Limp mode: Codes, Causes & Fixes

P0299 Powertrain The turbo or supercharger isn't building the boost pressure the engine computer is asking for. Moderate P0606 Powertrain The engine computer failed its own internal self-test – check its power and grounds before… Moderate P0700 Powertrain The transmission computer found a fault and asked for the check engine light – read the TCM… Moderate P2002 Powertrain The ECU thinks the diesel particulate filter isn't trapping soot properly — or it can't measure… Moderate U0073 Network A module saw so many errors on CAN bus A that it shut off its own transmitter. High U0100 Network Another module stopped hearing from the engine computer on the CAN network. High

C1130 Nissan · Chassis The ABS/VDC unit isn't getting a valid engine signal from the ECM, so it switches stability… Moderate C121C Jeep · Chassis The ESC module asked the engine to cut power and the PCM refused, so stability and traction… Low P0001 Powertrain The PCM can't drive the solenoid that meters fuel into the high-pressure pump. Often a no-start… High P0045 Powertrain The engine computer sees an open or shorted circuit to the solenoid that controls turbo boost. Moderate P0046 Powertrain The boost control solenoid circuit is intact, but boost doesn't follow what the solenoid… Moderate P0068 Powertrain The airflow the engine measures doesn't match what the throttle opening says it should be. Moderate P0087 Powertrain Measured fuel pressure has dropped well below what the engine computer is asking for. High P0088 Powertrain Rail pressure is running well above the value the engine computer is commanding. Moderate P0089 Powertrain The fuel pressure regulator is getting its commands but pressure isn't responding the way it… Moderate P0090 Powertrain The engine computer sees an electrical fault in the wiring or coil of the fuel pressure control… Moderate P0100 Powertrain The PCM sees an electrical fault in the MAF sensor circuit: signal missing, erratic or not… Low P0102 Powertrain The MAF signal is too weak for the PCM to accept, so it treats the circuit as dead… Moderate P0108 Powertrain The MAP signal is pinned near 5 volts, so the PCM sees impossibly high manifold pressure even… Moderate P0121 Powertrain The throttle position reading is electrically valid but doesn't agree with engine load, airflow… Moderate P0122 Powertrain The throttle position signal fell to nearly 0 volts, lower than a closed throttle could ever… Moderate P0123 Powertrain The throttle position signal is stuck near 5 volts, so the PCM sees wide open throttle even… Moderate P0182 Powertrain The fuel temperature signal is pulled close to 0 V, so the engine computer thinks the fuel… Low P0190 Powertrain The signal from the fuel rail pressure sensor has dropped out or become unusable to the engine… Moderate P0192 Powertrain The rail pressure sensor signal voltage has fallen below the lowest value a working sensor can… Moderate P0193 Powertrain The rail pressure sensor signal is stuck near the 5-volt limit, above anything a working sensor… Moderate P0200 Powertrain The ECU found a fault in the injector control circuits that it can't pin on one cylinder, often… High P0216 Powertrain The ECU can't control or confirm injection timing, usually on a diesel with an electronic… High P0217 Powertrain The engine overheated. Stop driving: continuing can warp the head, blow the head gasket… Critical P0218 Powertrain The transmission fluid got hotter than the computer allows, from heavy load, low fluid… High P0221 Powertrain The second throttle angle signal leaves its window or stops following the plate, so power… Moderate P0234 Powertrain Boost rose above the safe limit the engine computer allows, so it may cut power to protect… High P0235 Powertrain The engine computer found an electrical fault in the boost pressure sensor's wiring… Moderate P0236 Powertrain The boost sensor's signal is electrically OK, but its readings don't make sense compared… Moderate P0237 Powertrain The boost sensor signal has dropped near zero volts, reading less pressure than the atmosphere… Moderate P0238 Powertrain The boost sensor signal is stuck near 5 volts, so the computer sees impossibly high boost… Moderate