Exception in rendering!

Message: window is not defined

ReferenceError: window is not defined
    at new c (/tmp/execjs20161208-83728-1709lrajs:136:3912)
    at m.mountComponent (/tmp/execjs20161208-83728-1709lrajs:47:15602)
    at /tmp/execjs20161208-83728-1709lrajs:49:31860
    at a.r.perform (/tmp/execjs20161208-83728-1709lrajs:47:12503)
    at Object.a [as renderToString] (/tmp/execjs20161208-83728-1709lrajs:49:31821)
    at r (/tmp/execjs20161208-83728-1709lrajs:50:21164)
    at Object.S.ReactOnRails.serverRenderReactComponent (/tmp/execjs20161208-83728-1709lrajs:32:6073)
    at eval (eval at <anonymous> (/tmp/execjs20161208-83728-1709lrajs:173:8), <anonymous>:10:23)
    at eval (eval at <anonymous> (/tmp/execjs20161208-83728-1709lrajs:173:8), <anonymous>:17:3)
    at /tmp/execjs20161208-83728-1709lrajs:173:8

Q: Can you have a bad PCM but have no check engine light on?

asked by on

My vehicle has all the necessary essentials to run ( spark, air, fuel. ) Witch makes me think it could be the pcm. But I do not have a check engine light on. Is it possible to have a bad PCM but not have a check engine light on?

A: Hello and thank you for contacting YourMech...

Hello and thank you for contacting YourMechanic. PCM's typically fail for one of two reasons: voltage overloads (often due to a short in a solenoid or actuator circuit) or environmental factors (corrosion, thermal stress or vibration). If water gets inside a PCM, it can short circuits and set up irreversible corrosion that ruins electronic connections. The PCM should give you a code for P0600 through P0606 indicating that the computer has a processor error.

However, if the PCM is corrupt, then just like a desktop computer, there is no accessing anything and no codes are put out for the computer would have no way of sending a signal. If you need further assistance troubleshooting your PCM, then seek out a technician, such as one from YourMechanic, to come to your location for an inspection.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Car shakes and vibrates

A concern like this can be produced by a number of different things. Such as; a large vacuum leak in the intake system, lack of airflow to the intake system, lack of fuel delivery caused by a failing fuel pump,...

Q: Car lost power due to computer glitch

I don't have the exact repair information for your vehicle since it is so new. My guess is, however, the powertrain control module (PCM) is sensing low oil pressure when it shouldn't be. This could be because of a problem...

Q: I need help with diagnostic trouble codes that suddenly appeared making vehicle almost undriveable.

Firstly, you should have the battery disconnected and the PCM disconnected. Check their connectors for any problems and apply dielectric lube to the connectors so the connection is clean from corrosion. If the problem continues then replace the PCM. All...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...