58 days with no check engine light showing. The check engine light came on again, but went off again.
FUEL SYSTEM, OTHER,

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