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I am looking at buying a used 2001 f250 v10 that has two error codes and am wondering what the issue might be. the error codes are P0115 and P1289

Submitted: 226 days and 6 hours ago.

Category: Ford

Value: $15

Status: AWAITING CUSTOMER ACTION

Posted by APenland 226 days and 6 hours ago.

Answer

P1289 - Cylinder Head Temperature (CHT) Sensor Circuit High Input (PCM STRATEGIES UP TO AND INCLUDING 1998) Indicates a CHT sensor circuit malfunction (shorted).
Grounded circuit in CHT harness
Damaged CHT sensor
Improper harness connection
Damaged PCM
CHT V PID reading less than 0.2 volts with key ON and engine OFF or during any engine operating mode indicates a hard fault. Note: DTC P0117 may also be reported when this DTC is set, either of these DTC's will activate the MIL light.
I have no info for P0115. But the codes around it point towards the ECT (engine coolant temp sensor). I would check the vehicle for overheating. The P1289 is for the CHT (cylinder head temp sensor). These codes don't just show up for nothing.

226 days and 3 hours ago.

Reply

I was told that the p0155 is the o2 sensor - is that the same?

the p1289 was listed as head temp sensor - the truck did not have a coolant filler cap - could that have made the fault show up?

Accepted Answer

P0155 - HO2S Sensor Circuit Malfunction (HO2S-21) See DTC P0135
P0135 - HO2S Sensor Circuit Malfunction (HO2S-11) During testing the HO2S Heaters are checked for opens/shorts and excessive current draw. The test fails when current draw exceeds a calibrated limit and/or an open or short is detected.
Short to VPWR in harness or HO2S.
Water in harness connector.
Open VPWR circuit.
Open GND circuit.
Low battery voltage.
Corrosion or poor mating terminals and wiring
Damaged HO2S heater.
Damaged PCM.
Wiring.
Damaged HO2S heater.
Damaged PCM.
You originally stated P0115. That's why I couldn't find it. P0155 is for the 02 sensor on the passenger side upstream 02 heater circuit. It is the 02 next to the exhaust manifold on the passemnger side of the engine. Replace the 02 and the CHT. The Cylinder Head Temp sensor is located on the drivers cylinder head near the alternator. You may have to remove the intake.

Accepts:
Expert:	APenland
Pos. Feedback:	99.3 %
Answered:	4/10/2009

Ford Senior Master Technician

ASE Master Certified, ASE Advanced Gasoline/Diesel Engine Performance

226 days and 3 hours ago.

Reply

thank you - thats a great help - sorry about the number screw up.

My son is looking at buying this truck and I wanted to make sure he was not getting into somthing he could not afford to repair.

I think the items you list are minimal cost and easy replace items.

Thank very much for a fast and clear responce.

Posted by APenland 226 days and 3 hours ago.

Answer

No problem. If you have anymore questions , please feel free to ask on this post. Your welcome.

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Question

I am looking at buying a used 2001 f250 v10 that has two error codes and am wondering what the issue might be. the error codes are P0115 and P1289

Answer

Reply

I was told that the p0155 is the o2 sensor - is that the same? the p1289 was listed as head temp sensor - the truck did not have a coolant filler cap - could that have made the fault show up?

Accepted Answer

Reply

Answer

No problem. If you have anymore questions , please feel free to ask on this post. Your welcome.

Related Ford Questions

I was told that the p0155 is the o2 sensor - is that the same?

the p1289 was listed as head temp sensor - the truck did not have a coolant filler cap - could that have made the fault show up?