Code 13 'Fixed', Simptoms Still Present - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Pacman · 11-27-2005, 05:11 PM

Sorry for the long read...

Code 13: Coolant Temperature Sensor Circuit

Symptoms: My car ('91) is running horribly. It sounds like it misses (small pops) at idle and when I shift. Theres a lack of power. My engine fluctuates at idle and causes the whole car to vibrate.

What I've done: I re-gapped the plugs and played with the timing. I checked for codes and it read code 13: coolant temp. sensor circuit (no CEL though). I check my FSM and it says test sensor for continuity. The reading is higher then listed in ohms so I figure theres too much resistance. I test the voltage on the connector, FSM says ABOUT 5V, my connector reads 4.85V. Close enough. Voltage and ground are not a problem. I remove the sensor and install one out of a '95 manifold. I clear the codes and start the motor. It still runs like it did but the code is gone. The ECU now reads code 55 which is all clear.

The engine still sounds like its missing but theres no code with this sensor, or CEL for that matter. It started doing this within the day or so. Please help.

sdtouge · 11-27-2005, 06:14 PM

unplug the battery.
go eat lunch.
come back and start the car let it run.
turn it off and check codes.
make sure its plugged in.

Pacman · 11-27-2005, 07:13 PM

Codes still present. No CEL. I'll try that tomorow. Its my daily so I'm forced to drive with t, I hope it doesn't screw anything up.

sdtouge · 11-27-2005, 08:35 PM

i tihnk your car would just run rich (bad fuel economy) i cant tihnk of anything more then that.

Pacman · 11-27-2005, 10:56 PM

Well, my stepdad took my car to the gas station since I had his truck and he said that ALL the dummy lights were on (seatbelt, oil, CEL, fuel, etc.) and the gauge cluster lights were really dim. The car ran like crap, bogging tremendously (felt like slipping clutch which it is and a total lack of power) which is why I took the truck. When I got home, the dummy lights were out like normal but the car still ran rough. I don't know why the car suddenly has something wrong with it. Anyone else know of anything? All I keep getting is code 13.

95zilvia · 11-28-2005, 12:06 AM

Maybe your mafs is bad.

Pacman · 11-28-2005, 09:17 AM

Quote:

Originally Posted by 95zilvia

Maybe your mafs is bad.

But why would that trip the coolant code and not the MAFS code?

ni[x]it · 11-28-2005, 09:30 AM

replace the sensor with a new one.
it is 3 dollars. maybe even 4.

the coolent temp sensor will not throw a check engine light.

Pacman · 11-28-2005, 11:19 AM

Why does the code say circuit? Isn't that electrical and not the sensor?

sdtouge · 11-28-2005, 12:39 PM

isnt 14 coolant temp and 13 tps?

Pacman · 11-28-2005, 10:23 PM

13 is Coolant temp sensor, even on the SOHC. 14 is the vehicle speed sensor.

I bought a new sensor which was $18.22 and they had it in stock. I'll install tomorrow and see if that fixes it. Thanks guys.

11-27-2005, 05:11 PM	#1
Pacman Zilvia FREAK! Join Date: Sep 2003 Location: Ohio Age: 37 Posts: 1,149 Trader Rating: (1) Feedback Score: 1 reviews	Code 13 'Fixed', Simptoms Still Present Sorry for the long read... Code 13: Coolant Temperature Sensor Circuit Symptoms: My car ('91) is running horribly. It sounds like it misses (small pops) at idle and when I shift. Theres a lack of power. My engine fluctuates at idle and causes the whole car to vibrate. What I've done: I re-gapped the plugs and played with the timing. I checked for codes and it read code 13: coolant temp. sensor circuit (no CEL though). I check my FSM and it says test sensor for continuity. The reading is higher then listed in ohms so I figure theres too much resistance. I test the voltage on the connector, FSM says ABOUT 5V, my connector reads 4.85V. Close enough. Voltage and ground are not a problem. I remove the sensor and install one out of a '95 manifold. I clear the codes and start the motor. It still runs like it did but the code is gone. The ECU now reads code 55 which is all clear. The engine still sounds like its missing but theres no code with this sensor, or CEL for that matter. It started doing this within the day or so. Please help.

11-27-2005, 06:14 PM	#2
sdtouge BANNED Join Date: Dec 2004 Location: san diego Posts: 479 Trader Rating: (0) Feedback Score: 0 reviews	unplug the battery. go eat lunch. come back and start the car let it run. turn it off and check codes. make sure its plugged in.

11-27-2005, 07:13 PM	#3
Pacman Zilvia FREAK! Join Date: Sep 2003 Location: Ohio Age: 37 Posts: 1,149 Trader Rating: (1) Feedback Score: 1 reviews	Codes still present. No CEL. I'll try that tomorow. Its my daily so I'm forced to drive with t, I hope it doesn't screw anything up.

11-27-2005, 08:35 PM	#4
sdtouge BANNED Join Date: Dec 2004 Location: san diego Posts: 479 Trader Rating: (0) Feedback Score: 0 reviews	i tihnk your car would just run rich (bad fuel economy) i cant tihnk of anything more then that.

11-27-2005, 10:56 PM	#5
Pacman Zilvia FREAK! Join Date: Sep 2003 Location: Ohio Age: 37 Posts: 1,149 Trader Rating: (1) Feedback Score: 1 reviews	Well, my stepdad took my car to the gas station since I had his truck and he said that ALL the dummy lights were on (seatbelt, oil, CEL, fuel, etc.) and the gauge cluster lights were really dim. The car ran like crap, bogging tremendously (felt like slipping clutch which it is and a total lack of power) which is why I took the truck. When I got home, the dummy lights were out like normal but the car still ran rough. I don't know why the car suddenly has something wrong with it. Anyone else know of anything? All I keep getting is code 13.

11-28-2005, 12:06 AM	#6
95zilvia Nissanaholic! Join Date: Jun 2003 Location: South San Francisco Age: 40 Posts: 1,860 Trader Rating: (0) Rides Gallery: 95zilvia Feedback Score: 0 reviews	Maybe your mafs is bad.

11-28-2005, 09:30 AM	#8
ni[x]it Join Date: Nov 2005 Location: Illernois. Posts: 14 Trader Rating: (0) Feedback Score: 0 reviews	replace the sensor with a new one. it is 3 dollars. maybe even 4. the coolent temp sensor will not throw a check engine light.

11-28-2005, 11:19 AM	#9
Pacman Zilvia FREAK! Join Date: Sep 2003 Location: Ohio Age: 37 Posts: 1,149 Trader Rating: (1) Feedback Score: 1 reviews	Why does the code say circuit? Isn't that electrical and not the sensor?

11-28-2005, 12:39 PM	#10
sdtouge BANNED Join Date: Dec 2004 Location: san diego Posts: 479 Trader Rating: (0) Feedback Score: 0 reviews	isnt 14 coolant temp and 13 tps?

11-28-2005, 10:23 PM	#11
Pacman Zilvia FREAK! Join Date: Sep 2003 Location: Ohio Age: 37 Posts: 1,149 Trader Rating: (1) Feedback Score: 1 reviews	13 is Coolant temp sensor, even on the SOHC. 14 is the vehicle speed sensor. I bought a new sensor which was $18.22 and they had it in stock. I'll install tomorrow and see if that fixes it. Thanks guys.