Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer thinks the engine is not idling correctly when it's cold. It's like when you try to start running in the morning but your legs feel stiff and don't move as they should.
The engine control module (ECM) detects that the idle air control system is not maintaining the expected RPM during a cold start on Bank 2.
The P1498 code indicates that the ECM has detected an implausible RPM reading from the idle air control system during a cold start condition on Bank 2. This may be due to a malfunction in the idle air control valve, a vacuum leak, or a faulty sensor reading.
• Rough idle during cold start
• Check Engine Light illuminated
• Engine stalls after starting
• Faulty idle air control valve
• Vacuum leak in the intake system
• Faulty engine coolant temperature sensor
ECM: Engine Control Module
RPM: Revolutions Per Minute
• Use an OBD-II scanner to confirm the code.
• Inspect the idle air control valve for proper operation.
• Check for vacuum leaks in the intake system.
• Replace the idle air control valve if faulty.
• Repair any vacuum leaks found in the intake system.
• Replace the engine coolant temperature sensor if necessary.
• OBD-II scanner
• Vacuum gauge
• Multimeter
$150 - $400
Moderate
• Toyota Camry
• Honda Accord
• Ford F-150
• Regular maintenance of the idle air control system.
• Check for vacuum leaks periodically.
• Ensure sensors are functioning correctly.
Engine Performance
• Avoid driving the vehicle until the issue is resolved to prevent stalling.
• Consult a professional mechanic for accurate diagnosis.
Check vehicle warranty coverage for emissions-related components.
This code has been associated with cold weather conditions affecting idle stability in certain vehicles.
Moderate – It is advisable to address this issue soon to prevent stalling and ensure smooth engine operation.
Driving with an unresolved idle issue can lead to stalling, which may pose a safety risk.
• Cold start conditions
• Engine at idle
The idle air control valve is typically located on the throttle body of the engine.
Q: Can I drive with a P1498 code?
A: It's not recommended to drive with this code as it may cause the engine to stall.
Q: What happens if I ignore this code?
A: Ignoring this code can lead to poor engine performance and potential stalling.
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Fitment Required · Vehicle-fitment part
Relevant when coolant-temperature and warm-up faults indicate a thermostat-related issue.
Coolant-temperature and warm-up faults often lead to thermostat testing and replacement.
Thermostats are vehicle-specific and should be matched by engine and housing style.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.